Brake control method of gravity axis
US5144213A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1990 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Jul 30, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/50178
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A gravity axis brake control method of controlling the brake of the gravity axis of a computerized numerical controlled machine tool, wherein a computerized numerical control (CNC) notifies a programmable controller (PC) that the control of the gravity axis will be interrupted (Step S1), the PC outputs a signal for actuating the brake at the machine tool (step S3), and the CNC turns off an exciting current of a servo motor after a preset brake operation completion time has passed (step S7). The preset time is longer than the time after that at which the CNC notifies the PC to interrupt the control of the servo motor as compared to the time at which the brake locks the gravity axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.