Method and apparatus for controlling increment type position con

Details Method and apparatus for controlling increment type position con Method and apparatus for controlling increment type position con

1978-06-26

1980-11-11

Reynolds, B. A.

Electric heating

Metal heating

By arc

318572, 318603, B23K 912, G05B 1900

Patent

active

042334918

ABSTRACT:
An increment type position control apparatus is adapted to evaluate a numerical value concerning a positional point by making subtraction between the data in a position feedback counter for counting a feedback pulse from an incremental encoder and the data in a commanded position buffer from a processor. Upon depression of an origin return command button provided on a control panel, the position feedback counter and the commanded position buffer are each loaded with a predetermined value, whereupon a pitch is given, whereby an object being controlled is controllably moved in the direction toward the origin. If and when the object being controlled exceeds the origin position, the same is stopped and the counter and the buffer are each again loaded with an appropriate numerical value, whereupon a given pitch is provided, whereby the object being controlled is moved in the direction toward the origin and comes to a point to almost exceeding the origin position. Just at the timing when the object being controlled is about to pass the origin position, the position feedback counter is set, whereby the data concerning the origin is regained in the apparatus.

REFERENCES:
patent: 3517286 (1970-06-01), Stobbe
patent: 3641849 (1972-02-01), Kinney
patent: 3795853 (1974-03-01), Whitehouse
patent: 3802622 (1974-04-01), Nishimura et al.
patent: 3842331 (1974-10-01), Hendrickson et al.
patent: 4014495 (1977-03-01), Oda et al.
patent: 4031442 (1977-06-01), Poppelreiter

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