Servo press controller

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United States of America Patent

PATENT NO 6237479
SERIAL NO

09402015

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present invention relates to a servo press controller which can prevent the servo runaway caused by the malfunction of CPUs, the faults of a position sensor, or other troubles to thereby increase the safety of the servo press. For this purpose, first to third CPUs (21, 22, 23) each of which conducts a different control among the input of set data, the calculation of a servo position command, and the calculation of a servo speed command send and receive watch dog signals between itself and another CPU for monitoring each other's condition by checking whether the watch dog signals sent from the partner computer are normal or not, and, when there is an abnormality in any computer, stopping the servo press (1) for emergency.

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Patent Owner(s)

Patent OwnerAddress
KOMATSU LTD2-3-6 AKASAKA MINATO-KU TOKYO 1078414 JAPAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Douba, Eiji Komatsu, JP 5 11

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