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Adi Syahputra Purba
Politeknik Negeri Batam
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Journal : Journal of Applied Mechanical Technology (JAMET)

 1 
Perbandingan Variasi Power Dalam Proses Laser Engraving Terhadap Hasil Produk Stainless Steel Purba, Adi Syahputra; Hermawan, Muhammad Ghandy Razzaki; Manurung, Meilani Mandhalena; Stefani, Windy; Dzulfiqar, Mohamad Alif; Gunawan, Leo Van
Journal of Applied Mechanical Technology Vol 2 No 1 (2023): Journal of Applied Mechanical Technology (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (808.105 KB) | DOI: 10.31884/jamet.v2i1.29

Abstract

Marking machining processes using lasers have developed in the industrial world. Having high precision and good final quality is one of the advantages of this laser machine. There is a thermal effect generated in the process, so we must understand the impact of the power applied to the material. Carry out the laser marking process with the engraving method on a stainless steel plate material which is given a variation of strength to observe the difference in the final result of a marking. Make as many as 3 pcs of products for each variation of power parameters. The product that has been produced will also be observed for surface roughness on the marking, which aims to find out how deep the food is from the marking. Observation of the surface roughness of the marking on the product using the Surface Roughness Tester 3 times for each product. The results of the data that have been taken will only be observed and entered into the marking results into the roughness class according to ISO or DIN 4763:1981. The marking process uses power variations of 20%, 40%, 60%, 80% and 100%. The results of the marking with the lowest power of 20% produce markings with a roughness value of 0.029µm – 0.110µm and enter into class N3 while the results of marking with the greatest power of 100% obtain a roughness value of 18.210µm – 19.876µm which is included in the roughness class N10. Based on the data obtained in the engraving process with different power variations, it can be interpreted that the higher the power supplied, the higher the roughness value
Studi Kasus Penjadwalan Proyek: Frame Acid Skid dengan Gant Chart dan Critical Path Method Pujo Leksonowati, Nur Fitria; Pamungkas, Nurman; Stefani, Windy; Purba, Adi Syahputra; Manurung, Meilani Mandhalena; Batubara, Ninda Hardina; Gunawan, Leo Van
Journal of Applied Mechanical Technology Vol 3 No 1 (2024): Journal of Applied Mechanical Technology (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/journalofappliedmechanicaltechnology.v3i1.53

Abstract

This study examines the scheduling of the Frame Acid Skid project at the Lombok Steam Power Plant (PLTU) using Gantt Chart and Critical Path Method (CPM). The primary objective is to identify the causes of delays and propose optimization measures for the project duration. Data collected indicates a significant difference between the planned duration (24 days) and the actual project completion time (47 days). The main delays occurred in the welding and painting phases, each requiring an additional 13 days. Contributing factors include the addition of a welding process for materials not covered in the initial contract and specification mismatches in the painting phase. Analysis with Gantt Chart and CPM reveals that enhanced communication, more detailed initial planning, and strict monitoring of project specifications are crucial to minimize the impact of delays on cost and time. The results of this study provide a strong basis for decision-making in similar future projects.
Co-Authors Adhe Aryswan Adhitomo Wirawan Aditya Dwi Putra Fajar Ahmad Farhan, Ahmad Ahmad Hamim Thohari Amalia, Mutia Andaresta, Windy Annisa Fyona Ari Wibowo Baehaqi Batubara, Ninda Batubara, Ninda Hardina Budiman Budiman Butar, Hendra Butar Butar-Butar, Hendra Cahyo Budi Nugroho Cuana, Rona Danang Cahyagi Dimas Prasetyo Dupan, Pandi Dzulfikar, Mohamad Alif Erna Juwita Fajrin, Aulia Good Rindo Hanifah Widiastuti Hermawan, Muhammad Ghandy Razzaki Irdia Raihan, Haura Ismiyatun Nurjannah Ita Wijayanti Juliarni Kholilur Rahman, Kholilur Khollilurrahman, Kholillurrahman Kms M Avrieldi Lalu Giat Juangsa Putra Leksonowati, Nur Fitria Leo Van Gunawan Louisa Riaunal Sitompul, Dharma Manalu, Ari Angga Manurung, Agnes Br. Manurung, Meilani Manurung, Meilani Mandalena Marbun, Abri Andry Saresa Mega Fatimah Rosana Mega Gemala Meilani Mandhalena Manurung Mohamad Alif Dzulfiqar Mufariz, Mufti Fathonah Mufti Fathonah Muvariz Muhammad Zaenuddin Mutiarani Mutiarani MUTIARANI MUTIARANI Muvariz, Mufti Fathona Natanael Tampubolon, Franssius Naufal Abdurrahman Prasetyo Nidia Yuniarsih Ningsih, Tiwi Gustria Nugroho Pratomo Ariyanto Nur Fitria Pujo Leksonowati Nurman Pamungkas Nurul Fadilah, Nurul Nurul Laili Arifin Nurul Ulfah Putra, Gelby Anggara Rafly, Stevian Rahman Hakim Ramadhan, M. Noviriandi Rangga Saputra Ritonga, Fatima Sari Rohmat, Abdul Roza Puspita Sapto Wiratno Satoto Setyanang, Lovan Simanjuntak, Jefri Kemri Rodi Samuel Sugondo, Ebeng Tambunan, Efraim Windy Stefani Yusri Aksyaputra, Muhammad