Device for controlling the feed of machine tools
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United States of America Patent
Stats
-
Mar 30, 1982
Issued Date -
N/A
app pub date -
Jul 5, 1979
filing date -
Jan 16, 1976
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for controlling a DC motor driven screw feed which moves the table of a machine tool into prescribed positions including a plurality of limit switches which detect the position of the table, a rate change control circuit which receives signals from the limit switches and changes the rate of revolution of the DC motor when the table has reached prescribed rate change positions and a current limiting circuit which supplies the DC motor with a prescribed constant current and keeps the output torque of the DC motor at a prescribed level when the table has reached a prescribed dwell position.
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