Patent
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.
Kojyo Kazunobu
Nagahama Yasuhide
Nagata Manabu
Takayama Toshinao
Kabushiki Kaisha Kobe Seiko Sho
MacDonald Allen R.
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