cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Andri Nofiar
Contact Email
garuda@apji.org
Phone
+6285885852706
Journal Mail Official
febri@apji.org
Editorial Address
Perum Cluster G11 Nomor 17 Jl. Plamongan Indah, Kadungwringin, Pedurungan, Semarang, Provinsi Jawa Tengah, 50195
Location
Kota semarang,
Jawa tengah
INDONESIA
Mars: Jurnal Teknik Mesin, Industri, Elektro dan Ilmu Komputer
Published by Asosiasi Riset Teknik Elektro Dan Informatika Indonesia
ISSN : 30318750     EISSN : 30318742     DOI : 10.61132
Core Subject : Science,
Computer Science & IT
Mars : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer memuat naskah hasil-hasil penelitian di bidang Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 278 Documents
 24   25   26   27   28 
Pengembangan Desain Alat Pirolisis Tipe Fast Pyrolysis dengan Reaktor Screw Bertingkat untuk Pengolahan Kulit Kopi
Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 4 No. 1 (2026): Februari: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v4i1.1489

Abstract

Pyrolysis is a biomass conversion method into fuel through heating at high temperatures under oxygen-limited conditions. The main factors influencing the pyrolysis process include temperature, residence time, pressure, particle size, reactor design, and the type of pyrolysis employed. This study aims to design an auger-type fast pyrolysis system based on previous research. The design and modeling of the fast pyrolysis equipment were carried out using Autodesk Inventor 2021 software. Based on the calculation and design results, a fast pyrolysis reactor with a multi-stage configuration and a capacity of 5.2 kg was developed. The system consists of a three-stage reactor made of Stainless Steel 304. The reactor is equipped with a screw conveyor for material transport, which is driven by an electric motor. Biomass heating inside the reactor is provided by a clamp heater with an electrical power requirement of 611 W, while biomass cooling is performed using a condenser with a cooling water capacity of 15.586 liters. Based on the structural simulation results, the maximum von Mises stress obtained was 35.4 MPa, the maximum displacement was 0.0528 mm, and the safety factor was 6.07 under loading conditions including an internal reactor pressure of 0.32 MPa, a torsional moment of 1,130 kg·mm, and an operating temperature of 700 °C. These values are within the allowable limits of the material, indicating that the designed reactor is structurally safe and feasible for use.
Pengukuran Beban Kerja pada Karyawan Non Organik Grup A di PT XYZ dengan Metode SOFI dan SDS
Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 4 No. 1 (2026): Februari: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v4i1.1493

Abstract

The most valuable asset of a company is its employees due to their performance. The performance of PT. XYZ in recent times has tended to decline due to the heavy workload on Group A non-organic employees, which has resulted in reduced employee productivity. This study aims to determine the workload value and the level of fatigue experienced by Group A non-organic employees at PT. XYZ using the SOFI and SDS methods. It also aims to recommend efforts to reduce the workload and stress levels for Group A non-organic employees at PT. XYZ. This study is a descriptive qualitative research using interview methods and distributing questionnaires to 18 non-organic employees of group A. The results of the study indicate that the analysis of workload (fatigue) measurement using the SOFI method obtained a physical fatigue level among non-organic employees of group A at PT. XYZ with an average total score of 4.61, which means that the employees experienced a workload (fatigue) level categorized as moderate. Meanwhile, the analysis of work stress measurement using the SDS method obtained an average total score of 14, indicating that the stress level among non-organic employees of group A at PT. XYZ falls in the moderate category.
Pembuatan Paku Payung Panjang 50 mm, Diameter 2,5 mm, Tebal Pelat Payung 1,2 mm Kapasitas 300 Biji/Jam
Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 4 No. 2 (2026): April : Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v4i2.1608

Abstract

The problem lies in the quality of the umbrella nails for asbestos or zinc roofs which often experience damage to the nail head is not large enough, the tip of the nail is blunt, thus damaging the roof material, and susceptibility to corrosion due to weather, and slow manual production. The purpose of making is to obtain umbrella nails with a length of 50 mm and a diameter of 2.5 mm which are strong, pointed tips, relatively fast. The manufacturing method includes: making cylindrical umbrella pieces from 2 mm thick aluminum with a diameter of 25 mm and a 1.5 mm hole center, selecting raw materials for low carbon steel wire, AISI 1020 in the form of a 3 mm diameter coil, straightening and reducing the cross-section of wire using a die (wire drawing),, forming the nail head (cold heading), mechanically cutting the pointed end, forming the nail umbrella from cylindrical pieces that have been inserted with 50 mm long nails and pressed, immersing the umbrella nails in 500oC zinc liquid (galvanizing) for 2 minutes, checking dimensions and quality standards. The manufacturing results are in the form of strong zinc-coated thumbtacks measuring 50 mm in length, 2.5 mm in diameter, 1.2 mm in thickness of the thumbtack plate, total production cost of IDR 340/unit, and process duration of 12 seconds/unit, which implies that the need for strong and corrosion-resistant thumbtacks can be met for various related engineering needs.
Produksi Blok Silinder Aluminium Cor Diameter 54,5 mm x Langkah 59 mm Kapasitas 2 Unit/Jam
Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 4 No. 2 (2026): April : Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v4i2.1609

Abstract

. The manufacturer's discontinuation of original spare parts for the 149 cm3 two-stroke cylinder block has had a significant impact, resulting in a shortage of products sought by consumers, creating a market gap for local manufacturers to produce spare parts with equivalent and competitive quality. The production objective is to obtain an ADC12 cast aluminum cylinder block with a diameter of 54.5 mm x a stroke of 59 mm. The production method includes: a series of systematic steps of 3D scanning of the cylinder block for geometric accuracy, making a Resin Sand Casting (RSC) mold whose size has been increased due to the shrinkage percentage ADC12-Machining-Pattern removal slope, making a core for the hollow part from RSC material, a melting process using an LPG furnace in parallel stages using 2 RSC molds, natural cooling for about 60 minutes, cutting the casting bowl channel and cutting the riser, T6 heat treatment, and quality and dimensional inspection. The production results are in the form of an ADC12 cast aluminum cylinder block with a diameter of 54.5 mm x stroke of 59 mm, the tensile strength after heat treatment is around 300 MPa, the total production cost is IDR 375,000/unit, and the process duration is 30 minutes/unit which implies that the need for a cylinder block volume of 149 cm3 for two-stroke motorcycles (takt) can be met, so that this type of motorcycle can be used again.
Pembuatan Penggantung Pakaian Bahan Kawat Aluminium Diameter 3 mm, Panjang 45 cm, Kapasitas 50 Biji/Jam
Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 4 No. 2 (2026): April : Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v4i2.1610

Abstract

The general metal clothes hanger that is still made manually is not strong enough as a problem faced. The purpose of making is to obtain a clothes hanger made of aluminum wire with a diameter of 3 mm with a length of 45 cm that is light and strong enough. The manufacturing method includes: clothes hanger design, making a bender in the form of a jig from semi-automatic clothes bending steel, preparing raw materials for AA1100 type aluminum wire with a diameter of 3 mm, preparing bending tools and labor, cutting 3 mm diameter wire with a length of 100 cm, bending the wire into a clothes hanger, finishing according to orders painted or anodized or left in natural color, quality and dimension inspection, and packaging. The manufacturing results are clothes hangers made of aluminum wire with a diameter of 3 mm, a length of 45 cm weighing 150 g which can withstand a load of around 2 kg, a total production cost of IDR 2319/unit, and a process duration of 72 seconds/unit which implies that the manufacturing is feasible to be applied to small and medium scale industries or businesses.
Produksi Katup Mesin Diesel Tipe TS70/80, Silinder 500 cm3, fBatang 7x105 mm, Kapasitas 1 Biji/Jam
Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 4 No. 2 (2026): April : Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v4i2.1611

Abstract

The unavailability of intake and exhaust valves for 500 cm³ diesel engines manufactured in the 1980s has created difficulties in maintaining and operating agricultural tractors. This study aimed to manufacture replacement intake and exhaust valves using SUH 35 austenitic steel according to the original engine specifications. The production process included design preparation, material selection, raw material measurement, forging, machining, heat treatment, quality inspection, and packaging. SUH 35 steel rods measuring 12 mm in diameter and 105 mm in length were used as the raw material. Forging was performed to form the valve heads, producing exhaust valves with a diameter of 30 mm and thickness of 2 mm, and intake valves with a diameter of 35 mm and thickness of 2.5 mm. After machining, the final dimensions of the exhaust valve were 29.5 mm head diameter, 2 mm thickness, 105 mm length, and 7 mm stem diameter, while the intake valve measured 33.5 mm head diameter, 2.5 mm thickness, 105 mm length, and 7 mm stem diameter. Hardening treatment produced a hardness value of 40 HRC. The manufactured valves met the required dimensional and mechanical specifications. The production cost was IDR 100,000 per unit, with a processing time of approximately 60 minutes per unit. The results demonstrate that replacement valves for 500 cm³ diesel engines can be successfully reproduced, enabling the continued operation and maintenance of older tractor engines.
Peningkatan Kekakuan Atap Galvalum Sinusiodal 1,8x0,81m, Tebal 0,25 mm dengan Lekukan Garis, Kapasitas 300 Lembar/Jam
Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 4 No. 2 (2026): April : Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v4i2.1612

Abstract

The main issue addressed in this study is the insufficient stiffness of a sinusoidal galvalum roof measuring 1.8 × 0.81 m with a thickness of 0.25 mm. The objective was to improve the roof’s stiffness so that it could adequately withstand rainwater weight, wind loads, and human loads. The production process involved parametric finite element simulations to optimize profile stiffness, selection of aluminum-coated steel (Galvalum) consisting of 55% aluminum and 45% zinc, and roll-forming a sinusoidal profile with a wave height and depth of 20 mm. Additional curved lines, 2 mm deep and 10 mm wide, were introduced at the wave peaks and valleys to enhance structural rigidity. The process also included cutting the roof to a length of 1.8 m, bending tests to evaluate stiffness improvement, specification and brand printing, and quality inspection. The resulting roof exhibited a stiffness increase of 38.6% compared with the conventional profile. Production costs were IDR 3,222 per sheet, with a manufacturing time of 12 seconds per sheet. These results indicate that the modified sinusoidal galvalum roof provides greater stiffness and better performance at a standard support spacing of 1.2 m.  
Fabrikasi Pisau Rotor Traktor Manual Baja Karbon Menengah Ukuran 220×80×8 mm, Kapasitas 0,5 Biji/Jam
Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 4 No. 2 (2026): April : Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v4i2.1613

Abstract

The problem in manual tractors lies in the rotor blades that are not wear-resistant and their dimensions are not up to standard. The purpose of fabrication is to obtain medium carbon steel manual tractor rotor blades measuring 220×80×8 mm. Fabrication methods include: standard blade design measuring 220 mm long, 80 mm wide, 8 mm thick, and 9 mm hole diameter, selection of used leaf spring steel type SUP9A measuring 500×90x10 mm, cutting used leaf springs, straightening used leaf springs, forging used leaf springs, drilling used leaf springs with a diameter of 9 mm, hardening at 850°C, tempering at 450°C, sharpening tractor rotary blades, finishing, product quality hardness testing. The fabrication results are in the form of a manual tractor rotary blade with dimensions of 220 × 80 × 8 mm from used SUP9A spring steel which is forged with a hardening hardness value of 55 HRC which is higher than the standard value of 50 HRC or 10% harder and the tempering results reach 45 HRC, the total production cost is IDR 80,000/unit and the processing duration is 130 minutes/unit which implies that the rotor blade is wear-resistant and has met the dimensional standards.

Page 28 of 28 | Total Record : 278

 24   25   26   27   28 

Filter by Year

2023 2026


Reset
Filter By Issues
All Issue Vol. 4 No. 2 (2026): April : Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 4 No. 1 (2026): Februari: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 3 No. 6 (2025): Desember: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 3 No. 5 (2025): Oktober: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 3 No. 4 (2025): Agustus: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 3 No. 3 (2025): Juni: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 3 No. 2 (2025): April: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 3 No. 1 (2025): Februari: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 2 No. 6 (2024): Desember: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 2 No. 5 (2024): Oktober: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 2 No. 4 (2024): Agustus: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 2 No. 3 (2024): Juni: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 2 No. 2 (2024): April: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 2 No. 1 (2024): Februari: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 1 No. 4 (2023): Agustus: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer More Issue