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Jurnal Teknik Mesin
ISSN : 18298958     EISSN : 26555670     DOI : -
Jurnal Teknik Mesin adalah sebuah jurnal peer review yang didedikasikan untuk publikasi hasil penelitian yang berkualitas dalam bidang teknik mesin.
Arjuna Subject : -
Articles 32 Documents
Optimasi Sistem Informasi Penjadwalan Kuliah Berbasis Heuristic Search yang Dikombinasikan dengan Teknik Smart Back Tracking dan Look Ahead (Studi Kasus pada STMI –Kementerian Perindustrian) Trisanto, Dedy; Agus, Muhamad
Jurnal Teknik Mesin Vol 9 No 1 (2012)
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.9.1.23

Abstract

Scheduling lecture is scheduled number of components consisting of courses, lecturer, students, classrooms, and time with a number of restrictions and requirements (constraints) certain to get optimal results and the best. In this paper will be discussed and created scheduling lecture with a problem-solving approach to the science of Artificial Intelligence (Artificial Intelligence), by using an approximation of the mathematical problem that is aiming to find a situation or object that meets a number of requirements or specific criteria (Constraint Satisfaction Problem) to get the optimal scheduling and the best. To solve these problems the solution search techniques used by an algorithm that will result in optimal scheduling and the best (heuristic search) techniques combined with Smart Backtracking and Look Ahead called Intelligent Search to find and resolve problems when encountered a condition where no there is a solution in due course scheduling constraints and requirements are not met (deadlock). The application of these methods and techniques in the course scheduling information system is built, using the PHP programming language and MySQL database to solve the problem of scheduling to get optimal results and the best.
Introduksi Incubator Buatan Untuk Mempersingkat Waktu Pembuatan Dadih Amri, Khairul; Putra, Aronald Arif
Jurnal Teknik Mesin Vol 9 No 1 (2012)
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.9.1.22

Abstract

Dadih merupakan produk makanan fermentasi khas Sumatera Barat yang diproduksi dengan cara menyimpan susu kerbau di dalam tabung bambu dan membiarkannya selama 2-3 hari sehingga terjadi proses fermentasi yang dilakukan bakteri asam laktat yang berasal dari tabung bambu atau daun pisang atau dari susu itu sendiri, sehingga menghasilkan tekstur yang padat dan mempunyai rasa asam yang spesifik serta memiliki sifat fisikokimia yang sama dengan susu fermentasi seperti yogurt. Tujuan dari penelitian yang dilakukan adalah perancangan dan pembuatan alat incubator untuk mempersingkat waktu pembuatan dadih. Metoda kerja incubator  adalah  dilengkapi alat control temperature beserta pewaktu dimana suhu ruang incubator akan dijaga konstan pada range suhu optimal yang dibutuhkan oleh bakteri asam laktat untuk berkembang. Disisi lain, pewaktu digunakan sebagai pengingat dan pemberi informasi bagi petani Dadiah bahwa dadiah yang dibuat terlah terbentuk dengan sempurna. Dari hasil pengujian daidapat control temperature dan pewaktu yang dibuat pada alat incubator dadiah dapat bekerja dengan baik dan sesuai dengan alat ukur standar; stopwatch untuk waktu dan thermometer digital untuk temperature. Sesuai dengan teori yang dijelaskan oleh Lee and Lucey, (2010) bahwa bakteri asam laktat berkembang dengan cepat pada suhu 40 0C, ini terlihat dari proses pembuatan dadiah yang hanya butuh waktu 5 jam, dibandingkan dengan proses tradisional yang memerlukan waktu selama 50 jam.
RANCANG BANGUN MESIN AMPLAS DENGAN SISTEM MEKANIS BELT Ikma Putra, Arief; Yetri, Yuli; Maimuzar, Maimuzar
Jurnal Teknik Mesin Vol 11 No 2 (2018): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.11.2.169

Abstract

Sanding work is a stage that is carried out before entering the finishing process to remove defects and smooth the surface of the object. The main purpose of making sanding machines with this mechanical belt system is to help and simplify the sanding process. The method for making sanding machines with mechanical belt systems is: needs analysis, problem analysis and specifications, problem statements, concept design, technical analysis, work drawing and tool testing. The results of the design of the sanding machine with a mechanical belt system are obtained in the form of a design with a working drawing of a sanding machine with a mechanical belt system. The sanding machine with a mechanical belt system has specifications that are 500 mm long, 350 mm wide, and 1400 mm high. The source of driving the sanding machine with a mechanical belt system is an electric motor ¼ HP with 2800 rpm rotation. The transmission system uses pulleys. The sanding machine with a mechanical belt consists of several components, namely the engine frame, electric motor, pulleys, tables, belt aplas, and adjustment of the belt strength of the sandpaper. The belt pulley used is from ST 37 with a diameter of 25 mm and pulley rotation of 2800 rpm. Frame construction uses hollow iron measuring 40x40x3 mm from ST 37 material. The table uses 590x150 acrylic material.
Hubungan Pemahaman Keselamatan dan Kesehatan Kerja (K3), Kedisiplinan Mahasiswa, dan Bimbingan Dosen terhadap Unjuk Kerja Praktik Mahasiswa Program Studi Teknik Mesin Politeknik Negeri Padang Fardinal, Fardinal; Jalinus, Nizwardi; Hendri, Hendri
Jurnal Teknik Mesin Vol 11 No 2 (2018): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.11.2.168

Abstract

The problem in this research was the low performance of student in the Practical of Mechanical Workshop Mechanical Engineering Study Program Polytechnic State of Padang in the implementation of learning practices that affected by occupational safety and health , student discipline, and guidance of lecturer. This study aims to analyze the relationship occupational safety and health, student discipline and guidance of lecturer with the student practice performance of mechanical workshop Mechanical Engineering Study Program Polytechnic State of Padang. This study was a correlational study with a quantitative approach. The population of the research is all the student of 2016 with consisted of 125 people. The sampling technique used is proportional random sampling, that 96 people as a sample and 29 people were respondents taken from the population. Data were collected through a questionnaire that had been tested for validity and reliability. The results showed that, 1) there is a strong and positive correlation between occupational safety and health  with the student practice performance with rhitung (0.463)> rtabel (0,199); 2) There is a strong and positive correlation between discipline with performance of students practical with rhitung (0.479)> rtabel (0,199); 3) There is a strong and positive relationship between the guidance of lecturers with the performance of student practical with rhitung (0.451)> rtabel (0,199); 4) there is a very strong and positive together occupational safety and health discipline students and guidance of the lecturer with the performance of student practical rhitung (0.525)> rtabel (0,199).
RANCANG BANGUN MESIN PERAJANG PELEPAH SAWIT UNTUK PAKAN TERNAK Leni, Desmarita; Bahar, Zulbahri; Selviyanty, Veny
Jurnal Teknik Mesin Vol 11 No 2 (2018): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.11.2.167

Abstract

The design of the palm frond chopper machine for animal feed is a vocational application. The purpose of making palm frond chopper machines for animal feed is to help the community open a business field, especially the development of livestock production who grow oil palm. It is an expected that the palm frond chopper machine can help the community to improve economic output. This machine has dimensions of 600 mm x 500 mm where the working principle of the machine is to cut using a blade to accelerate the cutting process. Blade rotation is a obtained by using  3 HP motor and using pulley 5 inch as a tool to rotate the knife plate.
Pembuatan Cetakan Pasir Dan Proses Pemesinan Untuk Komponen Blok Pompa Pada Mesin Pompa Air Merk Matrix Model Mtx-22c Firdaus, Firdaus; Rakiman, Rakiman; Effiandi, Nota; Yetri, Yuli
Jurnal Teknik Mesin Vol 11 No 2 (2018): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.11.2.166

Abstract

Reverse Engineering (RE) is a process in manufacturing that aims to reproduce or recreate existing models, either components, sub-components, or products without using existing design documents or working drawings. Through this reverse engineering idea, the process of making the Pump Block component is started with making part and mold design, making sand casting, then finished with machining processes. The machining process that is carried out is the turning process, the milling process, and the drilling process which is assisted by using jigs and fixture to make it easier on finishing the Pump Block parts in the machining process. By using the processes, so it is produced the similar pump block that is resemble with desired original object.
Pengukuran Objek 2 Dimensi Dengan Menggunakan Kamera Berbasis LabVIEW Amri, Khairul; Sumiati, Ruzita
Jurnal Teknik Mesin Vol 11 No 2 (2018): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.11.2.165

Abstract

Quality Control (QC) is one of the most important components in the manufacturing process. The aim is to determine whether a product is feasible to market. One aspect of QC is the size / dimension of the object to be made. If the size is still within the range of tolerance, then it has passed the QC in terms of size, but if not then it includes a failed product. The problem encountered is that it takes a long time to take measurements, especially objects in the third dimension where each part is different as microdrill, zipper etc. To overcome this weakness, a CCD camera is used as a sensor to record images and then use LabVIEW software to analyze the size of the recorded image. This is a preliminary study so that it is only done for objects with two dimensions with square and circular shapes. From the research that has been done, the measurement with the camera gives results that are almost the same as the use of calipers where the standard deviation fluctuates from 0.3 to 23.8 for circles and 0.54 to 32.05 for squares. Furthermore, the time needed to do one measurement process with the camera ranges from 201 ms to 338 ms whereas using the calipers takes 3 to 5s
Pengaruh Kemiringan Saluran Terhadap Fenomena Flooding Dengan Gangguan Pada Aliran Udara–Air Dan Udara–Minyak Tanah Candra Mayana, Hendri
Jurnal Teknik Mesin Vol 11 No 2 (2018): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.11.2.163

Abstract

Some equipments which are used in petroleum industries, chemical industries, steam power-plants and nuclear reactors must avoid the flooding phenomena in order to work at optimal condition. The purpose of this research is to investigate the effects of inclination and obstacle on flooding onset at counter-current  air-water and air-kerosene flows with  porous inlet and sharp outlet. The model of obstacle was conformed to industrial application i.e .pipe joining or pipe scaling.  Experimen ts were conducted in a plexyglass pipe of 25.4 mm diameter and 2500 mm length of test section at annular flow pattern. The variation of inclination of ducts are 90o, 80o and 60o. The geometry of the obstacle is a ring with rectangular cross sectional which is  installed with a distance 600 mm or  1200 mm from the  inlet. The result of the research indicated that the effects of  inclination and obstacle of ducts are significant toward flooding onset. Flooding phenomena was indicated with drastic increase of pressure gradient above the liquid inlet. Flooding phenomena happened earlier of larger inclination of the ducts and nearer obstacle of the inlet. This phenomena also early happened at kerosene which have higher  viscosity and lower surface tension than water
Peningkatan Profesionalisme Sumber Daya Manusia Melalui Pendidikan Vokasi yang Berbasis Kebutuhan Masyarakat Marizka, Dewi Auditiya
Jurnal Teknik Mesin Vol 9 No 1 (2012)
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.9.1.24

Abstract

Kecenderungan pemenuhan kebutuhan manusia dalam hal barang dan jasa makin meningkat. Kecenderungan kebutuhan dan sekaligus tantangan ini pada akhirnya bermuara pada tuntutan terpenuhinya sumberdaya manusia (SDM) yang profesional dan produktif. Tantangan ini perlu dihadapi dengan menata dan mengatur kembali peran pendidikan vokasi di Indonesia. Pendidikan vokasi dan pendidikan umum sesungguhnya merupakan pilihan layanan yang dapat dipilih secara bebas oleh masyarakat. Pengembangan pendidikan vokasi seyogyanya dikembangkan tidak hanya melalui sekolah, namun juga melalui  pendidikan vokasi yang berjenjang perguruan tinggi dan dapat dibentuk secara formal. Selain itu, pengembangan pendidikan vokasi perlu dikembangkan secara integral dengan pengembangan komunitas dan berbasis kebutuhan masyarakat/lingkungan. Kecenderungan kebutuhan dan tantangan ini pada akhirnya bermuara pada tuntutan terpenuhinya sumberdaya manusia (SDM) yang professional dan produktif. Sesungguhnya lembaga pendidikan tinggi memiliki peran besar dalam merencana dan menciptakan SDM tingkat menengah yang profesional dan produktif.
Pengembangan Paduan Al-Si Hipereutektik yang akan Diterapkan untuk Komponen Otomotip Saufan, Akhmad
Jurnal Teknik Mesin Vol 9 No 1 (2012)
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.9.1.19

Abstract

This research will develop the hypereutectic Al-Si alloy that will be used to make automotive parts. The progress of this study is to make three alloy compositions; Al-30Si, Al-35Si and Al-40Si. The making process of the alloys by melting and alloying which are then poured into steel tube mold at different casting temperatures but the same superheat 100oC. The cast products are then metallographic tested and hardness tested. The microstructure of those three cast alloy products is cast structure consisting of much elongated large proeutectic silicon phase, the lamellar eutectic phase, chill structure, and cast defects consisting of shrinkage and porosity. The Brinell Hardness Number of the three cast products show that hardness of the Al-Si alloy will increase by increasing silicon content.

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