Method and device for determining whether or not origin return o

Details Method and device for determining whether or not origin return o Method and device for determining whether or not origin return o

1990-06-27

1991-12-24

MacDonald, Allen R.

G05B 1500

Patent

active

050758705

ABSTRACT:
A method and device determines whether or not an origin return operation is required for an industrial robot, such as an arc welding robot, upon resupplying of power after power cut-off during operation of the robot. The method and device enlarge an applicable range of an origin return elimination technique and also improve the reliability of a rotational angle detecting device. After power cut-off during the operation of the industrial robot, a plurality of position data of the same movable portion of the robot are retrieved, and a determination is made as to whether or not the origin return operation is required upon resupplying of power according to a difference between each position data.

REFERENCES:
patent: 4575666 (1986-03-01), Nakashima et al.
patent: 4757458 (1988-07-01), Takemoto et al.
patent: 4980839 (1990-12-01), Souji et al.

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