Feedback controller for NC controlled machine tools
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United States of America Patent
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-
Apr 14, 1992
Grant Date -
N/A
app pub date -
Oct 31, 1990
filing date -
Nov 8, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a feedback controller for NC controlled machine tools, the position and the velocity of a work is detected and compared with the desired position. By this comparison, the work velocity is calculated and compared with the current velocity, which determines torque of a driving motor. A torque compensation signal generator, receiving the current velocity, generates a compensation signal according to a predetermined velocity/torque function. The signal is composed with a torque signal passed to a driving motor, and torque compensation is performed. A periodic reaction detector detects periodic fluctuation of the work caused by periodic load fluctuation, and a torque compensation direction causes a signal generator to suppress the fluctuation at desired occasions.
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