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All Journal Jurnal Teknologi Terapan Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) MACHINERY: Jurnal Teknologi Terapan Jurnal Pengabdian kepada Masyarakat (Nadimas) Jurnal Pengabdian Masyarakat Metalik: Jurnal Manufaktur, Energi, Material Teknik
Candra Irawan
Departemen Teknik Mesin dan Industri, Fakultas Teknik, Universitas Gadjah Mada
Arts Automotive Engineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation

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PENGARUH TEMPERATUR EKSTRUSI TERHADAP SIFAT FISIS, KIMIAWI DAN KEKUATAN TARIK FILAMEN ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE (UHMWPE) Candra Irawan; Budi Arifvianto; Muslim Mahardika
Jurnal Teknologi Terapan Vol 7, No 2 (2021): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v7i2.325

Abstract

Currently, fused deposition modeling (FDM) has become a popular 3D printing technique for the fabrication of polymeric parts. In this technique, a polymer filament is melted and deposited layer-by-layer to form 3-dimensional objects. However, there are still limited number of polymer types that has been successfully used as a raw material for the FDM process. Up to now, there is still no filament made from ultra high molecular weight polyethylene (UHMWPE) available in the market. Therefore, a preliminary study concerning the fabrication of such UHMWPE filament needs to be conducted. In this study, the influence of extrusion temperature used in the fabrication of UHMWPE filament on the physical, chemical, and tensile strength of such filament was studied. The extrusion process was carried out by adding polyethylene glycol (PEG) and paraffin oil (PO) to improve the processability of UHMWPE material and with temperatures of 160 oC, 170 oC, and 180 °C. The result of examination by using electron microscope revealed that extrusion process of this polymer was running stable. The characterization by using differential scanning calorimetry (DSC) indicated a decrease in the degree of filament crystallinity as the extrusion temperature decreased. The characterization by using Fourier-transform infrared spectroscopy (FTIR) indicated no changes in the chemical compositions over the filament products with the increasing extrusion temperature applied. Meanwhile, it is also indicated from this study that the maximum tensile strength decreased as the extrusion temperature got lower. In this case, the highest maximum tensile strength could be achived by the UHMWPE filament extruded with temperature of 180 °C, i.e., with an average tensile strength of 22.52 MPa.
RANCANG BANGUN DAN PENGUJIAN MESIN PENGADUK SUSU KEDELAI DENGAN VARIASI BENTUK PENGADUK Irawan, Candra; Suwandi, Dedi; Kusmayadi, Adi; Rohmat, Yusup Nur
MACHINERY Jurnal Teknologi Terapan Vol. 5 No. 3 (2024): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.14241897

Abstract

Haurgeulis District in Indramayu Regency is known as one of the areas producing quality soybeans. In this region, many mothers who are members of UMKM take advantage of this potential by producing soy milk. However, the process of making soy milk is still manual, one of which is the stirring stage during heating. This often results in inconsistent results and requires quite a lot of effort. To overcome this problem, research was carried out to design and build a soy milk mixing machine expected to increase production efficiency and quality, as well as support UMKM in developing their businesses. The purpose of this design is to make the mixing process easier, the method used is how much power is needed, how much production capacity, how much electricity is used, and which form of the stirrer can produce fast, consistent, and even mixing. The result of this design is a motor power of around 0.18 kW. Apart from that, stirrer C required the shortest time with an average of 2.54 seconds. The process of cooking milk in one production of 4 liters takes 1 hour and 6 minutes over low heat. At 100 rpm rotation, the power consumed is 844.2 W. The electricity costs to operate this machine are around IDR 7,000-IDR 10,000 per month to produce 1 hour per day.
EFEKTIFITAS PELATIHAN PNEUMATIK DALAM MENINGKATKAN KOMPETENSI SISWA JURUSAN PERMESINAN DI SMK PGRI JATIBARANG Kusmayadi, Adi; Irawan, Candra; Farhan, Ahmad; Alba Pradhana , Claudha
Jurnal Pengabdian kepada Masyarakat (NADIMAS) Vol 3 No 2 (2024): Jurnal Pengabdian kepada Masyarakat (Nadimas)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/nadimas.v3i2.77

Abstract

The development of automation technology in modern industry demands an increase in technical competence for vocational students, particularly in the field of pneumatics. The widespread application of pneumatic systems in industrial processes makes mastering this technology essential for students in the machinery department. This study aims to assess the effectiveness of pneumatic system training for Machinery Department students at the Vocational High School (SMK) PGRI Jatibarang in enhancing their knowledge and skills. The method used in this research is a quasi-experimental design with a pre-test and post-test format. Students were provided with theoretical materials, guidance, and hands-on practice on pneumatic equipment. The analysis results show an average N-Gain of 0.863, which falls into the high improvement category, indicating that this training significantly impacts students' understanding of pneumatic systems. The implications of this research suggest that practice-based training and material reinforcement can serve as effective strategies in vocational education to prepare students for industry demands, emphasizing the importance of hands-on approaches in technical skills learning.
PELATIHAN DASAR MENGGAMBAR TEKNIK SISWA SMK PGRI JATIBARANG Farhan, Ahmad; Alba Pradana, Claudha; Kusmayadi, Adi; Irawan, Candra
Jurnal Pengabdian kepada Masyarakat (NADIMAS) Vol 3 No 2 (2024): Jurnal Pengabdian kepada Masyarakat (Nadimas)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/nadimas.v3i2.78

Abstract

PGRI Jatibarang Vocational School is one of the vocational schools on Jalan Mayor Dasuki No. 159 Jatibarang, Indramayu Regency, West Java Province. Based on the results of observations on PGRI Jatibarang Vocational School students who are PKL at the Politeknik Negeri Indramayu (Polindra), there are problems regarding understanding technical drawings. In order to improve the skills of PGRI Jatibarang Vocational School students, especially in understanding technical drawing to increase the competitiveness of graduates. The PKM team conducted a group discussion forum (FGD) with vocational school stakeholders, especially vocational school students who were doing internships at the D4 Manufacturing Design Study Program. The PKM team collected data and explored the problems that existed among the intern students. After conducting the FGD, the PKM Team conducted technical drawing training for students at the PGRI Jatibarang Vocational School, Indramayu Regency. The results of this training show a fairly effective increase based on pretest and posttest scores with N-Gaing.
Pengukuran Beban Kerja Mental Pada Bengkel Motor di Desa Pawidean Dengan Metode NASA-TLX Pradhana, Claudha Alba; Farhan, Ahmad; Kusmayadi, Adi; Irawan, Candra
Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Vol 10, No 1 (2025): Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mech
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/jtmm.v10i1.5866

Abstract

Abstrak. Usaha Mikro, Kecil, dan Menengah (UMKM) memiliki peran penting dalam perekonomian Indonesia, termasuk di sektor bengkel motor. Namun, di balik operasionalnya, para pekerja menghadapi tantangan berat, terutama dalam hal beban kerja mental dan fisik. Penelitian ini bertujuan untuk mengukur tingkat beban kerja mental para mekanik menggunakan metode NASA-TLX (National Aeronautics and Space Administration Task Load Index), yang menilai enam aspek utama: tuntutan mental, tuntutan fisik, tuntutan waktu, kinerja pribadi, usaha, dan tingkat frustrasi. Hasil penelitian menunjukkan bahwa aspek usaha (Effort) memiliki skor tertinggi dengan rata-rata 364, disusul oleh tuntutan fisik (328) dan tuntutan waktu (124). Operator dengan beban kerja mental tertinggi memperoleh skor NASA-TLX sebesar 82, sementara yang terendah adalah 72. Beban kerja yang tinggi ini disebabkan oleh berbagai faktor, seperti banyaknya pekerjaan yang harus diselesaikan dalam waktu terbatas, tuntutan hasil kerja yang sempurna, serta kurangnya tenaga kerja sehingga karyawan harus bekerja lebih keras. Untuk mengatasi masalah ini, beberapa solusi dapat diterapkan, seperti menambah tenaga kerja, menyederhanakan proses pencatatan, serta memberikan insentif bagi pekerja lembur. Dengan langkah-langkah ini, diharapkan kesejahteraan pekerja meningkat dan produktivitas bengkel tetap terjaga.Kata Kunci: Beban kerja mental, NASA-TLX, mekanik bengkel, stres kerja, produktivitas.Abstract. Micro, Small and Medium Enterprises (MSMEs) play an important role in the Indonesian economy, including the motorcycle repair sector. However, behind their operations, workers face tough challenges, especially in terms of mental and physical workload. This study aims to measure the level of mental workload of mechanics using the NASA-TLX (National Aeronautics and Space Administration Task Load Index) method, which assesses six main aspects: mental demands, physical demands, time demands, personal performance, effort, and frustration level. The results showed that the Effort aspect had the highest score with an average of 364, followed by Physical demands (328) and Time demands (124). The operator with the highest mental workload obtained a NASA-TLX score of 82, while the lowest was 72. This high workload is caused by various factors, such as the amount of work that must be completed in a limited time, the demand for perfect work results, and the lack of manpower so that employees have to work harder. To overcome this problem, several solutions can be implemented, such as increasing the workforce, simplifying the recording process, and providing incentives for overtime workers. With these measures, it is hoped that worker welfare will improve and workshop productivity will be maintained.Keyword: Mental workload, NASA-TLX, workshop mechanic, work stress, productivity.
RANCANG BANGUN MESIN CETAK ECO PAVING BLOCK PNEUMATIK BERBASIS LIMBAH PLASTIK Kusmayadi, Adi; Sukroni, Sukroni; Haris, Emin; Irawan, Candra; Rohmat, Yusup Nur; Syaifurrahman, Arief; Gunawan, Leo Van; Ghozali, Muhamad
Jurnal Teknologi Terapan Vol 11, No 1 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i1.715

Abstract

The escalating volume of plastic waste has become a critical environmental challenge, highlighting the need for innovative solutions to repurpose it into valuable construction materials. This study aimed to design and develop a pneumatic-based eco-paving block printing machine that uses plastic waste as its primary raw material. The research methodology encompassed the design and simulation of pneumatic circuits, structural analysis involving stress distribution, displacement, and factor of safety (FOS), and strength testing of the fabricated eco-paving blocks. The machine was equipped with a pneumatic cylinder measuring 80 × 75 mm, operating at a pressure of 6 bar and generating a maximum pressing force of 300 kg. The simulation results confirmed that the maximum stress and displacement remained within safe limits, with a minimum FOS of 8.4, thereby ensuring a stable and reliable design. Testing of the eco-paving blocks revealed compressive strengths ranging from 38 to 54 MPa, surpassing the requirements of the SNI 03-0691-1996 standard. This study demonstrates that a pneumatic-based eco-paving block printing machine effectively transforms plastic waste into high-quality construction materials compliant with national standards, offering a practical solution to the plastic waste crisis while promoting sustainability in the construction industry.
Sosialisasi Kesehatan dan Keselamatan Kerja di Bengkel Alfian Motor Farhan, Ahmad Farhan; Alba Pradhana, Claudha; Kusmayadi, Adi; Irawan, Candra
Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 1 (2025): Juli
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat Politeknik Negeri Media Kreatif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46961/jpk.v5i1.1613

Abstract

Abstrak: Keselamatan dan Kesehatan Kerja (K3) merupakan komponen vital dalam menciptakan lingkungan kerja yang aman, sehat, dan produktif. Hal ini menjadi sangat penting khususnya di sektor informal seperti bengkel motor, di mana risiko kecelakaan kerja cukup tinggi akibat penggunaan alat berat, paparan bahan kimia berbahaya, serta kurangnya penerapan prosedur kerja yang aman. Pengabdian kepada masyarakat ini dilaksanakan di Bengkel Motor milik Bapak Sukirno yang berlokasi di Desa Pawidean, Kecamatan Jatibarang, Kabupaten Indramayu. Tujuan dari kegiatan ini adalah untuk memberikan edukasi dan meningkatkan kesadaran pekerja serta pemilik bengkel mengenai pentingnya penerapan prinsip-prinsip K3 dalam aktivitas kerja sehari-hari. Kegiatan dilakukan melalui tahapan observasi awal, penyampaian materi K3, diskusi partisipatif, simulasi penggunaan alat pelindung diri (APD), serta penyebaran media edukatif berupa leaflet dan poster. Hasil kegiatan menunjukkan adanya peningkatan pemahaman pekerja terhadap potensi bahaya kerja, pentingnya penggunaan APD, serta perlunya prosedur keselamatan sederhana yang dapat diterapkan secara konsisten. Kegiatan ini diharapkan menjadi langkah awal untuk membentuk budaya kerja yang lebih aman dan berkelanjutan di bengkel-bengkel kecil, serta memberikan kontribusi nyata dalam menurunkan potensi kecelakaan kerja di sektor informal. Kata Kunci: K3, Bengkel Motor, Sukirno, APD, Sosialisasi, Pengabdian Masyarakat. Abstract:  Occupational Safety and Health (OSH) is a vital component in creating a safe, healthy, and productive work environment. This is especially important in the informal sector such as motorcycle repair shops, where the risk of work accidents is quite high due to the use of heavy equipment, exposure to hazardous chemicals, and the lack of implementation of safe work procedures. This community service was carried out at Mr. Sukirno's Motorcycle Repair Shop located in Pawidean Village, Jatibarang District, Indramayu Regency. The purpose of this activity is to provide education and increase awareness of workers and repair shop owners regarding the importance of implementing K3 principles in daily work activities. The activity was carried out through the stages of initial observation, delivery of K3 materials, participatory discussions, simulations of the use of personal protective equipment (PPE), and distribution of educational media in the form of leaflets and posters. The results of the activity showed an increase in workers' understanding of potential work hazards, the importance of using PPE, and the need for simple safety procedures that can be applied consistently. This activity is expected to be the first step in forming a safer and more sustainable work culture in small repair shops, as well as making a real contribution to reducing the potential for work accidents in the informal sector. Keywords: K3, Motorcycle Workshop, Sukirno, PPE, Socialization, Community Service.
Rancang Bangun dan Pengujian Mesin Penggiling dan Pengaduk Bumbu Soto Mie Kapasitas 10 kg Irawan, Candra; Pradhana, Claudha Alba; Farhan, Ahmad; Endramawan, Tito; Sukroni; Haris, Emin
METALIK : Jurnal Manufaktur, Energi, Material Teknik Vol. 4 No. 2 (2025): Metalik: Jurnal Manufaktur, Energi, Material Teknik
Publisher : Universitas Muhammadiyah PROF. DR. HAMKA Fakultas Teknik – Program Studi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/metalik.v4i2.21015

Abstract

Proses pembuatan bumbu Soto Mie Bogor secara manual membutuhkan waktu yang lama, antara 1 hingga 2 jam untuk mengolah 3 kg bumbu, dan mengandalkan tenaga manusia yang besar. Hal ini mengakibatkan pengadukan yang tidak merata serta mempengaruhi kualitas bumbu. Penelitian ini bertujuan untuk merancang dan menguji mesin penggiling dan pengaduk bumbu Soto Mie Bogor dengan kapasitas 10 kg, yang terdiri dari 8 kg bumbu dan 2 kg minyak, guna meningkatkan efisiensi produksi UMKM. Mesin ini menggabungkan fungsi penggilingan dan pengadukan dalam satu unit yang digerakkan oleh motor listrik 0,75 kW dengan sistem transmisi gearbox rasio 1:40. Desain mesin menggunakan perangkat lunak SolidWorks 2021. Hasil pengujian menunjukkan bahwa mesin ini dapat mengurangi waktu pengolahan bumbu menjadi sekitar 1 jam, jauh lebih efisien dibandingkan dengan metode manual yang memakan waktu 3–4 jam. Mesin ini diperkirakan mengonsumsi sekitar 0,75 kWh per hari, dengan biaya listrik bulanan sekitar Rp31.000 jika beroperasi selama satu jam setiap hari. Implementasi mesin ini diharapkan dapat mengurangi kesalahan manusia, meningkatkan kapasitas produksi, dan mengoptimalkan waktu operasional UMKM Soto Mie Bogor.
Co-Authors Adi Kusmayadi Ahmad Farhan, Ahmad Alba Pradana, Claudha Alba Pradhana , Claudha Alba Pradhana, Claudha Budi Arifvianto Endramawan, Tito Farhan, Ahmad Farhan Haris, Emin Kusmayadi, Adi Leo Van Gunawan Muhamad Ghozali, Muhamad Muslim Mahardika Nur Rohmat, Yusup Pradhana, Claudha Alba Sukroni Sukroni, Sukroni Suwandi, Dedi Syaifurrahman, Arief