Apparatus of and method for counting a number of revolutions of a servo motor
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United States of America Patent
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Jun 21, 1994
Grant Date -
N/A
app pub date -
Nov 16, 1992
filing date -
Nov 18, 1991
priority date (Note) -
Expired
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Abstract
A revolution counting circuit for performing such an operation includes a pulse multiplying unit for multiplying signal pulses generated by an encoder and a pulse dividing unit for dividing the multiplied signal pulses by a divided value set up by a microprocessor. Further, a revolution counting circuit may include a pulse selection unit for selecting one of the signal pulses generated by the pulse multiplying unit and the pulse dividing unit. Also included are a waveform shaping unit for generating a pair of divided signal pulses having the same phase difference as the signal pulses generated by the encoder and a control signal generator for sending control signals to the waveform shaping unit.
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