Device for detecting rotational position deviation
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United States of America Patent
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Oct 15, 2002
Grant Date -
N/A
app pub date -
Aug 1, 2000
filing date -
Sep 24, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a detecting device of rotational position deviation, which detects deviation of the rotational position of machine axes driven by electric motors with pulse signals outputted from pulse generators, which are attached to at least two electric motors. One or more deceleration mechanisms are provided between an electric motor and a machine axis connected to the electric motor. A pulse transducer transforms two pulse trains outputted from the pulse generators to one pulse train, and an integrating counter counts the pulse train which is outputted from the pulse transducer, thus corresponding to the rotation angle. A zero phase pulse is outputted by each rotation of the pulse generator. The invention further comprises a count transducer transforming the count output from the integrating counter, and a calculator of rotational position counter calculating the output of the integrating counter and the count transducer and outputting rotational position errors.
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