Final servo control in NC systems
US4041287A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1976 |
| Grant date | Aug 9, 1977 |
| Priority date | — |
| Expiry date | Sep 8, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/43048
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An improved final servo control for numerical control systems of the type which perform linear and/or circular interpolation by iterative updating of commanded position signals. The improvements are embodied in means to sense when the servo loop has had an offset error introduced by drift or aging of the final amplifier or similar components, together with means for progressively and automatically removing such error; and by means to avoid attempts at extreme acceleration or deceleration beyond the ability of the servo power element (motor) to accomplish, --by creating from an iteratively updated primary position command signal, whose rate of change may suddenly alter by a wide margin, a secondary position command signal which varies ultimately by the same amount but at a lesser rate of change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.