Automatic lapping control

Details Automatic lapping control Automatic lapping control

1997-11-19

1999-09-07

Eley, Timothy V.

Abrading

Precision device or process - or with condition responsive...

With indicating

451 1, B24B 4900

Patent

active

059477997

ABSTRACT:
Method for identifying, monitoring, and controlling the blank frequencies in each separate carrier of a planetary lap machine, based on measuring blank frequency signals via an electrode imbedded in a lap plate, analyzing the time frequency pattern of these signals as they pass the electrode, correlating it with the sequence of carriers passing the electrode, and from that identifying and correlating groups of signals with the loads of blanks in each carrier, then monitoring the frequencies and the frequency spread in each carrier and, optionally, terminating lapping when frequencies and spread in a carrier exceed a target value.

REFERENCES:
patent: 3994154 (1976-11-01), Niklas et al.
patent: 4114455 (1978-09-01), Walker
patent: 4123943 (1978-11-01), Roddy et al.
patent: 4197676 (1980-04-01), Sauerland
patent: 4199902 (1980-04-01), Sauerland
patent: 4272924 (1981-06-01), Masuko et al.
patent: 4407094 (1983-10-01), Bennett et al.
patent: 5136817 (1992-08-01), Tabata et al.
patent: 5761781 (1998-06-01), Teragaki

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