Mechanical Variable Speed – Characteristics
“TD” Series
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.
Minimum speed – motor slide down.
Maximum speed – motor slide up.
Horsepower Ratings: 0.5 to 10
Output Speeds: 2180 to 311 RPM. Combine with MGS "C", "F", or "K" to get down to .6 RPM>
Speed Range: 5:1 or 7:1
Output Torques: Up to 496 in.lb.
NEMA C-Face Inputs: 56C through 215TC
NEMA C-Face Outputs on 0F: 56C through 182/184TC
