Positioning device with dual linear motor
US4812725A · kind A · utility
61Cited by
10References
1Claims
0Family size
Inventor
Key dates
| Filing date | Oct 16, 1987 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Oct 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/50228
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A linear motor system includes first and second linear motors driving a load along spaced-apart supports. A positioning table, or a portion of a machine tool, supported between the first and second linear motors includes a device for varying the position of the table or portion along an axis extending between the first and second linear motors. A single motor control system produces a motor drive signal. A proportioning device proportions the portion of the motor drive signal fed to the two motors in a proportion controlled by the position of the table or portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.