Abnormal state detecting apparatus of a machine tool
US5142210A · kind A · utility
20Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jan 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/4062
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An abnormal state detecting apparatus of a machine tool having a servomotor. The apparatus is provided with a device for detecting an abnormal acceleration and an abnormal torque of the servomotor and a device for detecting an abnormal operation state of the servomotor from the directions of the detected acceleration and torque. When the torque, acceleration and operation state are all abnormal, the machine tool is judged to be in an abnormal state and the servomotor is controlled, thereby protecting the machine tool from an impact in an abnormal operation state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.