Control system for stopping spindle at predetermined rotational position
US4359676A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1980 |
| Grant date | Nov 16, 1982 |
| Priority date | — |
| Expiry date | Dec 12, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T82/2561
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A control system for stopping a spindle at a predetermined rotational position, for driving a spindle in such a manner that a positional deviation between the present rotational position of a specified point on the spindle and a predetermined rotational position at which the specified point is to be stopped, is reduced to zero, thereby to stop the specified point on the spindle at the predetermined rotational position. First and second rotational position sensors are attached to the spindle at first and second specified points thereof, the position at which at least the first rotational position sensor is attached being adjustable. Further provided are changeover means and an orientation control circuit. The first position sensor produces a rotational position deviation signal when a tool is inserted into and withdrawn from a workpiece at the time of a boring operation, and the second position sensor produces a rotational position deviation signal when tools are changed. These deviation signals are applied to the orientation control circuit selectively by the changeover means. As a result, the orientation control circuit controls the rotation of the spindle so as to reduce to zero …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.