Timotius Anggit Kristiawan, Friska Ayu Fitrianti Sugiono, Faiz Sholihul Amin, Boy Bistolen

MODIFIKASI SISTEM OTOMASI PADA SLIDING HOOD GUNA MENINGKATKAN EFISIENSI KERJA DAN MEMPERBAIKI NILAI ERGONOMI BAGI OPERATOR CNC CUTTING DI PT XYZ

Introduction

Modifikasi sistem otomasi pada sliding hood guna meningkatkan efisiensi kerja dan memperbaiki nilai ergonomi bagi operator cnc cutting di pt xyz. Otomasi sliding hood CNC di PT XYZ tingkatkan efisiensi kerja 18.6% & kurangi risiko ergonomi operator (skor RULA 7 ke 3). Solusi inovatif untuk produktivitas & kesehatan.

Abstract

The CNC cutting process at PT XYZ produces emissions and heat controlled by a sliding hood. However, its manual operation—requiring operators to push a 69.65 kg device up to 30 times daily—creates fatigue, discomfort, and low tool utilization. This highlights a gap where automation is often applied for efficiency but rarely combined with ergonomic improvements. This study aims to develop and test an automated sliding hood to increase efficiency and reduce ergonomic risks. The Shigley-Mitchell design methodology was applied, supported by observation, interviews, and performance testing before and after modification. Key indicators measured were cycle time, tool effectiveness, and ergonomic risk using the RULA method. Results showed a decrease in cycle time from 57.28 to 46.65 seconds (18.6% efficiency gain). Tool effectiveness rose from 27 to 44 successful operations out of 45, while RULA scores improved from 7 (high risk) to 3 (low risk), indicating a 58% ergonomic improvement. In conclusion, automating the sliding hood enhanced work efficiency, optimized equipment use, and improved ergonomic conditions. This demonstrates the value of integrating automation with ergonomic design to achieve productivity and health benefits in manufacturing.

Review

This paper presents a compelling case for integrating automation with ergonomic design, focusing on the modification of a sliding hood system for CNC cutting processes at PT XYZ. The authors identify a significant problem: the manual operation of a heavy (69.65 kg) sliding hood up to 30 times daily causes substantial operator fatigue, discomfort, and limits tool utilization. This highlights a critical, often overlooked, gap where efficiency-driven automation frequently fails to address concurrent ergonomic improvements. The study's objective to develop and test an automated system to concurrently enhance efficiency and mitigate ergonomic risks is therefore highly relevant and addresses a practical industrial challenge with broad implications for manufacturing environments. The methodology employed, leveraging the Shigley-Mitchell design approach alongside observational studies, interviews, and comprehensive pre- and post-modification performance testing, appears robust. The choice of key indicators—cycle time, tool effectiveness, and the RULA method for ergonomic risk assessment—provides a holistic view of the system's impact. The results are notably impressive and quantitatively demonstrate the success of the proposed automation. A significant 18.6% efficiency gain was achieved, with cycle time decreasing from 57.28 to 46.65 seconds. Furthermore, tool effectiveness remarkably improved from 27 to 44 successful operations out of 45, while the RULA score saw a dramatic 58% improvement, shifting from a high-risk score of 7 to a low-risk score of 3. In conclusion, this study effectively demonstrates the tangible benefits of a well-conceived automation solution that prioritizes both operational efficiency and operator well-being. The findings clearly indicate that automating the sliding hood not only enhanced work efficiency and optimized equipment utilization but also significantly improved ergonomic conditions for the CNC operators. The paper makes a valuable contribution by underscoring the critical importance of integrating ergonomic considerations into automation design from the outset, proving that productivity gains and improved health benefits are not mutually exclusive but rather synergistic outcomes achievable through thoughtful engineering. This work serves as an excellent model for other manufacturing facilities grappling with similar challenges.

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