Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1975-03-20
1976-07-27
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
5116587, B24B 5100
Patent
active
039711684
ABSTRACT:
A control apparatus for a machine tool having a tool support for supporting a tool for machining a workpiece movable relative to the workpiece is disclosed. The control apparatus includes pulse generating means for generating a train of pulse signals, a drive motor for moving the tool support relative to the workpiece in response to the pulse signals, first means for causing the drive motor to be actuated to move the tool support away from the workpiece, detecting means actuated when the tool support is moved into an original position and second means responsive to the actuation of the detecting means for causing the drive motor to be actuated to move the tool support toward the workpiece. The control apparatus further includes counter means responsive to the second means for counting the number of the pulse signals supplied to the drive motor, setting means for digitally setting a distance between the original position and a start position, and comparing means for comparing the contents of the counter means and the setting means and for generating a coincidence signal when the contents coincide to thereby stop the movement of the tool support.
REFERENCES:
patent: 3599376 (1971-08-01), Renner
patent: 3622287 (1971-11-01), Nagoya
patent: 3824743 (1974-07-01), Price et al.
patent: 3828477 (1974-08-01), Sanford
Nishimura Hideo
Otsu Ikuo
Toyoda Koki Kabushiki Kaisha
Whitehead Harold D.
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