Printer escapement servomotor drive with a minimum power supply

Details Printer escapement servomotor drive with a minimum power supply Printer escapement servomotor drive with a minimum power supply

B - Operations, Transporting

41

F

101/115

B41F 27/00 (2006.01) H02P 8/12 (2006.01)

Patent

CA 1208490

A PRINTER ESCAPEMENT SERVOMOTOR DRIVE WITH A MINIMUM POWER SUPPLY Abstract A servomotor drive system for a printer escape- ment is provided which minimizes power supply require- ments. The drive system has means for accelerating and decelerating the printhead escapement having a fixed current source applied to a servomotor which drives the escapement. In order to minimize power requirements, the system includes means for control- ling the current in the motor which comprise means for sensing the actual motor current and feeding back the sensed current to a comparing means. A preselected varying current profile is applied to the comparing means which compares this profile to the actual motor current. Means are then provided responsive to these comparing means for altering the actual motor current to conform with this preselected varying motor current profile.

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