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All Journal Jurnal Rekayasa Mesin Otopro Jurnal Teknik Mesin Sinergi Majalah Teknik Industri Jurnal Polimesin
Roberth Marshall Ratlalan
Akademi Komunitas Industri Manufaktur Bantaeng
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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VARIASI PARAMETER GAYA POTONG MESIN BUBUT GEDEE WEILER LZ 330 G PADA WORKSHOP PRODI TEKNIK PERAWATAN MESIN AK - MANUFAKTUR BANTAENG Roberth Marshall Ratlalan
Jurnal Rekayasa Mesin Vol 14, No 3 (2019): Volume 14, Nomor 3, Desember 2019
Publisher : Jurusan Teknik Mesin - Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (428.229 KB) | DOI: 10.32497/jrm.v14i3.1640

Abstract

Penelitian ini dianalisis untuk mengetahui setiap gaya pemotongan pada mesin permesinan konvensional mesin bubut GEDEE WEILER LZ 330 G dimana tiap kondisi putaran, kedalaman potong yang bervariasi untuk setiap gerak pemakan yang selalu konstan. Setiap pengujian terjadi perubahan tiap variasi putaran menunjukkan apabila semakin besar putaran, maka gaya pemotongan yang terjadi akan mengalami penurunan. Sedangkan apabila kedalaman potong relatif kecil maka akan berpengaruh terhadap putaran gaya potong. Hasil  pengujian putaran gaya pemotongan untuk rata – rata putaran gaya pemotongan putaran (rpm) 450 = 928,43 N Untuk putaran gaya pemotongan untuk putaran (rpm) 900 = 1846,83 N dan putaran (rpm) untuk gaya pemotongan 1800 = 3621,83 N. Rata – rata kedalaman pemotongan 0,25 = 1881 mm. Untuk kedalaman pemotongan untuk kedalaman potong 0,50 = 1832 mm, dan untuk kedalaman pemotongan 1,00 = 1856 mm.
Desain Prototipe Handwell Universal Tool Grinding Machine Menggunakan Konsep Manufaktur Teknologi 3D Printer Roberth Marshall Ratlalan
Jurnal Teknik Mesin Sinergi Vol 20, No 1 (2022): April 2022
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (529.013 KB) | DOI: 10.31963/sinergi.v20i1.3408

Abstract

Abstract : The presence of the manufacturing world has brought a huge impact on the progress of science and technology in the industry which is currently growing rapidly, especially in the field of industrial automation. Additive Manufacturing known as 3D printing Technology in its philosophy of helping humans in completing every task by playing a very important role in product development, prototyping, and manufacturing process.The results of the manufacturing process using a 3D printer are very good, where the design results can be translated to a 3D Printer and produce objects that match the design results from the software inventor. Success in this manufacturing process is obtained from the results of setting the 3D printer parameters during the proper slicing process, such as setting material temperature, support, printer speed, fan speed, layer thickness (quality), wall thickness (Shell), Infill (filler). and others. Keywords: Prototype Design, 3D Printer, Manufacturing Process
LEVELLING MESIN BUBUT LZ 330 G MENGGUNAKAN ALAT UKUR SPIRIT LEVEL Roberth Marshall Ratlalan; Nurisma Maharani
Otopro Vol 18 No 2 Mei 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v18n2.p71-76

Abstract

The leveling process is the initial stage before operating a lathe. The test will be carried out if the flatness on the machine and the results have deviated greatly, it must be leveled on the lathe. This study aims at a high level of accuracy of machine tools in the form of leveling on three types of Gedee Weiler LZ 330 G lathes located at the AK-Manufaktur Bantaeng Manufacturing Workshop. This type of research is categorized as quantitative research which is an inductive, objective and scientific method in which the data is processed in the form of numbers or statements which are then analyzed. Data from the test results of the M1 lathe with the longitudinal tilt direction towards the off head, while in the transverse position the slope direction is towards the rear slide. Flatness deviation reaches 1.06 mm in the longitudinal position and 0.15 mm in the transverse position. For the M2 lathe, the direction of the longitudinal slope is the direction of the off head, while in the transverse position, the direction of the slope of the fore runway. Deviation of flatness reaches 1.3 mm in the longitudinal position and 1.75 in the transverse position and the M3 lathe with the longitudinal slope direction towards the off head, while in the transverse position the slope direction is towards the front of the runway. Flatness deviation reaches 1.65 mm in the longitudinal position and 10.15 mm in the transverse position.
Meningkatkan Kapasitas Produksi Menggunakan Konsep Lean Manufacturing Dan Waste Assessment Model Roberth Marshall Ratlalan
Majalah Teknik Industri Vol 27 No 2 (2019): Majalah Teknik Industri Desember 2019
Publisher : Unit Penelitian dan Pengabdian Masyarakat (UPPM) Politeknik ATI Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Salah satu perusahaan industri manufaktur nasional yang bergerak dalam pembuatan produk militer dengan produk yang dihasilkan adalah plastic box 260. Pada proses perakitan masih ditemukan beberapa waste yang terjadi. Untuk meminimize waste yang terjadi digunakan pendekatan Lean Manufacturing dengan dibantu oleh salah satu alat dalam konsep lean yaitu Value Stream Mapping yang bertujuan menggambarkan keseluruhan informasi dari aliran produk bahan baku sampai produk jadi. Identifikasi waste yang diawali dengan Waste Relationship Matrix (WRM) dan Waste Assessment Questionnaire (WAQ) untuk mengetahui presentase waste terbesar. Hasil presentase WRM tertinggi sebesar 20 % untuk From Overproduction, inventory dengan nilai sebesar 15 % disimpulkan waste overprodcution dan waste inventory sangat memiliki pengaruh yang cukup besar ke waste yang lain. Sedangkan Hasil rekapitulasi WAQ waste yang mempunyai nilai terbesar dan sering terjadi yaitu waste inventory dengan nilai presentase sebesar 26,13 %, waste Overproduction 22,85 % dan waste motion 12,30 %.
Effect of internal geometry on the tensile strength of SLA-printed resin using a formlabs 3D printer Roberth Marshall Ratlalan; Muh Farid Hidayat
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.6605

Abstract

Stereolithography (SLA) is developing rapidly as a 3D printing technology in manufacturing high precision resin-based parts.  This research investigates the influence of internal geometry on the tensile strength of samples printed with a Formlabs SLA printer using dental resin. Three types of internal geometries of solid control, triangular lattice, and honeycomb lattice were compared and evaluated. Samples were designed using Autodesk Inventor according to ASTM D638 standards and printed with symmetry axis dimensions of 5 mm and 10 mm and a consistent thickness of 5 mm. Tensile testing was conducted to analyze the influence of resin material type, internal geometry design, and dimensional parameters on their mechanical properties. The results showed that the solid internal geometry achieved the highest average tensile stress of 33.33 MPa meanwhile the triangular geometry with 5 mm configuration exhibited superior tensile performance compared to the honeycomb design.
Co-Authors Muh Farid Hidayat Nurisma Maharani