NC device controlling machining processes with pre- and post-exe

Details NC device controlling machining processes with pre- and post-exe NC device controlling machining processes with pre- and post-exe

1994-11-17

1996-11-26

Martin, David S.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318567, 36447428, H02D 500

Patent

active

055789137

ABSTRACT:
A numerical control device can perform machining processes in a short time while maintaining high precision, regardless of the order at which programs are commanded. Consecutive blocks of a numerical control program are retrieved on a block-by-block basis, and a pre-execution in-position value and a post-execution in-position value for each of the blocks of the numerical control program are set and stored in a ROM. The block of the numerical control program is executed in accordance with at least one of the corresponding pre-execution in-position value and the post-execution in-position value. In one embodiment, if the post-execution in-position value of a formerly retrieved block is large and the pre-execution in-position value of the subsequently retrieved block is small by retrieving two consecutive blocks, the post-execution in-position value of the formerly retrieved block is rewritten to a small value, and the block of the program is executed in accordance with the rewritten post-execution in-position value.

REFERENCES:
patent: 4475160 (1984-10-01), Inaba
patent: 4785221 (1988-11-01), Neka
patent: 4902950 (1990-02-01), Kawamura et al.
patent: 4949025 (1990-08-01), Iwagaya et al.
patent: 4956785 (1990-09-01), Kawamura et al.
patent: 4965737 (1990-10-01), Iwagaya

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