Control system for synchronized operation of machine tool motors
US4353018A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1980 |
| Grant date | Oct 5, 1982 |
| Priority date | — |
| Expiry date | Aug 20, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/175
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An improved control system for facilitating tapping work in a machining center of the type which performs a variety of machining operations automatically. Control is effected by establishing and maintaining a certain relationship between the operation of a spindle motor which rotates a tap, and the operation of a Z-axis feed motor which transports a table longitudinally of the tap, the table mounting a workpiece. Specifically, the spindle motor and Z-axis feed motor are driven in relation to one another at all times in such a manner that the equation N.sub.s =f.sub.m /P will be satisfied, where N.sub.s (rpm) is the rotational speed of the spindle motor, f.sub.m is the feed speed of the table along the Z-axis, and P is the thread pitch of the tap. Apparatus for controlling the spindle motor includes a control circuit which is adapted to stop the spindle at a prescribed angle of rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.