Operation
The ComTrac Drive is an adjustable speed traction drive.
Its operation is based upon the transfer of power between
the motor-mounted Drive Cone and the Traction Ring. The
Drive Cone and Traction Ring are forced together to transmit
torque through the use of a Spring loaded Torque Compensator
assembly.
At rest, the spring inside the Torque Compensator
produces only a contact pressure between the Drive
Cone and the Traction Ring. Unlike other mechanical drives,
the minimal spring pressure allows speed changes to be
made while
the drive is at rest.
As the drive is started, the Load
Compensating Cams move against each other to increase
pressure between the Drive Cone and Traction Ring. During
operation, the Load Compensating Cams maintain the proper
amount of pressure between the
Drive Cone and Traction Ring in proportion to the output
load torque required.
Speed changes are made by changing
the relative running diameters of the Drive Cone and
Traction Ring. As the motor and Drive Cone are moved upward,
the contact point between the Cone and Ring moves to the
faster running outer diameter
of the Drive Cone and the output speed increases. As
the motor and Drive Cone are lowered, the contact point
between the Cone and Ring moves to the slower running center
of the Drive Cone and output speed decreases.
Movement of
the motor and Drive Cone are accomplished through the
use of a Handwheel attached to a Rack and Pinion. By turning
the handwheel the motor is easily raised or lowered on
dustproof guides. Speed changes can also be
made through the use of an optional electric remote control which replaces the handwheel.
Speed Control Made Simple
Turn the handwheel - pinion moves the rack on the motor slide - up or down.
