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Variable speed control of weight stacks in 3 kN force standard machine
Toshiyuki Hayashi,Yoshihisa Katase,Hiroshi Maejima,Yukio Yamaguchi,Kazunaga Ueda 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In calibrations of force measuring instruments using dead-weight type force standard machines, increasing the moving speed of dead-weights in linkage-weight stacks generally improves working efficiency but makes the calibration uncertainty worse due to oscillation of the weights. This conflict can be solved by introducing variable speed control of the linkage-weight stacks to drive the weights quickly in most loading/unloading processes and reduce the speed only when the moving weight comes close to a neighboring weight. Thus, variable speed control reduces the calibration time and prevents weight oscillation. The 3 kN dead-weight type force standard machine of NMIJ has already been equipped with AC servo motors for weight actuation, and variable speed control can be realized by modifying the existing control software. This report describes the design and results of the modification.
Kawashimo, Takashi,Doyo, Daisuke,Yamaguchi, Tatsuya,Nakajima, Ryosuke,Matsumoto, Toshiyuki Korean Institute of Industrial Engineers 2015 Industrial Engineeering & Management Systems Vol.14 No.2
The recent manufacturing industry in Japan has found it difficult to transfer skills from trained workers to inexperienced workers because the former ages and then retires. This is a particular problem for lathe process, as this operation requires explicit and tacit knowledge, and defining the skills clearly in a manual is difficult. This study aims to develop a training system for lathe operation by using a simulator; this includes formulas that help define the relationship between the speed of tool feed and cutting sound/shape of chips which were proposed in the preceding study. The developed training system is verified the effectiveness.
Takashi Kawashimo,Daisuke Doyo,Tatsuya Yamaguchi,Ryosuke Nakajima,Toshiyuki Matsumoto 대한산업공학회 2015 Industrial Engineeering & Management Systems Vol.14 No.2
The recent manufacturing industry in Japan has found it difficult to transfer skills from trained workers to inexperienced workers because the former ages and then retires. This is a particular problem for lathe process, as this operation requires explicit and tacit knowledge, and defining the skills clearly in a manual is difficult. This study aims to develop a training system for lathe operation by using a simulator; this includes formulas that help define the relationship between the speed of tool feed and cutting sound/shape of chips which were proposed in the preceding study. The developed training system is verified the effectiveness.