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DESCRIPTION
This is the motor
controller for Schwinn's 1997 treadmill line. The motor is
controlled by a PIC microcontroller that is commanded, via serial
bus, by another PIC based control board in the display panel of
the product.
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NOTEWORTHY
TECHNOLOGY
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Motor
speed feedback from cheap and simple pin wheel optical
sensor
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PID
motor control algorithm
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Reliable
IGBT high voltage PWM motor switching circuit
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Deadman
safety circuit shuts down motor if drive circuits fail
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