Apparatus and method for detecting a tool edge

Details Apparatus and method for detecting a tool edge Apparatus and method for detecting a tool edge

1986-09-02

1987-06-30

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

5116577, 5116587, 5116588, 51281R, 324 61R, B24B 4900

Patent

active

046760300

ABSTRACT:
A force transducer and circuit are used to detect the edge of a rotating grinding wheel. The force transducer produces an output signal indicative of a force applied thereto. The output signal is filtered by a high pass filter coupled to the output of the transducer. The amplitude of the filtered transducer output signal is compared to a reference value. An output pulse is produced if the amplitude reaches a predetermined level with respect to the reference value. A timer responsive to a first output pulse establishes a fixed interval during which the number of subsequent output pulses is counted. If the number of pulses counted during the fixed interval reaches a predetermined quantity, a control signal indicative of edge contact of the grinding tool with the force transducer is produced.

REFERENCES:
patent: 2957126 (1960-10-01), Wright
patent: 2971263 (1961-02-01), Rockafellow
patent: 4401946 (1983-08-01), Klimstra
patent: 4571892 (1986-02-01), Brill

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