Device for controlling the feed of machine tools
US4322669A · kind A · utility
9Cited by
7References
2Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 5, 1979 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | Jul 5, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23Q16/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus for controlling a DC motor driven screw feed which moves the table of a machine tool into prescribed positions including a plurality of limit switches which detect the position of the table, a rate change control circuit which receives signals from the limit switches and changes the rate of revolution of the DC motor when the table has reached prescribed rate change positions and a current limiting circuit which supplies the DC motor with a prescribed constant current and keeps the output torque of the DC motor at a prescribed level when the table has reached a prescribed dwell position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.