Numerical control apparatus for controlling a feed shaft and mai

Details Numerical control apparatus for controlling a feed shaft and mai Numerical control apparatus for controlling a feed shaft and mai

1989-07-26

1991-01-08

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318573, 318 39, 36447415, 36447411, G05B 1925

Patent

active

049838997

ABSTRACT:
A numerical control apparatus is provided for controlling a position of a feed shaft in relation to a rotational angle of a main shaft of a machine tool. A value denoting the actual position of the feed shaft is subtracted from a positional command value to obtain a positional deviation value. The positional command value is one of a plurality of prestored values corresponding to a given rotational position of the main shaft. The positional deviation values for a single rotation of the main shaft are stored in a data table and displayed on a display device. Another data table having a plurality of correction values stored therein is provided. Each of the plurality of correction values stored in the correction value data table corresponds to a given rotational position of the main shaft. For each rotational position of the main shaft, the positional deviation value and a corresponding correction value are added together to obtain a corrected deviation value. The corrected deviation value is used to control the position of the feed shaft. If the displayed positional deviation values are seen as being excessive, the user is able to change the correction values, and by trial and error, obtain a more favorable position of the feed shaft.

REFERENCES:
patent: 4079235 (1978-03-01), Froyd et al.
patent: 4353018 (1982-10-01), Kohzai et al.
patent: 4879660 (1989-11-01), Asokura et al.

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