Prosiding Seminar Nasional Inovasi Teknologi Terapan

Cover, Dewan Redaksi dan Reviewer, Keynote Speaker, Kata Pengantar, Daftar Isi, dan Susunan Acara

Heru Rivai — 2022-01-14

Tema: Peran Strategi Inovasi Teknologi Dalam Mendukung Penguatan Inovasi Daerah

Tempat dan Waktu Seminar: Sungailiat- Bangka, 14 Januari 2022

Keynote Speaker: Prof. Drs. H. Saparudin, M.T, Ph.D (Direktur Utama PT. Bumi Bangka Belitung Sejahtera – BUMD Provinsi Kepulauan Bangka Belitung)

Steering Committee:

I Made Andik Setiawan, Ph.D

Muhammad Subhan, M.T

Eko Sulistyo, M.T

Editors:

Irwan, Ph.D

Dr. Sukanto

Dr. Ilham Ary Wahyudie

Ramli, Ph.D

Heru Riva’i, S.Si

Linda Fujiyanti, M.Kom

Nofriyani, M.TrT

Indah RieskyPratiwi, M.Pd

Reviewers:

Indra Dwisaputra, M.T

Boy Rollastin, M.T

Angga Sateria, M.T

Ocsirendi, M.T

Pristiansyah, M.Eng

Iqbal Nugraha, M.Eng

Ahmat Josi, M.Kom

Nanda Pranandita, M.T

Yang Agita Rindri, M.Kom

Panitia Pelaksana:

Ananda Kunanti

Andri Susanto

Anggun Gina Yuniar

Audy Sifa Azzahrah

Ayu Windarti

Bunga Aprilia A

Dea Amanda

Desvira Yasmitasari

Herda Fitri PR

Irfan Azzam

Irfan Fadlullah

Jessica Aulia Gani

Ahlan Maulidiansyah

Nitalia

Rahmi Nurhaliza

Wulan Safitri

Sekretariat:

OlanRamdhani, S.E

Tim IT:

Riki Afriansyah, M.T

Ronal Satria, S.ST

ROBOT KESEIMBANGAN PADA SEBUAH BOLA MENGGUNAKAN SISTEM KENDALI PID

Muhammad Ferdiansyah — 2022-02-22

The ball balance robot is one of the dynamic balancing robots. This robot must be actively controlled to stabilize it so that it remains balanced perpendicular to 0˚ above the ball on the ground or floor. The control system used is the PID control system. The tests carried out include sensor testing, motor testing, robot response testing, and the implementation of the PID control system on the robot. Of the various tuning methods tested on the robot, the manual tuning method gives the robot a slightly longer fall time of 320ms, compared to other methods, namely Ziegler-Nichlos=70ms, CHR Overshoot 0%=170ms, CHR Overshoot 20%=160ms, and Cohen-Coon =150ms. Overall data processing is processed by the Arduino Mega2560 microcontroller which receives angle readings from the MPU6050 sensor as input and actuation on the stepper motor as output for balancing on the robot.

PERANCANGAN ALAT UJI PENETRASI PADA HELM DENGAN STANDAR SNI 1811-2007 SISTEM SEMI OTOMATIS

Muhammad Iqbal Romadhan — 2022-02-22

Helmet is a head protection device, especially for motorized vehicle drivers in the form of a head covering that protects the head in the event of a collision. Helmets marked with SNI are helmets that have passed the tests required by SNI 1811-2007 and have received the SNI mark. There are many types of helmets on the market that have passed standardized tests and one of them is the penetration test. Penetration test with a conical metal nail for testing. The indenter falls from a maximum height of 1.6 m, if the helmet is see-through, it means the helmet has failed the standard test, and vice versa. Therefore the penetration test tool is a tool design made on a standard SNI 1811-2007 helmet with safe operation. As well as determining the function of the tool parts and the simulation results of this penetration test tool running properly and correctly. The results of the penetration test design that have been carried out are that designing the drawing of the penetration test tool is in accordance with the SNI 1811-2007 standard which is where the height from the tip of the indenter to the test material is 1.6 meters and the specifications of the indenter with a conical indenter tip 60°, metal hardness 40-50 Rockwell -C, and the overall weight is 3 kg. And Design a penetration test tool that has been optimized easily and simply as well as the simulation results of a safe penetration test as needed.

SISTEM KONTROL DAN MONITORING ENERGI LAMPU PINTAR MENGGUNAKAN APLIKASI BERBASIS INTERNET OF THINGS

Shalilla Farrah Sahita — 2022-02-22

Along with the development of increasingly capable technology, people's daily lives can be helped by the presence of smart devices. The most widely used smart devices are smartphones. In this study, a smartphone is used as a device to control artificial lighting in the form of lamps. If lamps generally use an electric switch to turn on and off, this control system allows smartphones to be used as real-time light on-off control remotely using the Internet of Things (IoT). The control system is programmed using Arduino IDE and using NodeMCU ESP8266 microcontroller. This system can be run using a smart home application that connects users with smart lamps. The application is created using Mit App Inventor and the data is stored in a database that is Firebase. In addition, there is a monitoring system to monitor the use of power, energy, voltage, electric current, and conversion of electricity usage costs in lamps through applications found on smartphones and also Firebase.

MONITORING NILAI PH, SUHU, DAN KEKERUHAN AIR PADA PDAM DI KECAMATAN BELINYU BERBASIS IOT

Putri Alwiyah — 2022-02-22

PDAM Belinyu currently has water quality that has not yet reached the standard. Therefore, a measuring instrument is needed to monitor the pH value, temperature, and water turbidity. This study aims to make it easier for PDAM employees to check the IoT-based pH, temperature, and turbidity values of water. The method used in this research is data collection, block diagram design, testing, and data analysis. Based on the tests that have been carried out, the percentage error on the pH sensor sample 1 is 0.000457671% and sample 2 is 0.068227799%, the percentage error on the temperature sensor is 0.7699637% and the average data on the clean water turbidity sensor is 0, 6 NTU and cloudy water of 25.8 NTU.

AUTONOMOUS MOBILE ROBOT DENGAN MENGGUNAKAN METODE SIMULTANEOUS LOCALIZATION AND MAPPING BERBASIS LIDAR

Mashur Arbi Maulana — 2022-02-22

Autonomous mobile robot is a robot that can move independently from point to point. Which is important for working in dangerous area. To move independently, the robot must be able to identify its environment and know its position in the form of two-dimensional map. This research used Simultaneous Localization And Mapping (SLAM) method combined with of RPLidar A1M8 sensor and Robot Operating System(ROS) for identification the evironment. As a results, Autonomous robot is capable of mapping and delivering information of the robot can map and localize its position in an environment with mapping error 0,21% and 1,14% localization. Distance measurement in various angle tendts to stable with mean error 0,98%. Overall, the robot can be used in an empty area or an area with simple obstacle.

RANCANG BANGUN SISTEM PEMINJAMAN MESIN DI BENGKEL MEKANIK POLITEKNIK MANUFAKTUR NEGERI BANGKA BELITUNG BERBASIS WEBMESIN

Mawar Jingga Ing Purwani — 2022-02-22

Bengkel Mekanik Polman Negeri Babel adalah tempat para mahasiswa melakukan praktek mesin. Di Bengkel Mekanik, mahasiswa dan dosen dapat meminjam mesin untuk keperluannya. Di dalam Bengkel Mekanik, terdapat banyak mesin dengan tipe yang berbeda, contohnya ada mesin Bubut, mesin Frais serta mesin yang lainnya. Proses peminjaman mesin di Bengkel Mekanik Polman Negeri Babel masih dilakukan secara manual, yakni dengan melakukan pencatatan peminjaman menggunakan kertas. Hal ini mengakibatkan proses peminjaman menjadi tidak efektif dan proses pelaporan peminjaman menjadi lebih sulit dilakukan. Penelitian ini bertujuan untuk mengatasi permasalahan dalam proses peminjaman mesin di Bengkel Mekanik Polman Negeri Babel melalui pengembangan Sistem Peminjaman Mesin di Bengkel Mekanik Berbasis Web. Metode penelitian yang dilakukan adalah dengan menggunakan model waterfall di mana pengembangan sistem diawali dengan proses analisis, perancangan, pengkodean, pengujian dan pemeliharaan. Hasil penelitian berupa Sistem Peminjaman Mesin di Bengkel Mekanik Berbasis Web. Sistem yang dikembangkan diuji dengan menggunakan metode blackbox testing dan kesesuaian sistem dengan user requirement diujikan ke user untuk mendapatkan user accaptance. Hasil pengujian menunjukkan kesesuaian sistem terhadap masing-masing user.

UJI PERFORMA GENERATOR MIKROHIDRO DC ELEKTRIK DALAM PEMANFAATAN EFISIENSI ENERGI PADA HIDROPONIK SISTEM NUTRIENT FILM TECHNIQUE

Arrois Syaifullah — 2022-02-22

Technological advances in the hydroponic agricultural sector have the potential to be developed. One of them is an electrical energy efficiency system. For this reason, it is necessary to test an appropriate energy source. In this study, the test aims to determine the characteristics of the DC generator, the output of the DC generator will function as a battery charging source which is then used for energy efficiency systems in hydroponics. The test is carried out by comparing the pump height to the DC generator, the incoming water discharge and the DC generator rotation. With a pump height of a DC generator as far as 120 cm and a resistance load of 100 , the flowrate is 1L/minute, the DC generator rotation is 162 rpm and the lowest output power is 0.224 milliWatt. With the pump height to the DC generator as far as 30 cm, the flow rate is 25L/minute, the DC generator rotation is 956 rpm and the highest output power is 0.1 Watt. In other words, the greater the flow/discharge of water that enters the generator, the greater the output produced by the DC micro hydro generator.

PENGARUH VARIAN FRAKSI VOLUME SERAT RESAM DAN SERBUK KAYU SERUK/ MEDANG GATAL TERHADAP UJI TARIK DAN UJI IMPACT KOMPOSIT

Dewa Eza Adriyan Suwanto — 2022-02-22

Resam itself is a wild plant that commonly grows around shady and moist cliffs, resam plants can be found in almost all tropical and subtropical regions in Asia. Previous research using resam fibers as composite reinforcement materials showed that resam fibers have an effect on tensile strength and impact strength based on NaOH treatment. Therefore, the purpose of this study is to utilize resam fiber as a composite reinforcement material. Not only resam fiber, this study also utilizes shaved wood powder / itchy field as a composite strengthening added material. The method used in this study is a factorial experimental method, where the parameters used are variants of fiber volume fraction and wood powder. The volume fraction variant used is 8% fiber: 4% wood powder, 6% fiber: 6% wood powder, 4% fiber: 8% wood powder. The results of tensile testing showed the highest tensile strength was located at a percentage of 8% fiber: 4% of wood powder was 14.5 MPa and the lowest tensile strength was located at 4% of fiber: 8% of wood powder was 12.64 MPa. While the results of impact testing showed the highest impact strength was at a percentage of 8% fiber: 4% wood powder which is 35.52328 Kg /² and the lowest impact strength was located at a percentage of 4% fiber : 8% wood powder which is 23.4041 Kg / mm ².

OPTIMASI AKURASI DIMENSI HASIL CETAKAN PROSES 3D PRINTING YANG TERBUAT DARI FILAMEN NYLON MENGGUNAKAN METODE TAGUCHI

Inne Dwi Agustini — 2022-02-22

Additive manufacturing is a technology for creating real objects directly from CAD models. One of them is 3D printing FDM. The advantages of this technology are that it can print various shapes such as cups and bowls, the material is easy to obtain, low maintenance costs and unattended operation, but it has limitations, one of which is related to the dimensional accuracy of the prints, as a result the resulting product is still not in accordance with the desired design. The final setting of control factors in the optimal FDM 3D printing process is recognized as one of the most important steps to improve product quality. Research on determining the control factors of the Anycubic 4max machine on the bush products made of nylon filament. Varied control factors are nozzle temperature, bed temperature, layer thickness, wall thickness, flowrate, print speed, overlap, infill density, infill speed. Experimental design and optimization using the Taguchi method. The experimental design uses an L₂₇ orthogonal matrix with 3 levels. The results showed that the highest dimensional accuracy was at experimental number 20 with a value of 9.97 mm and the smallest was at experimental number 1 with a value of 9.71 mm. Control factors that affect the FDM 3D printing process, respectively, are layer thickness, nozzle temperature, bed temperature, flowrate, infill speed, overlap, wall thickness, printing speed, and infill density.

RANCANG BANGUN SISTEM STABILISASI SUHU PENGGORENGAN BERBASIS IOT

Karina Zaruska Karin — 2022-02-22

In Bangka Belitung, there’s many UMKM produce souvenirs typical of Bangka Belitung such as kemplang, kretek, crackers, etc. However,the frying technique used by UMKM from the results of visits mostly still uses the manual method, such as UMKM cannot monitor frying temperatures during production and also cannot control them. UMKM in controlling the temperature still use the manual method,namely if the temperature of the oil has started to heat up and the product started to brown,the stove knob is reduced and otherwise if the temperature isn’t hot enough,the stove knob will be raised.However,UMKM can’t detect the temperature used at that time,causing many production defects.From the results that has been carried out in UMKM, technology is needed to stabilize the temperature of the frying pan so that the production results produce the appropriate product. For the implementation of this frying stabilization process using microkontroller technology,where the actuator use servo motor that’s controlled to the stove.While the control process uses fuzzy logic,where the input and output will be set according to the rule base(rules defined according to the frying conditions in UMKM).The average percentage error from the test results of the frying temperature sensor with low input is 6.50%,medium input is 0.74%,and high input is 1.70%.

PERANCANGAN SISTEM CHARGING BATERAI DENGAN DC-DC CONVERTER BERBASIS PANEL SURYA

Supriadi jumandi — 2022-02-22

This study aims to create a solar panel-based battery charging system with a buck boost converter as a control component. The method used is a quantitative method, namely by means of experiments and data collection on each component. The solar panel component used is 100 Wp and can produce a maximum voltage of 12,6 volts. The voltage from solar panels is used as a source of battery charging. The battery used is a 12V 7Ah. In the battery charging process, a buck boobt converter is used as a voltage controller that can increase or decrease the voltage from an unstable solar panel. The voltage used in the battery charging process, the faster the battery will charge. The time required to charge the battery from a voltage of 11,49 volts to 12,48 volts is 80 minutes.

PENGUJIAN SISTEM INFORMASI MANAJAMEN PROYEK AKHIR MENGGUNAKAN METODE BLACK BOX TESTING

Afnil Dwi Oktanto — 2022-02-22

Tahap pengujian pada suatu aplikasi memiliki peran penting dalam memerika suatu komponen fungsi pada sistem tersebut sudah berlajan dengan baik atau masih terdapat kesalahan yang perlu diperbaiki. Sistem informasi manajemen proyek akhir merupakan aplikasi berbasis web yang dirancang untuk membantu kegiatan proyek akhir di Politeknik Manufaktur Negeri Bangka Belitung yang sebelumnya dilakukan secara manual. Pada saat proses perancangan sistem informasi manajemen proyek akhir terdapat tahap pengujian untuk sistem tersebut. Sistem tersebut akan diuji menggunakan motode black box testing dikarenakan teknik tersebut dapat mengetahui kesalahan pada fungsi, interface dan struktur data. Dalam pembuatan test case dan modul saat pengujian sistem menggunakan teknik equivalence partitioning. Teknik Equivalence Partitioning merupakan salah satu teknik pengujian black box yang membagi data masukan menjadi beberapa modul kasus uji berdasarkan fungsi masing-masing.

PENGUJIAN KUAT TARIK PRODUK CETAK 3D PRINTING MATERIAL ABS

Yogie Pranata — 2022-02-22

3D printing technology is an additive manufacturing technology (layer by layer) to create 3D objects with melted filament material. With this 3D printer, users can create a ready-to-use product. This research uses ABS (Acrylonitrile Butadiene Styrene) filament because mechanically this filament is very strong and has resistance to high temperatures. This study aims to find the highest tensile test value from 3D printer printing results with ABS filament specimens, for the factors used are infill layer thickness, wall printing speed, nozzle temperature, bed temperature, print speed, fan speed, infill density, wall thickness, top layers, bottom layers, infill overlap, retraction distance, and retraction speed. Printing is done with the Anycubic 4Max 3D printing machine, while the specimen size is 115 mm x 19 mm x 4 mm. This study uses the Taguchi L16 method with 13 factors and 2 levels printed as many as 48 specimens. So that the tensile test results were obtained with the highest value of 30.46 MPa in the second experiment the lowest with a value of 25.31 MPa in the third experiment. For the calculation of the S/N ratio, the most influential factor is the fan speed.

PERANCANGAN DAN PENGUJIAN SISTEM MONITORING OPERASI ALAT PENGERING LADA MENGGUNAKAN TEKNOLOGI ARDUINO

Reynaldi Pratama — 2022-02-22

Pepper dryer technology often results in an unstable process that affects the drying consistency. This study aims to obtain a monitoring system for temperature, hot air velocity, and humidity of a pepper dryer using Arduino technology. The design of electrical hardware tools using "Fritzing" software. The system components use Arduino as a microcontroller and DS18B20 temperature sensor, DHT22 humidity sensor, wind speed sensor and LCD. System testing was carried out on a pepper dryer to determine the system's ability to measure and display the results of temperature, air velocity and humidity sensor measurements. The measurement of sensor accuracy is carried out by comparing the results of system measurements on the LCD with a thermometer, anemometer and hygrometer in the span of 15, 30, 45, and 60 minutes. The test results show that the drying system operating parameter monitoring system is able to measure and display the results on the LCD with a temperature parameter error rate of 0.54% (99.46%), air flow velocity 0.3% (99.7% accuracy) and humidity. 0% (100% accuracy). The test results show that the drying system's operating parameter monitoring system is able to measure and display the results on the LCD with an accuracy of 0.54% temperature, +/- 1.25% air velocity and 0% humidity. The value of the monitoring results is used as an indicator to regulate the temperature and air velocity can be maintained according to the required value, while the humidity value indicates the water content in the material.

APLIKASI PENJADWALAN PERAWATAN MESIN PADA LABORATORIUM PERMESINAN DASAR DI BENGKEL MEKANIK POLITEKNIK MANUFAKTUR NEGERI BANGKA BELITUNG

Selvi Diana — 2022-02-22

The development of technology is currently used in various fields of science to make work easier. Because of the many features available, it is hoped that this application can be used to display machine maintenance schedules up to complexcity value of 30. By using this application, you can computerize the entire planning calculation process and avoid mistakes in making maintenance plans and damage due to forgetting to do routine maintenance. The application you are building uses the PHP programming language to help developers develop additional applications. It also uses the Codeigniter framework to make the programming process easier for developers. Supported by the waterfall method. This application can also monitor machine maintenance in the basic machinery laboratory of the Bangka Belitung State Manufacturing Polytechnic mechanic workshop

APLIKASI PEMETAAN LOKASI KOS DI KAWASAN POLMAN NEGERI BABEL BERBASIS WEBSITE

Mutrinitami Tamzil — 2022-02-22

The number of students or workers who come to the Polman Negeri Babel area causes the need for boarding houses to increase, however, the availability of information about the location of boarding houses is very limited, making it difficult to find the location of the boarding house that is desired. Therefore, a website-based boarding location mapping application was made which aims to implement a geographic information system using Maps Leaflets which can make it easier for users to find information about boarding houses in the Polman Negeri Babel area and can assist boarding house owners in spreading their boarding houses. This system is made using the waterfall method in order to produce a systematic and sequential system design. In making the system design using use case diagrams and system testing using the blackbox method. The results of making this website-based boarding location mapping application can provide information to users to make it easier to find boarding locations and other information such as facilities, prices, addresses, and the owner's cellphone number.

PENGARUH KAPUR DOLOMIT SEBAGAI ENERGIZER PADA MATERIAL ST 37 PADA PROSES CARBURIZER

Sandi — 2022-02-22

Carburizing is a heat treatment process on the outer layer of the material using carbon as a compaction component. The working principle of this heat treatment is to put carbon around the workpiece when heated with the aim that the carbon will diffuse to the outer layer of the workpiece. In this research, a carburizing process will be carried out with a variety of catalysts on St37 steel. The catalyst variations used were 100% charcoal and 0% lime, 90% charcoal and 10% dolomite lime, 85% charcoal and 15% dolomite lime, 80% charcoal and 20% dolomite lime, 75% charcoal and 25% dolomite lime. To determine the impact of catalyst variations on the carburizing results, a hardness test will be carried out. From the results of research that has been done that a mixture with a variation of 85% charcoal and 25% dolomite lime has the highest average hardness value with a value of 21.5 HRC and the variation of a mixture of charcoal and dolomite lime has a significant effect on the hardness value.

ANALISA PENGUJIAN MESIN LAS SMAW BENGKEL MEKANIK POLITEKNIK MANUFAKTUR NEGERI BANGKA BELITUNG

Muhamad Hafiz — 2022-02-22

SMAW (Shield Metal Arc Welding) welding is a welding process by joining two or more metal materials using a wrapped electrode as heat energy to melt the material. In this study, the SMAW welding machine was tested at the Polman Babel mechanical workshop to determine the difference (difference) between the current output value of the welding machine and the value indicated by the measuring instrument during welding. Then the deviation number is compared with the permissible current tolerance using the British Standard BS 7570:2000 reference standard, which is 10%. Welding machines that will be tested are 2 models, namely ewm pico 300 and Miller gold star 402 as many as 6 pieces. This research uses St37 steel and the current variations used are 75A, 150A and 225A on the ewm pico 300 and 99A, 198A, and 270A on the miller gold star 402 engine. within the tolerance limit where the largest deviation is found in machine 2 setting 75A, which is 7.46%. On the miller gold star 402 machine, there are 2 machines showing current deviations that are outside the permissible tolerances, which at engine 2 settings 198A and 270A are 16.4% and 10.9%, engine 3 all currents are 19.7%, 19 ,1%, 16,2%.

WATER HEATER BERTENAGA MATAHARI MENGGUNAKAN REFLEKTOR

Tia Fatiha — 2022-02-22

Indonesia is one of the countries in the world that is crossed by the equator that cause Indonesia has a duration of 12 hours (or all day). Hence, the sun can be alternative energy. For instance, it can be used for heating water. Water heaters circulating in the market are still priced in quite an expensive range, so innovation is needed. In this research, a tool is made namely a Solar Water Heater which can track the direction of the sun's rays with the addition of a reflector to reflect sunlight to get optimum heat. This study aims to see the difference between a continuous water cycle where the pump will continue to pump water into the tank through a hot cross-section with a delayed water cycle where the pump will stop for 10 seconds so that the water sits on the copper pipe first. Based on the test results, it was found that the Solar Water Heater can heat water in the tank up to 47.35 degrees Celsius in unstable weather and the optimum method for heating the water is the continuous method which has a difference of 6,47 degrees Celsius with the delay method.

PENGEMBANGAN GAME EDUKATIF DAN BAHAN AJAR MATEMATIKA SEKOLAH MENENGAH PERTAMA KELAS VII BERBASIS ANDROID

Sultan Fadel Mubarak — 2022-02-22

In the era of globalization, technological developments have increased rapidly, this has a positive impact in various fields, especially education. The utilization of technology, information, and communication is used to improve efficiency and effectiveness in the teaching and learning process. Less varied mathematics learning will complicate the development of students' skill of thingking. In the learning process, interactive learning media are needed for students which can easily get bored while receiving learning material from teacher. Applications are made using the Research and Development (R&D) method, namely research conducted to test the effectiveness and efficiency of certain products (Sugiyono 2010). As for the development model, implementing the ADDIE development model is a development model consisting of 5 phase, which containing by Analysis, Design, Development, Implementation, and Evaluating of application. The outcome of the research will be implemented into an Android-Based Educational Game Application and Mathematics Teaching Materials for Junior Middle School. The material presented in the application is validated first by material experts and media experts. The application that is run is by the current curriculum and the application can run according to the prototype design.

APLIKASI SENSOR WARNA TCS3200 PADA SISTEM PENYORTIRAN BARANG BERBASIS INTERNET OF THINGS (IOT)

Junaidi Burdadi — 2022-02-22

The rapid development of technology in the industrial world applies the concepts of automation carried out by machines without using human power in the application of a system. There are many systems used to simplify human work, such as item code identifiers in the barcode process. In this journal the TCS3200 color sensor application is used as a medium to read the values of four types of colors, including: red, blue, yellow and green. After the TCS3200 color sensor detects the color, the NodeMcu will process the data which will be grouped into 5 types using four servo motors as arms that function to enter items that have been identified by the TCS3200 color sensor according to their respective color containers. The TCS3200 color sensor is also used as a medium to calculate how many items of each color are detected and will be displayed on the IoT-based blynk application. This application can monitor how much of each color is in the container and can also control to start and stop the system. This test was carried out 9 times and there were no errors in the test and the number that was read on the blynk application and the manual system was the same.

PENGARUH VARIASI (JARAK PENEKANAN)TERHADAP KEKUATAN SAMBUNGAN LAS GESEK (FRICTION WELDING) PADA BAJA KARBON S45C

Muhammad Rizqi fadilah — 2022-02-22

Friction welding is a welding technique that melts metal. Jointing of metals by utilizing the heat generated by friction between metal surfaces in which variations in the pressure distance are determined. The purpose of this study is to determine the strength of the welded joint after the welding process by using variations in the pressure distance of 3mm, 4mm, and 5mm. The material used in this research is carbon steel S45C shaft. Studies have shown that welding at the deepest compression distance produces a very strong welded joint, the greater the stress during the welding process, the stronger the joint in the welding. Welding with compression distances of 4mm and 5mm. and the impact price is higher compared to the 3mm pressing distance.

SISTEM INFORMASI MANAJEMEN PENJUALAN TOKO MUSONG BERBASIS CODEIGNITER (STUDI KASUS TOKO MUSONG)

Rian Dwi cahyadi — 2022-02-22

Musong is a wholesaler of healthy drinks, especially Bangka wild forest honey located in Bangka Belitung. trading activities are still manual and advertising and promotions are still limited. For that we want a data framework that can develop to promote and cooperate with the exchange of transactions so that it is more effective, fast and simple without being hindered by distance and time. The purpose of this study is to develop a business data framework for a website-based Musong store. Therefore, a CODEIGNITER-BASED MUSONG STORE SYSTEM is planned or known as a Web-based business. This application is designed as simple as possible to make it easier for clients to buy goods at the Musong shop online whenever and wherever without taking up time. The use of the site is relied on to expand the scope of advertising, expand the offering.

PENGARUH VARIASI SUSUNAN ARAH DAN FRAKSI VOLUME KOMPOSIT BERPENGUAT LIMBAH FILTER ROKOK SEBAGAI MATERIAL ALTERNATIF TERHADAP KEKUATAN TARIK DAN IMPAK

Dimas Aji Guntoro — 2022-02-22

Cigarette filter waste is something that we often find thrown carelessly in public places almost all over the world. Cigarette filters contain cellulose acetate, which is difficult to decompose naturally and takes a long time to decompose. In response to this, research is needed so that cigarette filter waste has use value and is useful as an effort to handle waste. One of them is by making cigarette butts as an alternative material made from composites. The purpose of this study was to determine the effect of variations in cigarette filter waste fibers on the tensile and impact strength of the polyester matrix. The fiber volume fraction includes 15% : 85%, 22.5% : 77.5%, 30% : 70% with horizontal, vertical and cross fiber directions. The material used is cigarette filter waste fiber. Standard ASTM D-638-1 is used as a reference for tensile tests and ISO 179-1 for impact tests. The results of this study showed that the maximum tensile strength of the fiber volume fraction was 15% with the cross-direction arrangement of 42 MPa and the maximum impact strength was found in the 30% fiber volume fraction and the cross-direction arrangement of 0.03068 J/mm2. Based on these results, the variation of the fiber volume fraction and the matrix affect the tensile and impact strength.

ANALISIS DAYA GENERATOR MAGNET PERMANENT DALAM SKALA LAB UNTUK PROTOTIPE PEMBANGKIT LISTRIK TENAGA ARUS LAUT

Egi Riansyah — 2022-02-22

The entry of electrical energy in Indonesia relies on fossil energy, which is non-renewable energy. Where over time this energy production will decrease and increase natural damage. Therefore, it is necessary to use renewable energy such as ocean current energy, where the potential of this energy in generating electrical power in Indonesia is 17.9 GW. This potential is used to manufacture a prototype of a marine current power plant (PLTAL), where the advantage of this prototype is to use a permanent magnet DC generator which has the advantage that it can be operated without paying attention to frequency stability, so it does not need a governor. The purpose of this study is to analyze the power generated by a permanent magnet DC generator with the rpm value obtained from the DC motor which will later be used as a reference in the PLTAL prototype. The research method used is a quantitative method, by conducting a literature study, designing and compiling the working concept of the tool, testing the tool and collecting data, and the last stage is analysis. The minimum power generated by a permanent magnet generator with a source from a DC motor rotation is 1.55 Watt and the maximum power generated is 12.87 Watt. Permanent magnet DC generator that uses Neodymium (NdFeB) magnets arranged tightly around the rotor can produce a strong induced magnetic field in converting mechanical energy into electrical energy.

STUDI EKSPERIMEN PENGARUH KEKUATAN MATERIAL KOMPOSIT HGM, EPOXY DAN SERAT DAUN NANAS TERHADAP KEKUATAN TARIK DAN IMPAK

Muhammad Alfarizi — 2022-02-22

Pineapple leaf fiber is one of the plantation wastes that is rarely processed and has a low selling value, Therefore, pineapple leaf fiber is used as a reinforcement for composite materials with an epoxy as a matrix and 16% filler material in the form of Hollow Glass Microsphere which is expected to produce renewable materials that can increase the selling value of the waste.. This study aims to determine how the effect of composite composition on tensile strength and impact of several parameters used. The testing process carried out is tensile test and charpy impact test with matrix and fiber volume fractions, namely, 74%:10%, 12.5%:71.5% and 15%:69% with horizontal and vertical fiber directions. Based on this study, specimens with a fiber fraction thickness of 15% with a vertical direction resulted in an average tensile strength of 84.83 MPa and the highest average impact strength was obtained in specimens with the same parameters is 0.1367 J/mm².

PENGARUH NYALA API PADA LAS OXY-ACETYLENE TERHADAP KEKUATAN IMPAK PADA PROSES BRAZING BAJA KARBON RENDAH

Muhammad Naufal — 2022-02-22

Brazing is a method of joining metal materials through a heating process using an adhesive or filler that has a lower melting point than the melting point of the material to be joined. Oxy-acetelyne welding is a manual welding process where the metal surface to be joined is heated until it melts by an acetylene gas flame through the combustion of C2H2 and O2 with or without filler metal where the joining process is without pressure. In this study using an experimental method. The purpose of this study was to determine the impact strength of low carbon steel after the brazing process with variations in flame and root gap. The variations of the flame used are oxidation flame, neutral flame and carburizing flame with a root gap of 0.4mm, 0.6mm, and 0.8mm. The material used in this research is mild steel St37. The added material used is 3mm diameter brass wire. From the research that has been carried out, it shows that the energy absorbed and the impact value on welding after calculation with the highest value on a neutral flame with a Root gap of 0.8 and the lowest value on a carburizing flame with a Root gap of 0.4.

STUDY KASUS NILAI KEKASARAN PERMUKAAN MATERIAL BAJA S45C PADA PROSES PEMESINAN CNC BUBUT

Riyo Mulyadi — 2022-02-22

In today highly sophisticated manufacturing industry, of course,the best product results are needed. Machining work, especially on CNC turning machining needs to be considered roughness level. The lower the roughness level, the better the workmanship will be. For this reason it is necessary to pay attention to the parameters used so that the roughness of the product is getting lower. This study aims to determine the best parameters. The machining process is carried out on the MORI SEIKI SL-25B/500 CNC turning and S45C material. Parameters used consist of feed motion, feed thickness, and spindle speed. The experimental design was based on the taguchimethod with an orthogonal L9(3³) matrix and 2 times of replication as a comparison, there was no significant deviation. From the research, the contribution of feeding motion is 49,734%, feeding thickness is 19,239%, and spindle speed is 7,334%. The smallest roughness in the MORI SEIKI SL25B/500 CNC turning machining process was obtained from setting the feed motion 0.2 mm/rev, feeding thickness 1 mm, and spindle speed 2000 rev/minute.

ALAT BANTU MOBILITAS TUNANETRA BERBASIS MICROCONTROLLER ARDUINO

Nurul Listi Komah — 2022-02-22

Not everyone has a normal eye condition, there are some people who have vision problems from birth, and some are caused by the person having an accident. To help with these problems, it is possible to design a tool for visually impaired people based on arduino nano that can facilitate the visually impaired to carry out daily activities. This tool will provide information in the form of distance of an obstacle in the form of sound and user location information, hc-SR04 ultrasonic sensor is used to detect obstacles or obstacles that provide sound output in the form of buzzers. As for location data using the 6m neo ublox gps module sent using the gsm sim 800l module.

SISTEM KONTROL KECEPATAN MOTOR DC MENGGUNAKAN PID PADA ROBOT PEMBAWA MAKANAN

Muhammad Ihsan Zuhdi — 2022-02-22

DC motors are the most commonly used actuators in both small and large scale industries. Dc motor speed often decreases due to several factors so that the speed becomes unstable, one of the factors of the speed of the DC motor is unstable is the presence of load. In this study, a PID control system was created to regulate the speed of the DC motor. The output of the PID control is PWM which later the PWM value will go to the motor driver. The process will continue to repeat until the output value is close to or equal to the setpoint value that has been determined. Determination of variable values Kp, Ki and Kd using the method of trial and error. These values that later affect the PID control process. Using PID controls, the dc motor can rotate more stablely. If the dc motor's speed is stable, it can reduce vibrations in the food delivery robot and reduce the impact at the start of the DC motor at the beginning. The result and conclusion of this study is that each RPM value we want has a different Value kp, Ki and Kd, for example for the value of RPM 200 then the value of Kp = 0.5 Ki = 0.75 and Kd = 0.03, while for the value of RPM 400 then the value of Kp = 0.3 Ki = 0.88 and Kd 0.002.

ANALISIS KONDISI MESIN PERKAKAS BUBUT BEMATO 1224BV DI LABORATORIUM POLMAN BABEL MENGGUNAKAN CONDITION BASED MONITORING

Noermala atika sari Tika — 2022-02-22

Bangka Belitung state manufacturing polytechnic is one of the public universities that there are many tooling machines. One of the tooling machines located in the babel polman laboratory is a bemato type 1224BV lathe tooling machine that will be researched with condition based monitoring methods. In this study, the authors have done data on the accuracy of geometry, checking the viscosity of lubricants, checking automatic feeding eaters and checking vibrations on spindles. In each of the studies that have been done on average has experienced irregularities. The results found in this study are deviations in geometric accuracy by 47%, viscosity that has passed ISO VG by 27%, eaters on automatic feeding by 33% and vibrations in spindles by 33%. The conclusion obtained in this study is the annihilation that occurs in lathes whether the deviations that have occurred in the tooling machine are too far from the permissible limit with the aim of establishing the tightening of the maintenance scheduling system on the lathe machine using the condition based monitoring method.

PENGARUH VOLUME FRAKSI SERAT TERHADAP KEKUATAN TARIK KOMPOSIT BERPENGUAT SERAT IJUK Ø 2 MM

Ledie Agussetiawan — 2022-02-22

This research was conducted to obtain data on the effect of the volume fraction of palm fiber on the tensile strength, modulus of elasticity and impact strength of composites using a 157 Ortho-phthalic Unsaturated Polyester matrix with the hand lay-up method. The object of this research is a composite of palm fiber 2 mm with a variation of fiber volume fraction 15%, 25%, 30%. The highest tensile stress of fiber-reinforced composite 2 mm was found in the volume fraction of 25% with a value of 30.23 MPa. Meanwhile, the highest value of modulus of elasticity is in the volume fraction of 25%, which is 9063.33 MPa. And for the highest impact strength, fiber-reinforced composite 2 mm is found in the volume fraction of 30% with a value of 49.3 Kj/mm². Meanwhile, the lowest tensile strength is found in the volume fraction of 15% with a value of 15.9 MPa. And the lowest elastic modulus value is found in the 15% volume fraction with a value of 7046.66 MPa. And for the lowest impact strength value is in the 25% fraction with a value of 29.73 Kj/mm².

PENGARUH VARIASI ARAH SERAT DAN FRAKSI VOLUME SERAT PANDAN DURI TERHADAP KEKUATAN TARIK DAN IMPAK SEBAGAI MATERIAL ALTERNATIF HELM SNI

Aditya Rachman — 2022-02-22

Pandan thorn with the term (Pandanus tectorius) is a bush plant with climbing stems and has a height of 11 m. This research was conducted to obtain data on the tensile strength and impact strength of pandan thorn fiber with variations in fiber direction and volume fraction. This research is expected to be useful for SNI helmet materials. The maximum value of tensile strength is 41.33 MPa in the vertical fiber direction and the fiber volume fraction is 12.5%. While the lowest tensile strength value is 8.44 MPa using horizontal fiber direction with a fiber volume fraction of 7.5%. The largest impact strength is 0.0616 J/mm² in the vertical direction of fiber with a fiber volume fraction of 12.5% and the smallest impact strength is 0.0216 J/mm² in the horizontal fiber direction with a fiber volume fraction of 7.5%. In this test, compared with the results of the tensile and impact strength testing of SNI helmets of 33.93 MPa and 0.00972 J/mm², the specimens passed the material test for SNI helmets.

RECEIVE SIGNAL STRENGTH INDICATOR (RSSI) PADA SWARM ROBOT UNTUK MENENTUKAN JARAK ANTARA ROBOT LEADER DAN ROBOT FOLLOWER

Sella Amril — 2022-02-22

Robot is a set of mechanical devices that are programmed in advance to perform a task either with human supervision or control. Robot development continues to be carried out, one of which is swarm robots. Swarm robots are robots that work together like a collection of insects to do a job. The swarm robot consists of a leader robot and a follower robot that must communicate with each other for positioning. The communication system uses two xbee modules to get the Receive Signal Strength Indicator (RSSI) value in determining the distance between robots so that the follower robot can follow the movement of the leader robot. The method used is to test the communication between xbees and the comparison of the RSSI value to distance. Based on the results of the tests carried out, the results showed that the two xbees communicated well with each other and the RSSI values obtained on the X-axis and Y-axis with the same distance did not change significantly.

ANALISIS PENGARUH TEMPERATUR DAN MEDIA PENDINGIN TERHADAP SIFAT KEKERASAN DAN KETANGGUHAN BAJA S45C PADA PISAU CRUSHER

Bagus Ilham Pramudya — 2022-02-22

The crusher blade is the part that is used to decompose plastic waste. The crusher blade needs to be worked on to change the mechanical properties of the material to maintain resistance, namely by working on the heat treatment process. In this study, the researcher used steel material with JIS S45C grade of medium steel. Researchers will vary the hardening temperature, namely 800°C, 840°C, 880°C with cooling media using salt water, oil, and sea water. then proceed with the tempering process with a temperature of 500°C. The tests in this research are hardness testing and toughness testing. The purpose of this study is to find the highest optimal value and find out which variables have the most influence on the results. From the results of hardness testing, the highest value is found in salt water with a temperature of 880°C at 36.86 HRC and for toughness testing which has the highest value is found in oil cooling medium with a temperature of 800°C at 1.2015 joule/, and of the two variables that have the most influence on the results of hardness and toughness testing, namely the cooling medium.

APLIKASI MONITORING SPI

Firizza — 2022-02-22

Technological developments are very influential in various aspects, one of which is the development of information. The increasing use and search for information in the mass media, makes programmers try to make an application that will help users to get and carry out information seeking activities easily. Difficulties in conveying information and not yet computerized are the main problems for SPI. With the creation of an application that can manage the existing data on the SPI Polman Negeri Babel, it can be better organized and the integrity and security of the data can be guaranteed. This application is made using the waterfall model in order to produce a systematic and sequential system design. In addition, making application designs using Use Case Diagrams and application testing using the blackbox method. The results of making this SPI monitoring application provide convenience in displaying information, activities, and complaint features related to SPI.

PENGARUH PARAMETER PROSES TERHADAP UJI IMPAK PADA 3D PRINTING MATERIAL ABS

Rully Febriansyah — 2022-02-22

Technology 3D printing is also known as Additive Layer Manufacturing. One of the most well-known 3D printing technologies is Fused Deposition Modelling (FDM). The working principle of FDM is by means of thermoplastic extrusion through the nozzle at the melting temperature then the product is printed perlapis layer. This research filament used is ABS (Acrylonitrile Butadiene Styrene) because mechanically this filament is very strong and has resistance to high temperatures, for the factors used namely Infill Layer Thickness, Printing Speed, Wall Thickness, Print Temperature, Bed Temperature, Fan Speed Wall Printing Speed, Infill Overlap, While in this study the method used is Taguchi and this study has the aim to get optimal process parameters on Printing impact tests were conducted with a 3D printing machine Creality Ender 3 printed as many as 81 specimens. Then the impact test was conducted so that the average score of the highest impact test result was in experiment number 27 with a value of 0.00392 joules and for the lowest impact test value was in experiment number 1 with a value of 0.00291 Joule.

SISTEM INFORMASI MANAJEMEN TOKO PERIKANAN IMA

Ratri Isnaini — 2022-02-22

Toko Perikanan IMA is a shop that is engaged in the sale of fishing equipment in Sungailiat city. To manage store data such as sales data and product stock, Toko Perikanan IMA still uses a manual check by making written in the administration book which makes the owner get difficult. In fact, by managing store data, the owner can choose and make the right decisions. Besides that, marketing and promotion in Toko Perikanan IMA are very restricted and doesn't optimal. Therefore, a management information system is needed to solve the problem of the owner shop. Honestly, with a management information system, can more expect to make it easier for owner shop to manage a store data, both sales data, product data, product stock data, etc. Besides that, is be able to present information about fisheries that is more up to date and can promote the store widely without space and time-limited. The method used in building this system is the waterfall method. This method is used so that the system can be structured and neatly organized. To make a system design the owner uses UML (Unified Modeling Language) and the programming languages used are PHP and MySQL.

PENGIRIMAN DATA MENGGUNAKAN NRFT24L01+LA+PA DENGAN JARAK 200M

ajie pangestu — 2022-02-22

Wireless Sensor Network (WSN) is a wireless network infrastructure that uses sensors to monitor physical or environmental conditions such as temperature, sound, vibration, electromagnetic waves, pressure, movement, and others. In this study, considerations were made in choosing the nrf24l01+LA+PA component, namely how far the data transmission distance was sent. The value measurement uses the mpu-6050 sensor as data sent via nrf24l01+LA+PA. With the accuracy of the values issued by the mpu-6050 sensor. In testing the tool using two scenarios so that there are differences in environmental conditions and the distance traveled.

PENGARUH VARIASI PARAMETER TERHADAP MATERIAL REMOVAL RATE DAN KEKASARAN PERMUKAAN STAINLESS STEEL 304 PADA PROSES CNC MILLING

Dimas putra utama — 2022-02-22

Large material removal rate and minimal surface roughness are the desired objectives in the CNC MORI SEIKI MV40–m process with the right process parameters to obtain a large material removal rate response and minimal surface roughness. The parameters used are cut speed, nutritional depth and spindle speed. The experimental design used based on the response surface methodology method in the form of a behnken design box. The experiment was randomized as many as 3 replications to produce more optimal results. The results showed that for parameters that contribute greatly to material removal rate and surface roughness is cutting speed and depth of cut. To obtain a large material removal rate, the cut speed is set at 143.28mm/min and the depth of cut is set at 0.25mm with a yield of 4.694mm3/minute. And to get the minimal surface roughness value, the cut speed is 118.05mm/min and the depth of cut is 0.15mm with a yield of 0.964 μm.

MOBILE MANIPULATOR ROBOT PADA KASUS PEMINDAH BARANG

Faradila Irianti — 2022-02-22

The industrial world really expects an increase in performance by utilizing and creating the latest technology. Robot arm is one type of robot that is often used to perform various tasks to replace humans in the industrial world. By collaborating the function of the arm and wheel, it will produce the ability to move goods more effectively and efficiently. With a line tracing system or line detection, the mobile manipulator robot will move along the existing line to get to the place where the object is picked up, then the robot arm will function to pick up and put the object back to its destination. The output of this research is a mobile manipulator robot which has a maximum range of 237mm on the X-axis, 237mm on the Y-axis, and 224mm on the Z-axis and success in getting to the workpiece location using a line follower system while the manipulator with 3 DOF can reach the servo angle. a maximum of 120 degrees on the waist, 180 degrees on the upper and lower arms, and can clamp the workpiece with a rotating angle of up to 360 degrees.

PENGARUH VARIASI FRAKSI VOLUME DAN LAMA PERLAKUAN NAOH PADA KOMPSIT BERPENGUAT SERAT TEBU DENGAN MATRIKS POLYESTER TERHADAP KEKUATAN TARIK DAN IMPACT

sayyid osama — 2022-02-22

Material development is expected to increase efficiency in the field of engineering, judging from the current good material is a material that meets several main standards such as composites. Composite is a material consisting of a mixture of two or more main elements, and composites have a light weight, high strength, corrosion resistance and cheaper price. Presearch aims to find out the effect of variations in volume fraction and length of difference in immersion ofsugarcane fiber using NaOH solution against tensile strength and impact, so that it can be used as potential information about fiber. Sugarcane that can produce a new quality material. The study used variations in volume fractions of 10%, 15% and 20% as well as the length of immersion using NaOH for 30, 60 and 90 minutes. From the tests that have been done, the highest average tensile test value is in the volume fraction of 15% and the length of NaOH treatment of 60 minutes is 36.73MPa and the lowest average value is in the volume fraction of 20% and the length of NaOH treatment is 90 minutes by 21.16 MPa. The maximum average value on the impact test is at a volume fraction of 20% and the length of naOH treatment of 60 minutes is 0.07290 joules / mm², and the average minimum value is in the volume fraction of 10% and the length of naOH treatment is 90 minutes by 0.02849 joules / mm².

PENGARUH VARIASI PARAMETER PROSES PEMBUBUTAN TERHADAP KEKASARAN PERMUKAAN PADA MATERIAL S45C

Muhammad Reza Mukhib — 2022-02-22

Lathes include one type of tooling machine, the working principle in the lathe process is the process of removing parts of the workpiece. The purpose of the study was to determine the effect of spindle rotation, dietary depth, and cooling media variations (Oli, dromus, air). The process of subsubsting uses the MAWItec D.O.O lathe.B 160x1000, and uses S45C material. This study uses the RSM method. Minimal research results in this study with variations in parameters spindle rotation 1000 RPM (factor 1 level 3), nutritional depth 0.7 (factor 2 level 2) and air conditioning media (3) (factor 3 level 3) with a resulting roughness value of 1,662 μm.

PENGARUH CHAMBER PADA MESIN 3D PRINTING FDM TEHADAP HASIL PRODUK DENGAN MENGGUNAKAN FILAMEN ABS

zailani hamzah — 2022-02-22

3D printing technology using the Fused Deposition Modeling (FDM) system is one of the manufacturing processes currently being developed. The rapid prototyping process makes it easier for academics in research. Acrylonitrile Butadiene Styrene (ABS) filament material is the type of material used in this research. The purpose of this study was to determine the effect of the use of the chamber on the 3D printing machine DIY (Do It Yourself) FDM type Cartesian ender model on the quality of product dimensional accuracy results. The method used in this research is experimental by using a chamber on a 3D printing machine and using process parameters. The results of the research by testing and measuring, it is found that the chamber affects the accuracy of the product dimensions with the heat bed temperature (80 ℃), nozzle temperature (230 ℃), print speed (40 mm/s), infill density (40%) and the use of layer thickness. (0.20 mm) shows a significant result of product dimensional accuracy.

ANALISIS UJI IMPAK PADA PENGELASAN BAJA ST37 MENGGUNAKAN LAS SHIELD METAL ARC WELDING (SMAW) DENGAN POSISI PENGELASAN 1G

Welcy Fratama — 2022-02-22

Welding is the process of joining two or more metal materials into a single unit in the presence of heat energy. SMAW (Shielded Metal Arc Welding) welding is the process of joining two or more materials using wrapped electrodes as heat energy to melt the material. In SMAW welding there is the use of layers and passes. In this study, welding with variations of pass will be carried out using SMAW welding on St37 steel with 1G welding position. The pass variations used in welding are 6 passes, 7 passes, and 8 passes. The electrodes used were 2.6 mm diameter E7016 and 3.2 mm diameter E7018 electrodes. To determine the impact of pass variations on the welding results, an impact test will be carried out. From the results of research that has been done that welding with a small number of passes has a better amount of energy than welding with a large number of passes. Likewise for the impact price, welding with a small number of passes has a better impact price than welding with a large number of passes.

PENGARUH BENTUK GERAM DENGAN MEMVARIASIKAN SUDUT POTONG PAHAT TERHADAP KEKASARAN PERMUKAAN MATERIAL S45C DENGAN MENGGUNAKAN MESIN BUBUT GEMINIS

Geril Satrio Ramadhan — 2022-02-22

Shaft is one of the materials that must have a low surface roughness value from the machining process, especially using the Tornos Geminis S.L semi-automatic lathe. The purpose of this study was to determine the effect of the furious form on the surface roughness of the S45C material. This study used factor variables that are thought to affect the shape and surface roughness of the S45C material, namely, the cutting angle of the chisel with a level (80^o, 82^o, 84^o), feeding depth with a level (0.4 mm, 0.6 mm, 0.8 mm) and Spindle rotation with levels (200 RPM, 280 RPM, 360 RPM). The lowest surface roughness value for the S45C material was obtained from the variation of the chisel cutting angle factor of 80º, infeed depth of 0.4 mm, and spindle rotation of 280 RPM with a surface roughness value of 5.171 . From the lowest value of surface roughness, a tubular growl (short) is produced.

PRESENSI DAN PEMINJAMAN BUKU POLITEKNIK MANUFAKTUR NEGERI BANGKA BELITUNG BERBASIS RFID (RADIO FREKUENSI IDENTIFICATION)

Triya Marlina — 2022-02-22

The presence and lending system of books is an important support of information management in the library. The system of presnance, lending, and return of books in polmanbabel library still uses a manual system. This research aims to be able to update the existing manual system in the Polmanbabel Library. RFID is a rapidly evolving technology, RFID technology has been widely used in data information management, one of which is in library information management. The appearance of the system of presence, lending, and return of books is designed using Visual Basic.Net.Visual software Basic.Net is an object-oriented computer programming language. Data collection is done by providing questionnaires to visitors who conduct sample trials from the system created. Based on the results of the test graph proves that the system designed to facilitate the process of Presence, Lending, and Return of books and able to improve service in the Library of Indonesia.

KEKUATAN TARIK DAN MODULUS ELASTISITAS BAHAN KOMPOSIT BERPENGUAT SERAT BAMBU DAN FILLER SERABUT KELAPA

Efata Anugrah Harita — 2022-02-22

ABSTRACT

The reason for conducting this review is to determine the effect of alkalization on the tensile strength and elasticity of composites of bamboo fiber and coconut fiber with a polyester matrix by varying the NaOH with concentrations of 0%, 2%, and 5%. Alkalization is one of the modifications of natural fibers to develop a compatible fiber-matrix. This exploration strategy uses the hand lay-up technique. In the main cycle, bamboo fiber and coconut fiber were treated without alkalization or 0% alkalization and in the next interaction, bamboo and coconut fiber were soaked in water (2% and 5% NaOH) for 2 hours. Then, at that time, each treatment process was formed into a composite according to the standard tensile test of ASTM D638 – II. The volume portion of bamboo fiber is 15%, coconut fiber is 15% and polyester resin is 70%, and the arrangement of bamboo fibers and coconut fibers is arranged horizontally. The matrix used in this study is a polyester resin matrix of type 157 BTQN with 1% MEKPO hardener. The highest concentration from this review showed that bamboo fiber and coconut fiber composites with NaOH variations of 0%, 2% and 5% respectively had tensile strengths of 34.9 MPa, 34.9 MPa and 54.74 MPa. The highest concentration with 5% NaOH produced the highest tensile strength of 54.74 MPa, while the coconut fiber composite without alkalization had the lowest tensile strength of 34.9 MPa.

SISTEM INFORMASI PERUMDA AIR MINUM TIRTA BANGKA BERBASIS WEBSITE

Tirza Rosari — 2022-02-22

Perumda Air Minum Tirta Bangka is a Regional Owned Enterprise (BUMD) of Bangka Regency that provides clean water services to all its customers. The services provided to the community are still conventional, where people who want to apply for the installation of new connections and customers submit complaints can only go directly to the office on weekdays. Submission of information regarding the obstacles that cause air not to reach the customer's house is also ineffective so that the problem is rarely known by the customer. Based on the problems that have been described, a research will be carried out which aims to design a Webiste-Based Information System for Perumda Air Minum Tirta Bangka. Methods of data collection in this study using the method of observation and interviews. For the design method using the waterfall method, which consists of stages of analysis, design, code and testing. The existence of this information system, hope it can help service between customers and the company to making it easier for customers to get information, apply for new connections and submit complaints they experience.

ANALISIS UJI BENDING PADA PENGELASAN BAJA ST37 MENGGUNAKAN LAS SMAW (SHIELD METAL ARC WELDING) DENGAN POSISI PENGELASAN 1G

Rahmat Maulid — 2022-02-22

The welding process is the process of joining two or more metal materials in one unit in the presence of heat energy, the heat energy generated from the welding process can affect the results of the weld. In this study, the parameters used are variations in welding current and the number of layers and passes, the welding current used is 65A penetration, 95A fill-capping, 65A penetration, 115A fill-capping, 65A penetration, 125A fill-capping and the number of layers and passes required. used are 4 layer 7 pass and 4 layer 9 pass with DCEP (Direct Current Electrode Positive) polarity. In this study, a bending test analysis was carried out on ST37 steel welding using SMAW (Shield Metal Arc Welding) welding with a welding position of 1G. The purpose of this study was to determine the compressive strength of ST37 steel after the SMAW welding process with bending testing. The method used in the bending test uses the three point bending method. From the results of the bending test, the highest compressive load strength occurred at a welding current of 65A penetration, 125A fill-capping with 4 layers 7 passes, with a suppression load of 75.8kg.

PENGARUH PANJANG SERAT DAN FRAKSI VOLUME TERHADAP SIFAT MEKANIK KOMPOSIT BERPENGUAT SERAT PANDAN DURI

Muhammad Nurdiansyah — 2022-02-22

The development of polymer composite materials using natural fibers as a reinforcing medium is something that is necessary because it has many advantages. The study aimed to find out the values of tensile strength, modulus elasticity and optimum bending strength against fiber lengths of 60 mm, 80 mm, 100 mm and volume fractions of 5%, 10% and 15%. The highest tensile voltage is found at a fiber length of 100 mm with a fiber volume fraction of 15% which is 31.3 MPa,while the modulus elasticity of the highest tensile strength is found at a fiber length of 100 mm with a 15% seat volume fraction of 7150 Mpa. For the highest bending strength is found at a fiber length of 100 mm with a fiber volume fraction of 15% which is 66.8 MPa. And modulus values of strong elasticity bending with a fiber length of 100 mm with a fiber volume fraction of 15% 11500 MPa.

PENGUJIAN TEG SP1848 SEBAGAI PEMBANGKIT LISTRIK DENGAN SISI PANAS MENGGUNAKAN SETRIKA BERTEMPERATUR 75°C

catur arief wijaksono — 2022-02-22

Thermoelectric Generator (TEG) is a technology that can convert heat energy into electrical energy directly due to the difference in temperature between the hot side and cold side of the thermoelectric module, known as the Seebeck effect. This study uses a thermoelectric module of the SP 1848 type. An aluminum plate is used as a medium for absorbing heat from a simulated iron temperature with a maximum temperature of 75°C, while the cold side of the thermoelectric module uses a heatsink with a temperature of 33°C and a fan. From the tests carried out, the maximum voltage produced when two TEG modules are connected in series is 1.65 Volt with a temperature difference of 43.13°C. The maximum current generated when two TEG modules are connected in parallel is 3.52 Ampere with a temperature difference of 42°C.

PENGARUH PARAMETER PROSES 3D PRINTING TERHADAP AKURASI DIMENSI FILAMENT PETG(Polyethylene terephthalate Gylacol)

Mawar Lestari — 2022-02-22

3D printing is a manufacturing technology that is widely developed to make prototypes in accordance with the desired design, one of which is FDM (Fused Deposition Modeling). FDM technology is a printing technique used to print products using fibrous materials, some filaments that are often used in 3D printing including polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), nylon, polyethylene terephthalate glycol (PETG) and polycarbonate (PC). This research aims to get the parameters that most affect the print of FDM 3D printing machines. In this study to print the filament test object used petg filament (Polyethylene terephthalate Gylacol) and using taguchi L_{27 OA} method. The parameters used are Nozzel Temperature, Bed Temperature, Flowrate, Prin Speed, Layer Thiknes, Infill Overlap, Infill Density, and Infill Speed. The results of the study that has been done showed that the most influential parameters for the height of specimens are research no. 4 and 11 with a value of 19.99 while the lowest value is at number 26 with a value of 19.73 mm. And the most influential process parameters in a row are Nozzel Temperature (235°C), Bed Temperature (100°C), Infill Density (25%), Infill Overlap (10%), Layer Thickness (30mm), Printing Speed (40mm/s), Infill Speed (40mm/s), Flowrate (90%).

ANALISIS PENYAMBUNGAN LAS GTAW(GAS TUNGSTEN ARC WELDING)/TIG MENGGUNAKAN MESIN LAS SMAW (SHIELDED METAL ARC WELDING) DENGAN DYE PENETRANT TEST

Firdiansyah Candra — 2022-02-22

Welding itself is a technique of joining metal with some of the parent metal and filler metal, which can be used as an addition metal or not and produces a continuous metal. Gas Tungsten Arc Welding (GTAW) or often also called Tungsten Inert Gas (TIG) is used. one of the forms of electric arc welding (Arc Welding) that uses an inert gas as a shield with tungsten or tungsten as the electrode, SMAW welding machine is a welding machine that uses DC, AC, or DC/AC currents. The purpose of this final project is to find out whether GTAW welding can be done using a SMAW welding machine because the SMAW welding machine has an easy machine setting process and relatively affordable machine prices with clean results from slag and can also weld thin plates with maximum results using welding. GTAW. The results of this study are information about the success or failure of the GTAW welding process using a SMAW welding machine. The amperes used are 43,46,49,52,55,58 and 61 as well as testing the welding results using dye penetrant. The conclusion obtained in this study is that GTAW welding can be done using a SMAW welding machine. And it was also found that the second welding using alternating welding method I was better than welding 1 by unidirectional welding using I seam.

PENGARUH VARIASI WAKTU GESEK PADA PENGELASAN GESEK (FRICTION WELDING) TERHADAP KEKUATAN IMPAK BAJA ST37

Ardi Meilianto — 2022-02-22

Friction welding is a method of reasoning that is carried out to obtain welds by rubbing the ends of two workpieces. so that the contact surface will be hot, and the metal surface in the area becomes liquid. In these hot conditions, the friction between the two metals is stopped, resulting in a welded joint. The purpose of this study was to determine the effect of variations in friction time on the impact strength of the friction welding process on ST37 steel. ST37 steel used is a solid cylinder with a diameter of 13mm. This study uses an experimental method, with variations in the friction time of 4 minutes, 5 minutes. and 6 minutes with a speed of 720 rpm, and a distance of 3 mm pressing. From this research, it was found that welding with a friction time of 6 minutes produced the highest value for the absorbed energy of 49.73 joules, and for the impact value of 1.740 joules/mm², while the lowest value was at a friction time of 4 minutes with the energy values being absorbed is 32.03 joules, and the impact price is 1.119 joules/mm².

APLIKASI SISTEM INFORMASI PENJADWALAN LABORATORIUM (STUDI KASUS LABORATORIUM TRPL)

Olipio Sayudias — 2022-02-22

The laboratory scheduling system in an educational institution is a very crucial thing to pay attention to. The practicum scheduling process at the Software Engineering Technology Laboratory (TRPL) of the Bangka Belitung State Manufacturing Polytechnic is carried out every semester and is a complicated thing to do manually. This study discusses the design of a laboratory scheduling information system application which is a solution to this problem. In designing this application using the waterfall method (waterfall) development model that emphasizes sequential and systematic phases. In addition, this system also applies the concept of genetic algorithms to assist in scheduling problems that are not yet computerized and the best solution can be found using genetic operators (selection, crossover, and mutation).

ANALISIS KEKASARAN PERMUKAAN BAJA SKD-11 PADA PROSES CNC TURNING MENGGUNAKAN METODE TAGUCHI

Rabinaswil Samuel Napitupulu — 2022-02-22

The machining process achieved with a CNC–Turning type SL25 B/500 based on the minimum surface roughness value, the reason for setting the variables smooth but contrary to the processing time because the longer the machining, the smoother the results. On the other hand, the longer the machining process, the more the costs involved. The research that has been conducted aims to determine the contribution of the CNC Turning process variables type SL-25 B/500 to reduce variations in the response of the workpiece surface roughness. This research also wants to achieve the suitable setting of the work variable of the SL-25 B/500 CNC turning machine to obtain the minimum (smaller is better) using a surfafe roughness test tool. The work variable that we want to work on are spindle rotation, feeding depth, and feeding motion. We determined the experiment design based on the Taguchi method and an orthogonal L18 matrix (2¹x 3⁷). Then to avoid interference, replication was carried out 2 times. This research proves the precise and accurate combination of work variable parameter settings to achieve the minimum surface roughness are spindle rotation of 640 put/min, feeding depth of 1 mm, and feeding motion of 0.05 mm/rev. The average of the surface roughness using the initial settings in the 16th combination experiment is 1,362 m.

OPTIMASI PARAMETER PROSES 3D PRINTING TERHADAP KEKUATAN TARIK FILAMENT POLYETHYLENE TEREPHTHALET GLYCOL

Rovi Avriansah — 2022-02-22

3D printing technology is the latest technology in the field of Additive layer manufacturing (AM). One of the AM that is currently being developed is Rapid Prototyping (RP) based on FDM, the FDM type uses polymer melted by heating then extruded through a nozzle as ink and deposited on the printer table to produce 3D objects layer by layer (layer by layer). In this research, the filament used is PETG (Polyethylene terephthalate Glycol) filament. In this study, the taguchi L9 () OA method was used. This study aims to determine the effect of the process parameters used in tensile testing in accordance with the process parameters used, namely Nozzel Temperature, Bed Temperature, Wall Thicknes, and Infill Speed. The results showed that the parameters that greatly influenced the tensile test using PETG filament were Bed Temperature (70°C), Nozzle Temperature (230°C), Wall Thickness (0.8 mm), and Infill Speed (40 mm/s).

PENGARUH FRAKSI VOLUME DAN VARIASI PERENDAMAN NaOH TERHADAP KEKUATAN TARIK DAN IMPAK KOMPOSIT BERPENGUAT SERAT AMPAS TEBU

Aden Sanjaya — 2022-02-22

This study aims to determine the effect of the duration of immersion of NaOH and the optimal volume fraction of bagasse fiber on tensile strength and impact strength by using Polyester Resin using hand lay-up composite molding method. The object of research is bagasse fiber composites with variations in NaOH immersion and volume fraction. The highest tensile strength in the composite fiber immersion variation for 2 hours with a volume fraction of 15% is 22.3 MPa. Meanwhile, for tilapia the highest impact strength was in the 2-hour fiber immersion variation with 5% bagasse fiber volume fraction of 0.272 J/mm². Meanwhile, the lowest tensile strength is found in the 5% volume fraction, which is 12.8 MPa. And for the lowest strength impact test value in the 15% fraction, which is 0.0113 J/mm².

PENGARUH FRAKSI VOLUME TERHADAP KEKUATAN MEKANIK PADA KOMPOSIT BERPENGUAT SERAT POHON TERAP MENGGUNAKAN RESIN POLYSTER BQTN-157

Abdullah hamid — 2022-02-22

Composite is a system composed by mixing two or more different materials, in form and composition. Between two or more materials are insoluble in each other. Composites are very influential on the mechanical properties. The most influential factors are fiber fraction, fiber length and immersion used. This study aims to examine the effect of volume fraction variations on the mechanical properties of applied tree bark fiber reinforced composites. This study used matrix and fiber volume fraction 5% : 95%, 6% : 94%, 7% : 93% with 5% NaOH for 2 hours. The material used is fiber. Applied tree bark. Composites are made using the hand lay up method. The tests carried out were tensile test and Impact Charpy test with ASTM D638 Type 1 tensile test standard and ISO-179 impact test. The result of the highest tensile strength at 7% volume fraction that is equal to 36.32 Mpa. While the results of the smallest tensile strength at 5% volume fraction that is equal to 28.74 Mpa. And the results of the highest composite impact test at 7% volume fraction that is 0.051198 Joul/mm2. Meanwhile, the lowest impact strength was at 5% volume fraction with a value of 0.009652 Joul/mm2.

STUDI EKSPERIMEN PENGARUH SUHU HARDENING DENGAN QUENCHING MEDIA AIR LAUT TERHADAP KETANGGUHAN BAJA ST 60

Abdillah Halim — 2022-02-22

ST 60 steel is a medium carbon steel that is often used in machine construction such as shafts and shipbuilding, but impact loads often occur. The purpose of this study was to determine the best toughness of st60 steel from the effect of temperature on the hardening process. The method used for data processing in this study is the two way ANOVA method without interaction. The variables used in this study were temperature (900, 930, 950⁰C) and holding time (30, 60, 90 minutes). The best toughness results were obtained at a temperature of 900⁰C with a holding time of 30 minutes (2.5934 J/mm²) with the lowest toughness results were obtained at a temperature of 950⁰C and a holding time of 90 minutes was obtained at (2.5588 J/mm²).

ANALISIS KEKUATAN MATERIAL KOMPOSIT KOMPOSISI HGM & EPOXY DENGAN PENGUAT SERAT ALAM SEBAGAI BAHAN ALTERNATIF PELINDUNG TOE CAP SEPATU SAFETY

Rendyatama Aprila — 2022-02-22

Composite is the process of mixing or combining two or more materials where the two materials have different properties, the results of the mixture can be referred to as (composite materials). The purpose of this research was to make composite specimens made from epoxy resin, Hgm, balsa wood fiber as natural reinforcement and carried out impact and tensile tests to determine whether the strength of the composite could be an alternative as a substitute for protective Toe caps for safety shoes. The balsa wood used in the tensile test specimen is in the form of sticks with a length of 16cm and a thickness of 3mm which has 3 test parameters, namely 1 balsa stick, 2 balsa sticks, and 3 balsa sticks. As for the impact test, 1 stick of balsa stick with a length of 7.5 cm and a thickness of 3 mm.

Keywords: Composite, Balsa wood, Hgm, Epoxy, Impact and Tensile

ANALISIS VARIASI PARAMETER PROSES PERMESINAN TERHADAP TINGKAT KEKASARAN PERMUKAAN MATERIAL SKD 11 DENGAN MENGGUNAKAN MESIN BUBUT GEMINIS

Rizki Fachrezi — 2022-02-22

The success of the world's manufacturing industry to improve production processes is strongly influenced by the production machine tools used. Shaft is a product that requires a low surface roughness value during lathe processing, especially the Tornos Geminis S.L. semi-automatic lathe. The purpose of this study was to determine the surface roughness of carbon steel. This study uses parameters that affect the shape of the surface roughness value of the SKD11 material, namely the spindle rotation rate (1000 Rpm, 760 Rpm, 610 Rpm), feed depth level (0.4 mm, 0.6 mm, 0.8 mm)) and feeding speed. (0.8mm)/put, 0.9mm/put, 0.10mm/put). The lowest value of surface roughness of the Skd 11 material was obtained with a spindle speed of 1000 Rpm, feed rate of 0.9 mm/put and depth of cut 0.4 mm, and a surface roughness value of 1.636 m.

ANALISIS PENGARUH SERAT DAUN NANAS TERHADAP SIFAT MEKANIK PADA MATRIK POLYESTER DENGAN JENIS DAUN NANAS SMOOTH CAYENNE

Ilham Setyadi — 2022-02-22

Composite materials are new types of engineering materials consisting of two or more materials whose properties of each material differ from each. Thisresearch is done to assess theinfluence of the volume fraction of pineapple leaf fibers on tensile strength, modulus elasticity and composite impact strength using polyester matrix BQTN 157 with hand lay-up method withresearchojek in the form of pineapple leaf fiber composite with a immersion time of 2 hours and with NaOH 5% with variations in fiber volume fraction of 15%, 20%,%, 25%.%. Thehighest tensile strength K is found in the volume fraction of 25% with a tensile test strength value of 84.4 Mpa and the lowest tensile test strength is at a volume fraction of 15% with a tensile test strength value of 58.7 Mpa.. As for the highest elasticity modulus value is at a volume fraction of 25% which is 17933 Mpa and the lowest tensile test strength is at a volume fraction of 15% with a tensile test strength value of 16400 Mpa.. And for the highest impact strength composite with pineapple leaf fiber is found at a volume fraction of 25% with an average impact power value of 163.2 Kj / mm²and the lowest impact strength value is in the fiber fraction of 15% with an average impact power value of 63.9 Kj / mm².

ANALISA KEKASARAN PERMUKAAN PROSES BOR BAJA SKD 11 PADA MESIN CNC

Pajar Juliansah — 2022-02-22

The best quality of a component is a smooth surface. To achieve an optimum response, the variable setting of the process must be correct to be effective. SKD 11 steel includes the kind of tool steel that is frequently applied in the manufacturing industry as cutting tools, shear blades, stamping tools, punching, dies, and so on. Therefore, it is expected to have good surface roughness. This research will use a combination of variables to process spindle, feed rate, and cooling. The method used was experimental methods with tuning parameters. Based on research shows the most optimum gross response value was the 1600 RPM index, the rate of 120 mm per minute, and the cooling type of dramas. Variables that contribute significantly to the total variance of rudeness are the feed rate of 67.43 %.

ANALISA NILAI KEKASARAN PERMUKAAN MATERIAL BAJA AISI 4340 PADA PROSES PERMESINAN BUBUT CNC DENGAN METODE TAGUCHI

Ariandi_saputra — 2022-02-22

The results of the minimum surface roughness in the MORI SEIKI SL-25 CNC machining process, the parameters of the MORI SEIKI SL-25 CNC machining process are adjusted in order to obtain a minimum workpiece surface roughness reaction. The research that has been tried aims to ensure the contribution of the CNC MORI SEIKI SL-25 machining process parameters to reduce the alteration of the workpiece surface roughness reaction simultaneously. As well as setting the right parameters of the CNC MORI SEIKI SL-25 machining process parameters in order to obtain a minimum workpiece surface roughness. The machining process parameters that were varied were cutting speed, feed depth and feed motion. The experimental design was inaugurated based on the Taguchi method and in the form of an orthogonal matrix L9 (33). The analysis used is Taguchi. Experiments were carried out randomly with 3 replications to overcome the obstacles that occurred during the machining process. The research results show that to reduce the alteration of the response simultaneously, the cutting speed has a value of 61.98%, the depth of feed has a value of 16.28%. And eating motion has the smallest value of -12.45%. To obtain a minimum workpiece surface roughness on AISI 4340 steel with the MORI SEIKI SL-25 CNC machining process, the cutting speed is set at 130 m/min, the feed depth is set at 1.0 mm and the feed motion is set at 0.55 mm/put.

PENGARUH VARIASI PARAMETER PENGELASAN TERHADAP KEKUATAN SAMBUNGAN HASIL FRICTION WELDING PADA BAJA ST.41

Picki Ilham — 2022-02-22

Friction welding is a type of welding that connects two materials with the heat generated by the material itself so that it does not require additional materials. Heat can occur due to the presence of two objects rubbing against each other so that the material can melt and there is a connection due to forging process. The purpose of this study was to determine the impact strength of friction welding joints. The material used in this research is low carbon steel St.41 in the form of of a solid cylinder which has a diameter of 13mm. From the research that has been done, it is found that friction welding using 720 and 1000 rpm have better joint strength than using 450 rpm, which means that specimens with 720 and 1000 rpm have a higher amount of energy absorbed and impact values than specimens using 450 rpm.

PENGARUH VARIASI LAPISAN (1-3) ANYAMAN SERAT TERHADAP KEKUATAN TARIK DAN IMPAK KOMPOSIT RESIN BERPENGUAT SERAT RESAM

arbi syahrian — 2022-02-22

Resam (Dicranopteris linearis syn. Gleichenia linearis) can be used as an alternative raw material. This material is easy to obtain because it can be used in almost all corners of Indonesia, especially the Bangka Belitung area, is easy to process, and has a size of stem content and stem size. Has good mechanical properties, corrosion resistance, easy to obtain from nature and environmentally friendly raw materials. So it can be developed as a composite material. This study aims to determine the effect of variations in layers (1-3) of woven fibers on the tensile strength and impact of resin-reinforced composites. In this study, using variations in the number of different layers, namely 1 layer, 2 layer, and 3 layer. The material used is resam woven fiber resin. Tensile test specimens were made with reference to the ASTM D-638 standard and impact testing according to ISO-179. The research results show,. The highest tensile strength value is found in the 1-layer layer, which is 26.4 MPa and the highest impact strength is owned by the 3-layer composite, which is 0.09014 J/mm2. Based on the results of the comparison test, the number of fiber layers greatly affects the tensile and impact strength.

ANALISA NILAI KEKASARAN PERMUKAAN MATERIAL BAJA ST 41 PADA PROSES PEMESINAN BUBUT CNC DENGAN METODE TAGUCHI

ibnu salikin — 2022-02-22

The machining process used in the production process is a machining process that must be in accordance with the demands of the production. Where the level of precision, accuracy, quality and quantity of a product is the main thing in the machining process. to obtain a minimum response to the surface roughness of the workpiece. The research that has been tried aims to ensure the contribution of the parameters to the CNC MORI SEIKI SL-25 machining process to reduce the alteration of the workpiece surface roughness reaction simultaneously. As well as setting the right parameters of the CNC MORI SEIKI SL-25 machining process parameters in order to obtain a minimum workpiece surface roughness. The machining process parameters that were varied were cutting speed, feed depth and feed motion. The purpose of this study was to determine the surface roughness of carbon steel. This study uses parameters that affect the shape of the surface roughness value of St 41 material, namely cutting speed (110 m/min, 120 m/min, 150 m/min), depth level (0.5 mm, 0.8 mm, 1 mm)) and feeding speed (0.15mm/put, 0.925mm/put, 0.35mm/put). The value of the surface roughness of the St 41y material, which is the percent cutting speed, has a value of 11.06%, the infeed depth has a value of 0.19%. And eating motion has the smallest value of -20.97%.

APLIKASI INFORMASI FASILITAS PELAYANAN KESEHATAN BERBASIS ANDROID DI WILAYAH KABUPATEN BANGKA

Nur Risqinawati — 2022-02-22

Information on existing health service facilities in Bangka Regency is still inadequate due to the absence of an information system or application that provides information about existing health service facilities in Bangka Regency. Therefore, a means of disseminating information is needed to make it easier for the public to obtain information about the location and available health care facilities. So that in this study an Android-based application was designed which aims to provide location information and health service facilities. In this study, data collection was carried out by taking data from every service facility in Bangka district. This application is made using the waterfall method or waterfall diagram. The literature study that supports the design of this application development uses UML. While the software used to build this application is Android Studio 4.22. The results of this study are expected to assist the community in providing information about locations, routes that can be passed, and health services found in each health service unit.

OPTIMASI PARAMETER PROSES 3D PRINTING TERHADAP KEKUATAN TARIK FILAMENT ABS MENGGUNAKAN METODE TAGUCHI

Reza Dwi Putra Putra — 2022-02-22

3D printing technology is a technique that uses a material filling method to print products, which is usually called the Additive manufacturing technique. This technique has often been used in various industrial fields, including construction, health, and prototyping. Making 3D printing is what is sought to replace metal materials. Of the many 3D printing technologies, the most frequently used is Fused Deposition Modeling (FDM). The workings of the FDM machine is by means of thermoplastic extrusion through a hot nozzle at a melting temperature, then the manufacture is made layer by layer to form a product. The purpose of this research is to optimize the parameters of the 3D printing process using ABS filament for tensile strength using the Taguchi L9 OA method. The various process parameters that will be used in this research are Nozzle temperature °C, Bed temperature °C, Layer Height mm. that the optimal process parameter values for the tensile strength of ABS filament are Nozzle Temperature 245°C, Layer Height 0.20 mm, Bed Temperature 90°C.

SISTEM MANEJEMEN PENJUALAN TOKO OMEGA BERBASIS WEB

habibi habibi — 2022-02-22

Omega is a specialty food distributor shop, namely Getas which is located in Belitung. Manual buying and selling activities and marketing and promotions are still limited for that we need an information system that can expand marketing and facilitate transactions, making it more efficient, fast and easy without being hindered by distance and time. There really needs to be convenience in service to make it easier for customers who are far from reach. The purpose of this research is to build a web-based omega store sales information and management system. For this reason, a web-based omge sales system was created, known as E-commerce (Electronic Commer). This application makes it easier for customers to buy products in the Omega store online anytime and anywhere without taking time and customers can also find out what products are available at the Omega store. The use of the website is expected to expand the reach of product marketing without being limited by time so that it can increase sales

ANALISIS MATERIAL REMOVAL RATE (MRR) BAJA SKD 11 PADA PROSES CNC TURNING DENGAN MENGGUNAKAN METODE TAGUCHI

Jekki Dodi Parlindungan Sihombing — 2022-02-22

High MRR is a target to be achieved in the workpiece process using CNC turning. However, a slow process will affect the processing time of the product, and will increase production costs. To overcome this, it is necessary to set the right process parameters to produce the most influential contribution to the MRR and also to produce the maximum parameter value. The purpose of this research is to determine the effect of parameters (cutting speed, spindle speed and depth of cut) on the MRR and to determine the proper setting of process parameters in order to produce the maximum MRR for SKD-11 steel. The experimental design used is the L₁₈ (2¹ x 3⁷) orthogonal matrix. The repetition was done twice. From the results of the study, the MRR of the workpiece by using a combination variable setting that has the maximum value occurred in the 2nd combination experiment, with a value of 4.648 mm³/minute. With Spindle Rotation set at 210 put/min, feed depth set at 1.5 mm, feed motion set at 0.05 mm/rev.

ANALISIS PROSES PRODUKSI BATA RINGAN DENGAN RESPON SURFACE METHODE

Sahril Mashuri Ihsan — 2022-02-22

Light brick is a building material that is still quite foreign among the middle to lower society, the composition of light brick building materials is still quite interesting to research. In some previous studies, attempts to find the optimum composition of light brick mixtures used experimental methods that evaluated the influence of a factor in an experiment. The outcome of a production process can be influenced by a variety of factors. In this study was conducted to find the optimum composition of light brick building materials by applying the Response Surface Methode method. Research shows that the proportion of materials that produce the most optimal water absorption is rice husk (8.5%) and foam agent (0.9%), which is able to produce light bricks with an average water absorption of 50.22%.The results of this study also recommend a general equation to predict the absorption of light brick water when using both compositions of the material, namely: Y = 43,206 - 2.119X_1 - 1,228 X_2 - 8,479 x_1^2 – 2,264 x_2^2 - 13.785X_1 X_2 with X_1 and X_2 respectively is the proportion of rice husks and foam agents, respectively.

IMPLEMENTASI DAN ANALISA KINERJA SISTEM UJI PADA RANCANGAN ALAT UJI PENETRASI STANDAR SNI 1811-2007

Eril Kapri — 2022-02-22

Requirements so that the product can be declared passed and standardized. One of the tests carried out is penetration testing, this test is carried out to determine the mechanical properties of the material being tested. In this research, a test instrument is made for penetration testing, where in this test it can be known directly, what happens to the material being tested when a sharp object is punctured or an impact with a sharp object occurs. The penetration tester identifier is made in the form of a cylinder with a PVC guide pipe with a size of 1 inches. To determine the accuracy of the test equipment, the indenter is dropped on the test material from a certain height, namely 160 cm, for the data collection process by marking the indentation marks and visually observing them. For the indenter material used 4340 aisi steel because the steel can be hardened to a hardness of 50 HRC. In the penetration test equipment there are forces acting. The force is that the indenter has a gravity of 30.9 joules. And the potential energy when the identor falls from a height of 1.6 m is 49.44 joules. And the velocity of the identor when it falls is 5.6 m/s.

OPTIMASI FAKTOR PROSES PEMBUATAN KOMPOSIT SEMEN/PLASTIK/FOAM DENGAN METODE GRAY-ROBUST DESIGN

Muhamad Fajri — 2022-02-22

Technology in the field of konstruki continues to grow every day. One of the technological developments in the field of construction is material innovation in the manufacture of light bricks. Light bricks are cement and sand, but today's light brick making uses increasingly complex mixed materials. The manufacture of light brick is also one of the material innovations that are trending because it can recycle unused materials again such as plastic waste, the rest of clothes that are no longer used, rice husks, and foam agents. Plastic fibers are commonly used as toy-making materials, which have the potential to be used as a plus material in light bricks. This study used foam agent, plastic, and cement materials. With gray-robust design. The purpose of this study is to know the optimum value in light bricks from water absorption testing, heat absorptio and compressive strength that have optimal values. The result of the pene.

REKONDISI SISTEM VERTICAL MOVEMENT PADA MESIN PRECISION UNIVERSAL AND TOOL & CUTTER GRINDER TYPE JUNGNER US-350

Zika Lorika — 2022-02-22

This study aims to recondition the vertical movement system of the Precision Universal and Tool & Cutter Grinder Jungner US-350 to restore the optimal functionality of the vertical head. The machine experienced failures in the threaded bushing, timing belt, and flat belt, affecting the cutting tool grinding process. The research applied an experimental approach, including data collection through technician interviews, visual inspection, and machine manual review, fault identification using the 5 Whys method, and repair or replacement of critical components according to technical specifications. Functional testing demonstrated smooth vertical movement, stable timing and flat belt operation, and machine performance meeting precision standards. The study shows that structured reconditioning is an effective solution for restoring the functionality of aging precision machines with limited spare parts, while providing practical guidance for maintenance and care of similar machines.