Position control device and position control method for machine tools
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United States of America Patent
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Apr 29, 2008
Grant Date -
Feb 10, 2005
app pub date -
Aug 3, 2004
filing date -
Aug 6, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A machine tool moves a driven member by use of a servomotor. A position control device controls the position of the driven member in accordance with full closed loop control. The position control device computes an integrated feedback value g in correspondence with a function F (V.sub.M, P.sub.M, V.sub.m, P.sub.m) in which four state amounts, motor speed V.sub.M, motor position P.sub.M, driven member speed V.sub.m, and driven member position P.sub.m are independent variables. The thrust instruction .tau.*, which is inputted to the servomotor, is compensated with the integrated feedback value g. The servomotor is thus optimally driven and controlled in accordance with full closed loop control.
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