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All Journal Jurnal Ilmiah Poli Rekayasa Ngabdimas
Ramadani Safitri
Politeknik Negeri Padang
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Environmental Science

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PENINGKATAN KINERJA MESIN PRESS BAGLOG JAMUR TIRAM MELALUI MODIFIKASI SISTEM KONTROL TEKANAN SILINDER MENGGUNAKAN MAGNET CLUTCH Junaidi -; Riki Rahman; Sir Anderson; Eko Priyanda; Ramadani Safitri
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.422

Abstract

Manual and semi-mechanical baglog production for oyster mushrooms in Indonesia, particularly in Padang West Sumatra, has suffered from low capacity, inconsistent quality, and operator fatigue. In this study evaluated performance improvements of a baglog pressing machine through modification of magnetic clutch integration and cylinder pressure control mechanism. The modification included installing a magnet clutch with supporting components (bushing, plate disk, clutch housing), motor and gearbox shafts, redesign of the pressing plate, and dual-opening chamber. Several technique was employed such as reducer speeds (30 to 90 rpm) and threaded rod adjustments distance (1.5 to 6.5 cm). Production capacity, cycle time, efficiency, and baglog density were investigated. Based on results, the  production capacity increased from approximately ±20 baglogs/hour (manually)to 120–270 baglogs/hour after modification, while the pressing cycle time decreased to as low as 13.33 s/baglog. The baglog density increased from about ±0.65 g/cm³ to ~0.709–0.900 g/cm³, with 80–90% process efficiency. Therefore, the magnetic clutch enabled precise engagement/disengagement control, enhancing safety and cycle precision. Overall, the modified machine provided an efficient for improving productivity, quality, and ergonomics for for SME’s sector mushroom production.
PERANCANGAN ALAT PEMECAH KULIT KEMIRI TIPE DOUBLE ROLL DENGAN BAHAN ST37 KAPASITAS 82 KG/JAM Sir Anderson; Zulhendri Zulhendri; Nasirwan Nasirwan; Ramadani Safitri; Pandu Abdi Salam
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.429

Abstract

Candlenut (Aleurites moluccana L. Wild) is an economically valuable plantation commodity in Indonesia; however, post-harvest handling is largely conducted using conventional shelling methods, which are inefficient and often cause seed damage, reducing quality and market value. Previous studies have investigated operational parameters of double roll shellers, such as rotational speed, roll spacing, and hopper width, yet most focused on one or two parameters in isolation, without comprehensively assessing the relationship between production capacity, shelling effectiveness, and kernel quality, nor comparing machine performance with traditional methods used by farmers. This research addresses that gap by designing and evaluating a double roll candlenut sheller made of ST37 steel with a target capacity of 82 kg/hour, considering production capacity, shelling efficiency, and kernel quality simultaneously. The design process included literature review, physical and mechanical characterization of candlenuts, structural and transmission system design, and calculations for power requirements and component safety. Results indicated that the maximum force required to shell two candlenuts simultaneously is 3,418.46 N, with a total machine power of 4,012.80 W (≈5.38 hp); applying a service factor of 1.2, a 6.5 hp gasoline engine was selected. Shafts, pulleys, V-belts, and gears were designed to ensure torque, shear stress, and deflection remain within safe limits. The machine operates at a roll speed of 150 rpm, achieves the targeted production capacity, and reduces kernel damage, thereby increasing the value of candlenuts for farmers. This integrated design approach provides a practical and efficient alternative to conventional shelling methods.
PENINGKATAN KETERAMPILAN GAMBAR TEKNIK SISWA SMK NEGERI 1 PADANG MELALUI PELATIHAN AUTOCAD Yuliarman; Elvis Adril; Nofriadi; Mulyadi; Ramadani Safitri; Ridwan
NGABDIMAS Vol. 8 No. 02 Desember (2025): Jurnal Ngabdimas Pengabdian Pada Masyarakat
Publisher : PPPM Institut Teknologi Pagar Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36050/pp0x7963

Abstract

Perkembangan teknologi digital pada era Revolusi Industri 4.0 telah mendorong perubahan signifikan dalam kebutuhan kompetensi tenaga kerja, khususnya di sektor industri manufaktur. Penguasaan perangkat lunak desain berbantuan komputer (Computer Aided Design/CAD) menjadi kompetensi penting yang harus dimiliki lulusan pendidikan vokasi agar mampu beradaptasi dengan tuntutan dunia industri. Namun, pada tingkat Sekolah Menengah Kejuruan (SMK), pembelajaran gambar teknik masih banyak dilakukan secara manual sehingga literasi digital siswa belum berkembang secara optimal. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pemahaman dan keterampilan dasar AutoCAD bagi siswa SMK sebagai upaya penguatan kompetensi digital di bidang teknik mesin. Mitra dalam kegiatan ini adalah SMK Negeri 1 Padang, dengan sasaran 15 siswa jurusan Teknik Mesin. Metode pelaksanaan meliputi ceramah interaktif, demonstrasi langsung penggunaan AutoCAD, serta praktik sederhana menggambar teknik menggunakan sistem koordinat. Hasil kegiatan menunjukkan adanya peningkatan pemahaman siswa terhadap konsep dasar AutoCAD, fungsi perintah utama, serta penerapannya dalam gambar teknik. Selain itu, kegiatan ini juga menumbuhkan motivasi belajar mandiri dan kesadaran siswa akan pentingnya penguasaan teknologi digital untuk menghadapi dunia kerja modern. Hasil pengabdian ini memiliki makna strategis dalam memperkuat literasi digital siswa SMK serta mempererat sinergi antara perguruan tinggi dan pendidikan vokasi dalam menyiapkan sumber daya manusia yang kompeten dan siap industri.
Co-Authors Eko Priyanda Elvis Adril Junaidi - Mulyadi Nasirwan Nasirwan Nofriadi Pandu Abdi Salam Ridwan Riki Rahman Sir Anderson Yuliarman Zulhendri Zulhendri