Numerical control system having a position processing unit opera

Details Numerical control system having a position processing unit opera Numerical control system having a position processing unit opera

1977-02-07

1978-08-15

Yusko, Donald J.

Communications: electrical

Digital comparator systems

318569, 318601, G05B 1302, G05B 1918

Patent

active

041076540

ABSTRACT:
A numerical control system includes a machine tool position processing unit operated upon a power failure. The machine tool position processing unit is adapted to normally generate a present position output for each sampling time in response to an output corresponding to the absolute position of the machine tool as detected at a resolver, adapted to store and hold the absolute position data when a power supply is interrupted, and adapted to generate, when a power supply is resumed, an output corresponding to a corrected present position of the machine tool as obtained by correcting an overtravel effected by the machine tool at the power interruption time.

REFERENCES:
patent: 3917930 (1974-11-01), Davey et al.

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