Bidirectional Drive Transmission
Original Publication Date: 1981-Oct-01
Included in the Prior Art Database: 2005-Feb-12
The bidirectional friction drive transmission described below and illustrated schematically in the drawings eliminates the need for a timing belt to transmit motion from a motor to an output shaft, for example, a leadscrew for a typewriter or printer. Conventionally, the belt used in such drive arrangements lies within the velocity-servo-control loop, the belt tension effecting steady-state velocity fluctuations of the body when the speed is controlled. With increasing belt tension, velocity fluctuation decreases but machine noise and bearing loads on belts and pulleys, etc., increase.