Metallographic polisher with speed control

Details Metallographic polisher with speed control Metallographic polisher with speed control

1974-06-27

1976-02-03

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

B24B 5500

Patent

active

039356779

ABSTRACT:
A metallographic polisher includes a control circuit for providing a selectable constant speed for the polisher under varying load conditions. A tachometer provides electrical signals representative of the speed of rotation of a polishing wheel, which signals are compared with signals representing a selected speed to provide drive signals to the polisher motor and speed indicating means. A limit circuit is provided to limit the motor speed such that it will not exceed a predetermined limit above the preselected speed thereby protecting the specimen being polished in the event of a power or component failure.

REFERENCES:
patent: 3441826 (1969-04-01), Mason
patent: 3704556 (1972-12-01), Nedreski
patent: 3835357 (1974-09-01), Holzer

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