Bi-directional drive print wire actuator with forward-velocity and reverse-position closed loop feedback control
US4523867A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Jul 25, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J9/52
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention provides a bi-directional drive printer actuator with position feedback control and methods of operation to optimize the performance of impact type printers. By monitoring the position of the print wire, a forward input power pulse can be varied as to magnitude and duration to maintain a desired predetermined velocity of the print wire up until the time of impact. Further, by monitoring position feedback signals generated as the print wire returns to an at-rest position, a reverse input power pulse and forward input power pulse can be modulated for magnitude and duration to maintain a desired rearward velocity of the print wire, and bring the print wire to an at-rest position with a minimum of rebound off a back stop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.