Spindle orientation control apparatus
US4347470A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1981 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | Feb 20, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/49273
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A spindle orientation control apparatus having a motor for driving a spindle, speed control means for rotating the spindle at a speed in accordance with a command speed, and position control means for stopping the spindle at a commanded stopping position. The apparatus is further provided with stopping position command means for digitally instructing the spindle stopping position, a position sensor, error monitoring means for monitoring an error between the commanded stopping position and the actual rotational position of the spindle and for generating a signal when the error attains a predetermined value, and means for generating a signal indicative of an orientation speed. When the apparatus is in a spindle orientation control mode, the spindle is speed-controlled so as to rotate at the orientation speed until the error monitoring means generates said signal, and is position-controlled after the generation of the signal so as to reduce the error to zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.