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All Journal Jurnal Technopreneur (JTech) EDUCATIONE: Journal of Education Research and Review
Nodi Poluan Sompie
Politeknik Negeri Manado
Agriculture, Biological Sciences & Forestry Computer Science & IT Education Energy Mechanical Engineering Social Sciences Other

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ANALISIS PENGARUH VARIASI BENTUK SAMBUNGAN LAS LISTRIK TERHADAP SIFAT MEKANIK PELAT STAINLESS STEEL 304L Nodi Poluan Sompie; Jedithjah Naapia Tamedi Papia; Adrian Maidiangkay
Jurnal Technopreneur (JTech) Vol 10 No 2 (2022): JURNAL TECHNOPRENEUR (November)
Publisher : UPPM Politeknik Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30869/jtech.v10i2.944

Abstract

Tujuan penelitian ini adalah untuk mengetahui Pengaruh Variasi Sambungan Las Listrik Terhadap Sifat Mekanik Pelat Stainless Steel 304L. Kegiatan penelitian dilakukan di Laboratorium Teknik Mesin Politeknik Negeri Manado. Pembentukan specimen uji tarik disesuaikan standar ASTM-E8. Penelitian ini dapat disimpulkan bahwa pemilihan diameter elektroda dan arus las sangat mempengaruhi kekuatan tarik las. Tegangan tarik maksimum rata-rata tertinggi untuk bahan tanpa las (bahan normal) sebesar ( σu ) = 657,6 (N/ mm2) .atau 65.7 (Kg/mm2). Untuk bahan hasil pengelasan lap joint tegangan tarik maksimum sebesar ( σu ) = 385,6 (N/ mm2) untuk sambungan butt joint tegangan tarik maksimum sebesar ( σu ) = 675,2 (N/ mm2) dan untuk sambungan fillet joint tegangan tarik maksimum rata-rata sebesar ( σu ) =672,2(N/ mm2). Dari pengelasan tersebut dapat diketahui dimana sambungan las sudut (Fillet joint) lebih tinggi nilai kekuatan tarik dibandingkan sambungan,las tumpang (lap joint), las Temu (Butt joint) dan benda uji tanpa lasan.
EVIDENCE-CLASSIFIED DIAGNOSIS OF INTERCONNECTED IGNITION-COIL, CONNECTOR, AND CONTROL-UNIT DRIVER FAULTS Joyfull Sidney Payumi; Nodi Poluan Sompie; Franklin Bawano
EDUCATIONE Volume 4, Issue 2, July 2026
Publisher : CV. TOTUS TUUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59397/edu.v4i2.293

Abstract

Coil-on-plug (COP) ignition faults can involve the coil, connector, harness, and electronic control unit (ECU), yet a single workshop case cannot establish the initiating component or transient chronology. This evidence-classified diagnostic case examined one Daihatsu Xenia 1.0 Non-VVT-i with an EJ-DE three-cylinder gasoline engine presenting vibration, misfire, reported loss of power, and reported increased fuel consumption. The available field record documented visual inspection, multimeter observations of supply and ignition trigger/feedback (IGT/IGF) lines, coil substitution, guarded substitution with a known-good ECU, on-board diagnostics II (OBD-II) scanning, internal ECU and connector inspection, corrective repair, and preliminary workshop verification. The multimeter did not detect comparable IGT/IGF indications on cylinders 2 and 3; replacing the suspected coils did not resolve the symptoms; and the donor ECU displayed diagnostic trouble codes (DTCs) P0300, P0352, P0353, and P0171. Degraded female connector contacts and visible damage along the original ECU ignition-driver path were subsequently observed. Repair of the documented defects was followed by restored continuity and stable operation during an unspecified workshop observation period. The evidence supports system-level diagnosis of an interconnected coil-connector-ECU fault, but not a proven cascade from coil switching to ECU damage. The principal contribution is a transparent reporting framework that separates direct observation, diagnostically supported interpretation, and unmeasured mechanism. The case also provides a safety-conscious diagnostic sequence for workshop and proposed vocational-learning use.
Co-Authors Adrian Maidangkay Franklin Bawano Jedithjah Naapia Tamedi Papia Joyfull Sidney Payumi