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All Journal Abdimas UNWAHAS : Jurnal Pengabdian Masyarakat UNWAHAS Scientific Journal of Mechanical Engineering Kinematika Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Journal of Mechanical Engineering and Applied Technology Aksi Nyata : Jurnal Pengabdian Sosial dan Kemanusiaan International Journal of Mechanical, Electrical and Civil Engineering
Ahmad Mamba'udin
Politeknik Negeri Semarang
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences

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Penerapan Teknologi Operasional Penggunaan Mesin Penarik Kulit Kambing UKM ‘Mak Ngat’ Dipasar Rasamala Perumahan Srondol Wetan Kecamatan Bayumanik Kota Semarang Trio Setiyawan; Riles WM; Sugeng Irianto; Timotius Anggit; Nurhidayati Nurhidayati; Hery Tristijanto; Avicenna An-Nizami; Iman Mujiarto; Yuris Bahadur Wirawan; Elfrida Rizky Riadini; Ahmad Mamba'udin
Aksi Nyata : Jurnal Pengabdian Sosial dan Kemanusiaan Vol. 2 No. 2 (2025): April: Aksi Nyata : Jurnal Pengabdian Sosial dan Kemanusiaan
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/aksinyata.v2i2.1340

Abstract

The partners for this community service activity are UMKM which are engaged in goat slaughtering. One of the problems faced is that the process of removing goat skin is still manual, that is, it still uses human labor, where using human power for the goat skinning process requires less efficient time. Therefore, these UMKM really need a touch of technology related to the goat skin removal method to overcome the problems of UMKM engaged in the business of slaughtering goats and selling goat meat. Therefore, in community service activities, goat skin pulling machines will be handed over to partner entrepreneurs, namely MSMEs. Mak Ngat at the Rasmala market in the Srondol Wetan housing complex, Banyumanik sub-district, Semarang city. Impact After using a goat skin pulling machine for Mak'Ngat UMKM, the goat skinning process is more economical, namely when done manually it can skin 12 goats in one hour, but when done using a machine, 12 goats can be done in 15 minutes and this number has increased drastically
Design and Construction of Scaffolding with a Lifting Capacity of 300 kg Using a Drive Electric Hoist AC 220 V Riles Melvy Wattimena; Ignatius Gunawan Widodo; Yuris Bahadur Wirawan; Ahmad Mamba'udin; Abdul Syukur Alfauzi; Bambang Tjahjono; Timotius Anggit Kristiawan; Trio Setiyawan
International Journal of Mechanical, Electrical and Civil Engineering Vol. 2 No. 4 (2025): October: International Journal of Mechanical, Electrical and Civil Engineering.
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijmecie.v2i4.357

Abstract

Maintenance and repair work in a building or structure is not only in low places, but also in high places which require assistive devices. The assistive device in question is scaffolding. The design of this scaffolding begins with a literature study followed by data collection in the Mechanical Engineering Department of the Semarang State Polytechnic to obtain data on the need for height assistive devices which are used as a reference for making electric scaffolding. The purpose of this study is to design an electric scaffolding with a capacity of 300 kg and to perform the performance of the electric scaffolding made. After the design of the electric scaffolding, the dimensions of the equipment were obtained, namely 1000 mm x 1500 mm x 2000 mm and specifications that can lift goods with a maximum height of 5 m, a minimum height of 0.35 m, a maximum load of 300 kg and an AC 220 V electric hoist drive. Based on the results of the performance test, in this case the test data was taken from the weight of the load that the machine can lift based on the travel time when the machine moves up and down. The load weight of 300 kg with electric scaffolding was covered in 27.44 seconds when going up and 21.02 seconds when moving down.
SIFAT MEKANIK DAN FISIK 3D-PRINTED DENTAL PHOTOPOLYMER RESINS DALAM KONDISI PEMROSESAN YANG BERBEDA Ahmad Mamba'udin; Muhammad Akhsin Muflikhun; Adam Zuyyinal Adib; Dianisa Khoirum Sandi; Elfrida Rizky Riadini; Yuris Bahadur Wirawan
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 2 (2025): SJME Kinematika Desember 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i2.796

Abstract

Photopolymer resins have widely applied in dentistry to fabricate temporary restorations. This work gives a complete characterization of a dental non-castable photopolymer resin prepared via Digital Light Processing (DLP) 3D printing. Specimens were printed at layer thicknesses of 0.05, 0.075, and 0.1 mm, followed by post-cured treatments under UV light for 10, 20, and 30 minutes. A series of material characterization tests were performed, including assessments of hardness, moisture absorption behavior, and density measurements. The results indicate that hardness and moisture content are significantly impacted by post-curing time, while extended curing times resulted in greater specimen’s hardness and decreased moisture content. An increase in layer thickness led to a gradual reduction in hardness. A maximum hardness value of 57.7 Shore D was observed in the 3D-printed specimen, along with a highest moisture content of 1.05% MC. As expected, the specimens exhibited consistent density (1.19 ± 0.02 g/cm³) throughout all layer thickness and curing time variations. This study highlights the critical need to understand how process parameters affect dental non-castable photopolymer resin properties prior to clinical implementation.
Uji Performa Kendaraan Motor Listrik Transmisi Chain dan Van Belt Wahyu Isti Nugroho; Ahmad Hamim Su’udy; Muhammad Showi Nailul Ulum; Slamet Priyoatmojo; Atikah Ayu Janitra; Ahmad Mamba'udin
Journal of Mechanical Engineering and Applied Technology Vol. 4 No. 1 (2026): VOLUME 4 ISSUE 1 YEAR 2026 (MARCH 2026)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v4i1.7511

Abstract

The purpose of this study is to compare the performance of chain and belt timing transmission on a 2 kW electric motorcycle used in an electric conversion vehicle. This research is based on the popularity of electric motorcycles as an environmentally friendly transportation alternative and the need for more efficient transmission systems to improve vehicle efficiency. Although electric motors are highly efficient, it is important to choose the right transmission system to transmit power to the wheels. This study analyzes the effect of transmission type on the torque and power generated using dynotest testing to compare the performance of each. For this study, the transmission system was designed with a chain and timing belt with the same ratio. Then, using a dynotest, tests were conducted at various rotation speeds. The test results showed that the chain and timing belt produced greater torque and power at certain ratios, and the chain produced lower torque and power at other ratios. This study found that the transmission ratio affects the efficiency of torque and power transfer in chain and timing belt transmissions. By identifying the components that affect the performance of the transmission system, this study provides important information for the development of electric motorcycles. Ultimately, this will help electric vehicles become more efficient and reliable.
PENERAPAN DAUR ULANG (RECYCLE) PASIR SILIKA DALAM PROSES PEMBUATAN CETAKAN PASIR UNTUK MENEKAN BIAYA PRODUKSI DI CV. RAM TEGAL Padang Yanuar; Ampala Khoryanton; yuris wirawan; Hery Tristijanto; Timotius Anggit Kristiawan; Farika Tono Putri; Abdul Syukur Alfauzi; Sri Harmanto; Wahyu Isti Nugroho; Zaenal Abidin; Friska Ayu Fitrianti Sugiono; Elfrida Rizky Riadini; Iman Mujiarto; Ahmad Mamba'udin; Evan Bagas Satya; Anoeng Prasetyo; Tegar Aprilio Mahendra
ABDIMAS UNWAHAS Vol. 11 No. 1 (2026): Abdimas Unwahas
Publisher : Universitas Wahid Hasyim Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/abd.v11i1.15346

Abstract

Objek yang menjadi mitra kegiatan pengabdian adalah CV. Rejeki Abadi Machinery (CV RAM) yang bergerak di bidang pengecoran logam. Dalam proses produksinya, perusahaan menggunakan pasir silika sebagai bahan utama dalam pembuatan cetakan untuk komponen pompa. Permasalahan yang dihadapi mitra adalah belum dimanfaatkannya limbah dari proses pengecoran di CV.RAM khususnya pasir silica, sehingga biaya produksi menjadi tinggi. Solusi yang diberikan adalah pasir silica setelah digunakan direcycle sehingga dapat menekan biaya produksi. Metode yang akan dipakai untuk pelaksanaan rencana tersebut yaitu: tahapan perencanaan, pelaksanaan program dan pendampingan sampai evaluasi kegiatan mitra. Hasil pengabdian yang dilakukan dengan teknologi tepat guna berupa mesin pengayak pasir yaitu kebutuhan pasir silika baru mencapai 25 ton per bulan, berkurang menjadi 16 ton per bulan setelah alat diterapkan. Hal ini menunjukkan efisiensi penggunaan pasir silika daur ulang sebesar 9 ton per bulan. Meskipun harga pasir silika tetap Rp. 800.000,- per ton, total biaya pembelian menurun dari Rp. 20.000.000,- menjadi Rp. 12.800.000,- per bulan, sehingga penghematan biaya perbulan dapat dicapai sebesar Rp. 7.200.000,- atau 36% dari total biaya sebelumnya.
IMPLEMENTASI MESIN PENGOLAH SLURRY MENGGUNAKAN ENERGI BIOMASSA KAPASITAS 30 KG UNTUK MENINGKATKAN PRODUKSI PUPUK KOMPOS BAGI BUMP PT LUMPANG SEMAR SEJAHTERA Friska Ayu Fitrianti; Adeguna Ridlo Pramurti; Ahmad Mamba'udin; irin Mirrah Luthfia; Bagus Yunianto Wibowo
Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Vol. 7 No. 1 (2026): Vol. 7 No. 1 April 2026
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/sitechmas.v7i1.7062

Abstract

Kegiatan pengabdian kepada masyarakat ini dilaksanakan untuk mengatasi permasalahan limbah slurry dari aktivitas peternakan yang berpotensi mencemari lingkungan. Slurry memiliki kandungan unsur hara yang bermanfaat, namun pemanfaatannya masih terbatas karena belum tersedianya teknologi pengolahan yang praktis dan efisien. Solusi yang ditawarkan adalah implementasi mesin pengolah slurry berbasis energi biomassa dengan kapasitas 30 kg. Metode pelaksanaan meliputi sosialisasi teknologi pengolahan slurry, penyerahan bantuan mesin pengolah slurry, serta pendampingan pelatihan pengoperasian dan perawatan kepada kelompok mitra. Hasil kegiatan menunjukkan bahwa mesin mampu beroperasi optimal serta menghasilkan ±25 kg pupuk organik per siklus. Selain itu, peserta pelatihan dapat mengoperasikan mesin secara mandiri setelah mengikuti dua kali praktik langsung. Implementasi teknologi ini tidak hanya menekan potensi pencemaran akibat pembuangan slurry langsung ke lingkungan, tetapi juga memberikan nilai tambah ekonomi melalui produksi pupuk organik serta mendorong kemandirian energi masyarakat.
Co-Authors Abdul Syukur Alfauzi Adam Zuyyinal Adib Adeguna Ridlo Pramurti Ahmad Hamim Su’udy Ampala Khoryanton Anoeng Prasetyo Atikah Ayu Janitra Avicenna An-Nizami Bagus Yunianto Wibowo Bambang Tjahjono Dianisa Khoirum Sandi Elfrida Rizky Riadini Elfrida Rizky Riadini Evan Bagas Satya Farika Tono Putri Friska Ayu Fitrianti Friska Ayu Fitrianti Sugiono Hery Tristijanto Ignatius Gunawan Widodo Irin Mirrah Luthfia Muhammad Akhsin Muflikhun Muhammad Showi Nailul Ulum Nurhidayati Nurhidayati Padang Yanuar Riles Melvy Wattimena Riles WM Slamet Priyoatmojo Sri Harmanto Sugeng Irianto Tegar Aprilio Mahendra Timotius Anggit Timotius Anggit Kristiawan Trio Setiyawan Wahyu Isti Nugroho Yuris Bahadur Wirawan Yuris Bahadur Wirawan yuris wirawan Zaenal Abidin