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The Circular welding processes are often encountered in various manufacturing processes in the industrial production such as welding processes on the circular pipes frame, compressed tubes, distribution pipes and others. The manual circular welding process are often found welding defects, due to welding difficulties in the circular plane. To overcome this problem, it is necessary to make a workpiece turning tool in the validation process and the speed can be adjusted. The objective of research is to design and make control system of process sequence, speed and accuracy of the welding process termination in the pipe welding process. The research methodology is preseded by initial literature review, analysis of control system requirements, Jurnal CRANKSHAFT, Vol. 2 No. 2 September 2019 ISSN: 2623-0720 (Print), 2623-0755 (Online) 52 control system design, manufacturing and testing of tools. The result was welding aids on circular workpieces have been made successfully. Some manufacturing process parameters was displayed on the LCD. The welding speed of the workpiece on the LCD display compared to testing with a tacho meter has a percentage of errors ranging from 1.5 ~ 1.7% and 1.75 ~ 2% in the test range between 860 ~ 400 rpm.

RANCANG BANGUN SISTEM KONTROL KECEPATAN DAN KETEPATAN PENGHENTIAN PROSES PENGELASAN PADA PROSES PENGELASAN PIPA