Control system of grinding machine

Details Control system of grinding machine Control system of grinding machine

1989-10-04

1991-06-18

Rose, Robert A.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

511659, B24B 4902

Patent

active

050240250

ABSTRACT:
A control system is provided in a grinding machine composed of an axially movable rotational shaft having a grinding tool and being supported magnetically by electromagnets. The control system includes a target position modifying controller for modifying or shifting a reference target levitating position of the rotational shaft in a retreating direction away from a workpiece reaches a predetermined amount. The control system further includes a rigidity modifying controller operative during quick feed operation of the rotational shaft for making a rigidity of the rotational shaft lower than that in the grinding operation by adjusting exciting currents of the electromagnets. The control system still further includes a dressing controller operative during dressing of a new grinding tool for detecting that the grinding tool begins to touch a dresser and for judging that the dressing is completed just when an arithmetic value calculated based on the detection reaches a predetermined value.

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