Tape drive motor control circuit
AssigneeGeneral Electric Company
InventorDonald E. Miller
Life of this patent
Estimating the term…
Abstract
An arrangement for controlling the speed of payoff and winding reels and an associated capstan drive in a recording and reproducing arrangement during start up, running and stopping operations employing the application of control signals to the capstan and reel motors which include novel, combined use of capstan motor armature counter-electromotive force, reference signals and capstan motor terminal voltage.
Claims21
A tape drive comprising a source of a constant first reference voltage of predetermined amplitude, a winding reel, a direct current winding reel motor for driving said winding reel, a winding motor armature current regulator, a direct current capstan motor, a capstan motor armature counter electromotive force regulator, said capstan regulator responsive to said reference voltage for driving said capstan motor at a substantially constant speed and in a first direction, and said winding motor regulator responsive to the terminal voltage of said capstan motor for controlling the winding torque exerted by said winding reel motor on said winding reel.
A tape driving comprising a direct current winding reel motor, a direct current tape capstan motor, first circuit means for driving said capstan motor at a substantially constant speed and in a first direction in response to an input reference signal of predetermined amplitude, and second circuit means for controlling the winding torque exerted by said winding reel motor as a function of the polarity and magnitude of the terminal voltage of said capstan motor.
A tape drive for winding tape from a payoff reel onto a winding reel comprising a source of a first reference signal, a direct current winding reel motor, a winding motor armature current regulator, a direct current capstan motor, a capstan motor armature counter-electromotive force regulator, said capstan regulator responsive to said reference signal and the counter-electromotive force developed by said capstan motor for driving said capstan motor at a substantially constant speed, and said winding motor regulator responsive to the terminal voltage of said capstan motor for controlling the winding torque developed by said winding reel motor.
Dependencies are inferred from the claim text.