Learning control method in numerical control machine tool

Details Learning control method in numerical control machine tool Learning control method in numerical control machine tool

1989-07-26

1991-05-28

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318573, 318 39, 36447415, 3644743, G05B 1925

Patent

active

050197630

ABSTRACT:
For controlling the rotation angle of a main shaft of a numerical control machine tool in synchronization with the position of a feed shaft, the learning control method according to the present invention comprises steps of reading the positional command value of the feed shaft corresponding to the detected value of the current revolutional angle of said main shaft out of the table which stores in advance the positional instruction values corresponding to the angle equivalent to one rotation of the shaft, subtracting the detected value of the current position of the feed shaft from the read out positional value to obtain the positional deviation table of the shaft, renewing the correction value table of the positional deviation values of the shaft which are stored in advance by using afore-mentioned deviation table, and suspending the renewal operation of the correction table of the positional deviation when the difference between the positional deviation table which has been added with the correction value table before the renewal and the positional deviation table which has been added with the correction value table after the renewal becomes less than a predetermined numerical value.

REFERENCES:
patent: 4879660 (1989-11-01), Asakura et al.

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