Quinton MedTrack CR60, Руководство по обслуживанию

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2-4 Theory of Operation MedTrack CR60 Rehabilitation Treadmill Service Manual
The treadmill drive board also uses AC power to generate a half wave
rectified signal used to drive the DC grade motor. Two solid state relays
drive the grade motor: one in the direction of increasing grade, the other
in the direction of decreasing grade.
Drive Motor Assembly
The drive motor, which is driven by the drive board, delivers torque and
speed to the front roller of the treadmill through a poly-V drive belt and a
set of speed reduction pulleys. A flywheel, integral to the motor poly-V
pulley, is used to average the pulsing runner loads.
Grade Motor Assembly and System
The grade motor drives the grade pinion shaft using a chain and a set of
speed reduction sprockets. The grade pinion shaft in turn drives a set of
rack gears, which raise and lower the front of the treadmill.
A grade potentiometer senses the rack gear movement for the grade
system feedback. Limit switches limit the travel of the rack gears in the
event of a potentiometer failure or incorrect calibration.
Deck and Roller Assembly
The deck and roller assembly provides the running surface for the user.
This surface consists of a movable and flexible walk belt supported by a
semi-rigid platform. This platform is supported by a steel-welded frame.
A poly-V drive belt, coupled through a pulley to the drive motor, drives
the front roller. The front roller uses friction to drive the walk belt. A rear
roller, acting as an idler pulley, tensions the walk belt. Both rollers are
mounted to the steel support structure.