| 摘要 |
<p>A bidirectional ribbon drive in which a pair of stepper motors (20, 21) have their windings (30-33, 50-53) cross-coupled so that a drag current flows through one stepper motor to apply drag torque to the ribbon when the other stepper motor is operated for driving. Cross-coupling connections include diodes (66-69, 73-76) and resistors (71, 72, 78, 79) which determine current and thus drag. Applicable for, e.g., an ink ribbon in a printer.</p> |
