Encoder eccentricity correction for motion control systems
US7633256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2005 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Jun 17, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/37515
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Correction of rotary encoder eccentricity in an image forming device having a motor controller using period and position pulse train feedback signals. A motor includes an encoder disc rotating with the motor and at least two encoder sensors disposed at different circumferential positions about the encoder disc. A controller may use a high speed clock to calculate a corrected speed count based on speed counts determined from the number of clock cycles that elapse per cycle of pulse trains from the encoders. The controller may also calculate a corrected position count based at least partly on one or more position counts determined from the number of clock cycles that elapse between periodic sampling points and transitions of encoder pulse trains. The corrected position count may also be calculated based on a position count and one or more speed counts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.