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All Journal IPTEK The Journal for Technology and Science Prosiding Semnastek JTT (Jurnal Teknologi Terpadu) Turbo : Jurnal Program Studi Teknik Mesin Machine : Jurnal Teknik Mesin Martabe : Jurnal Pengabdian Kepada Masyarakat Manutech : Jurnal Teknologi Manufaktur Jurnal Teknik Mesin Indonesia Budimas : Jurnal Pengabdian Masyarakat International Journal of Educational Review, Law And Social Sciences (IJERLAS) International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) Jurnal Teknologi Dulang: Jurnal Pengabdian Kepada Masyarakat Prosiding Seminar Nasional Inovasi Teknologi Terapan Jurnal Inovasi Teknologi Terapan International Journal Of Synergi In Law, Criminal And Justice
Robert Napitupulu
Politeknik Manufaktur Negeri Bangka Belitung
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ANALISIS KEKASARAN PERMUKAAN BAJA SKD-11 PADA PROSES CNC TURNING MENGGUNAKAN METODE TAGUCHI Rabinaswil Samuel Napitupulu; Robert Napitupulu; Husman Husman
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 01 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

The machining process achieved with a CNC–Turning type SL25 B/500 based on the minimum surface roughness value, the reason for setting the variables smooth but contrary to the processing time because the longer the machining, the smoother the results. On the other hand, the longer the machining process, the more the costs involved. The research that has been conducted aims to determine the contribution of the CNC Turning process variables type SL-25 B/500 to reduce variations in the response of the workpiece surface roughness. This research also wants to achieve the suitable setting of the work variable of the SL-25 B/500 CNC turning machine to obtain the minimum (smaller is better) using a surfafe roughness test tool. The work variable that we want to work on are spindle rotation, feeding depth, and feeding motion. We determined the experiment design based on the Taguchi method and an orthogonal L18 matrix (21 x 37). Then to avoid interference, replication was carried out 2 times. This research proves the precise and accurate combination of work variable parameter settings to achieve the minimum surface roughness are spindle rotation of 640 put/min, feeding depth of 1 mm, and feeding motion of 0.05 mm/rev. The average of the surface roughness using the initial settings in the 16th combination experiment is 1,362 m.
Analisis Hubungan Getaran dan Kekasaran Permukaan pada Proses Pembubutan Baja ST60 Haradat Tahrir Algaza; Robert Napitupulu; Erwansyah Erwansyah
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 2 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i2.426

Abstract

This study aims to analyze the relationship between vibration and surface roughness in the turning process of ST 60 steel. The turning process was carried out by varying machining parameters, namely depth of cut, spindle speed, and feed rate. An experimental method was employed using eight combinations of cutting parameters. The material used was cylindrical ST 60 steel. Vibration measurements were performed using a VibraPort 80, while surface roughness measurements were conducted using a Mitutoyo SJ-210 surface roughness tester. The results show that workpiece number 1 produced the best surface quality with a surface roughness (Ra) value of 1.42 µm. In contrast, workpiece number 8 exhibited the poorest surface quality with an Ra value of 3.12 µm. The differences in surface quality were influenced by the combination of turning parameters that led to increased vibration during the cutting process. These results indicate that vibration plays an important role in determining the final surface quality. Therefore, proper control of turning parameters is required to minimize vibration and achieve optimal surface quality in the turning of ST 60 steel.
Analisis Hubungan Getaran dan Kualitas Kebulatan Pada Proses Pembubutan Baja ST60 Anselmus Agung Wilko Yonico; Robert Napitupulu; Nanda Pranandita
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 2 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i2.427

Abstract

This study aims to analyze the relationship between machine vibration and roundness quality in the turning process of ST 60 steel. An experimental method was conducted by varying three main cutting parameters: depth of cut (2 mm and 3 mm), spindle speed (700 RPM and 995 RPM), and feed rate (0.7 mm/rev and 1 mm/rev). Vibration was measured using a vibrameter (VibraPort 80), while roundness quality/surface roughness (Ra) was measured using a micrometer and a surface roughness tester. The results indicated that the increase in vibration intensity is directly proportional to the increase in surface roughness/roundness values, with vibration acting as a mediator that degrades the quality of the turning results. Feed rate was identified as the most dominant parameter affecting both vibration and roundness quality. Increasing the feed rate from 0.7 to 1 mm/rev expanded the tool path markers, resulting in a coarser surface. Conversely, higher spindle speeds tended to produce a more stable cutting process and dampen vibrations, although extreme RPMs could trigger chatter. The conclusion shows that vibration control through parameter optimization, particularly the use of low feed rates and stable high RPMs, is crucial for achieving precision in ST 60 steel turning with an optimal Ra value below 1.5 μm.
PENERAPAN CORRECTIVE MAINTENANCE PADA MESIN PRESS KELAPA SAWIT DI PT GSBL DENGAN METODE 5 WHY Steven Leonardo; Yudi Yudi; Robert Napitupulu; Angga Sateria
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 6 No. 1 (2026): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

The screw press machine is a main piece of equipment in the palm oil processing process, functioning to extract oil from palm fruit. Machine damage can reduce productivity, increase downtime, and disrupt the production process. This final project aims to identify damage to the screw press machine at PT. Gunung Sawit Bina Lestari, analyze the causes of damage using the 5 Why method, and implement corrective maintenance as a repair action. The method used is descriptive with a case study approach. Data were obtained through observation, interviews, documentation, and literature study. The results showed that the main damage occurred to the screw press, bushing hollow lengthening, and hydraulic motor rubber coupling. The 5 Why analysis showed that screw press damage was caused by excessive workload and the component's service life approaching the hour meter limit, bushing damage was caused by insufficient lubrication and the absence of scheduled maintenance, while rubber coupling damage was caused by hydraulic pressure exceeding the standard. Corrective maintenance was carried out through disassembly, inspection, cleaning, lubrication, replacement of damaged components, and machine testing. The repair results showed that the machine returned to stable operation, vibration was reduced, the hydraulic system functioned normally, and the pressing process operated properl.
ANALISIS KERUSAKAN SISTEM KELISTRIKAN DAN MEKANIK MESIN FRAIS ACIERA F3 METODE 5 WHY Radittiansyah Radittiansyah; Rezqi Al Ghifari; Robert Napitupulu; Pristiansyah Pristiansyah
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 6 No. 1 (2026): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

A milling machine is an essential machine tool in practical laboratory activities due to its ability to produce components with high precision. However, excessive use and aging of the machine can lead to failures that reduce its performance and disrupt learning activities. This study was conducted to analyze and identify the root causes of failures in the mechanical and electrical systems of the Aciera F3 milling machine using the 5 Whys approach. The research methodology involved direct observation, interviews with technicians, visual inspections, and electrical testing using a multimeter and test pen. The 5 Whys method is a root cause analysis technique that identifies the underlying causes of a problem by repeatedly asking the question "why" until the fundamental cause is determined. This approach helps reveal the relationship between observed symptoms and their actual causes, enabling appropriate corrective actions to be established. The results indicate that the 5 Whys method is effective in supporting the identification of root causes and the development of suitable corrective maintenance measures. After the corrective actions were implemented, the system was able to operate normally again, and the machine could be used according to operational standards.
PENERAPAN METODE AQUEOUS PADA PROSES PENCUCIAN BEARING DALAM KEGIATAN PEMELIHARAAN MESIN DI PT TIMAH TBK UNIT SUNGAILIAT Marsela Abid Fajri Amarona; Okta Ibra Saputra; Robert Napitupulu; Zaldy Kurniawan
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 6 No. 1 (2026): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

Bearing is a shaft-supporting component that withstands radial and axial loads, making its cleanliness crucial for machine reliability. At PT Timah Tbk Unit Sungailiat, bearing cleaning is still carried out manually using diesel fuel, a method that is time-consuming, dependent on operator skills, and poses risks to health and safety. This final project applies a bearing washing machine with an agitation system based on aqueous cleaning, which uses water-based solutions combined with industrial detergents, as a safer and more efficient alternative. The construction includes the frame, power transmission system, main shaft and taper, bearing housing and seal, as well as a locking plate, which are then assembled and tested through no-load functional tests, load functional tests, and cleaning effectiveness tests on ball bearings and cone bearings. Additional evaluation was conducted through questionnaires with 13 respondents regarding design, ease of operation, cleaning effectiveness, work efficiency, and safety. The results show that the machine operated properly in both no-load and load tests. The average cleanliness level of bearings reached more than 90% within 10–15 minutes of washing. User evaluation scores were: ease of operation 4.6; design and ergonomics 4.3; cleaning effectiveness 4.4; work efficiency 4.3; and safety 4.0. Therefore, aqueous cleaning is feasible to be applied as an alternative to conventional cleaning methods, as it is more effective, safer for operators, and environmentally friendly, although improvements in safety and equipment stability are still required.
Co-Authors Abda Abda Adhe Anggry Aldi Pratama Angelika, Vanessa Angga Sateria Anselmus Agung Wilko Yonico Aqila Zanjabila Ariansyah Ariansyah, Ariansyah Ariel, Ariel Arif Wahyudi Ariyanto Ariyanto Arliansyah, Arul Arriyani, Yang Fitri Benny Nainggolan Better Swengky chardova, andreas Christianty, Licia Clara Lavita Angelina Darta, Yuli Devaned Parlindungan Dharta, Yuli Diviya Arsieka Putri Doni Dyas Ryfkiansyah Efata Anugrah Harita Efata Anugrah Harita Eko Yudo Erin Aftarini Erwansyah, Erwansyah Fadhlurrahman, Miftah Febri Sulistiyo Febrian Arif Ferdian, Ferdian Feriadi, Indra Firdi Irawan Gemanial, Juan Gilang Perdana Haikal ikhsan, Muhammad Haradat Tahrir Algaza Harita, Revival Praise Harwadi, Harwadi Hasdiansah, Hasdiansah HERMANSYAH RHOMADAN Hernawan, Sutrisno Husman Husman Idiar Indradewa, Rhian Irawan, Rizki Jekki Dodi Parlindungan Sihombing Juanda Juanda Juanda Kasim Kris Josua Pardede Kris Josua Pardede Kris M Romario4 M. Haritsah Amrullah M. Luqman Hakim Siregar Mar'i Akbar, Firzan Marsela Abid Fajri Amarona Masdani, Masdani Meidiantara , Muhammad Rizki Muhammad Akbar Muhammad Bahit Muhammad Haritsah Amrullah Muhammad Yunus Muharramin, Areza Nanda Pranandita Nurwijayanti Okta Ibra Saputra Pranata, Yogi Pratama, Adrian Deka Pratama, Randa Julio Pristiansyah, Pristiansyah Purma , Purma Rabinaswil Samuel Napitupulu Radittiansyah Radittiansyah Reni Febrianti Rezqi Al Ghifari Ridho Bagus Purwansyah Rio, Rio Pratama Rodika Roland Banjarnahor Roperiadi RR. Ella Evrita Hestiandari Rullyansyah Samosir, Reguel Saputra, Benediktus Handaru Sateria, Angga Shanty Dwi Krishnaningsih Shanty Dwi Krisnaningsih Shanty Dwi Krisnaningsih Sihombing, Risna Primauli Simangunsong, Kristian Jubatner Sitinjak, Harpois S Soepangkat, Bobby Oedy Pramoedyo Sri Devi Zebua Steven Leonardo Subkhan Subkhan Sugianto Sugianto Sukatin, Sukatin Suzen, Zaldy Sirwansyah Syaiful Asmi Hasibuan, Syaiful Asmi Triyanto, Romy Ade Utrechk Ricardo Yasmirah Mandasari Saragih Yudi Yudi Yuli Dharta Yuliyanto Yuliyanto Yuspita, Ni Luh Eta Zaldy Kurniawan