Control system of grinding machine

Details Control system of grinding machine Control system of grinding machine

1990-10-31

1992-07-28

Rose, Robert A.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

5116587, 125 1118, 125 1121, 125 1102, B24B 5304

Patent

active

051331586

ABSTRACT:
The 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.

REFERENCES:
patent: 3209494 (1965-10-01), Seidel
patent: 4085554 (1978-04-01), Sugita
patent: 4180946 (1980-01-01), Heijkenskjold et al.
patent: 4956945 (1990-09-01), Ooshima
Soviet Inventions Illustrated, Second Mechanical, week 85-17, 9 Jun. 1985, Derwent Publications Ltd., London, GB.

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