Numerical control apparatus

Details Numerical control apparatus Numerical control apparatus

2006-05-02

2006-05-02

Picard, Leo (Department: 2125)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Product assembly or manufacturing

C700S186000

Reexamination Certificate

active

07039493

ABSTRACT:
In a numerical control apparatus, a speed difference ΔS between a program command value Sc of spindle speed and a spindle rotational speed Sov to which a spindle rotational override is applied is determined. From the speed difference ΔS and a pitch command value P and a response sensitivity K of a servo system during thread cutting, a follow-up error variation ΔZ of a feed axis caused by the speed difference ΔS is calculated. The follow-up error variation ΔZ is converted into a delay time Td of a movement start of the feed axis based on the thread pitch command value P during the thread cutting. And the movement start of the feed axis is carried out behind the converted delay time Td.

REFERENCES:
patent: 4079235 (1978-03-01), Froyd et al.
patent: 4879660 (1989-11-01), Asakura et al.
patent: 5404308 (1995-04-01), Kajiyama
patent: 6847857 (2005-01-01), Sugie
patent: 2000-176789 (2000-06-01), None

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