Method and apparatus for numerical control of machine tools

US4695960A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Jurgen-Andreas Reimann · Erlangen, DE
• Herbert Basilowski · Spardorf, DE

Key dates

• Filing date: Oct 24, 1985
• Grant date: Sep 22, 1987
• Expiry date: Oct 24, 2005

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B19/186
• WIPO field: Control
• WIPO sector: Instruments

Abstract

In a hobbing machine for producing a gear from a workpiece, a device for controlling the rate of rotation of the workpiece in accordance with the motion of a cutting tool compensates for a lag in a feedback loop servo control and concomitantly in the rotation of the workpiece. The device calculates a correction quantity from the actual velocity of the tool and the loop gain of the feedback loop servo control and feeds the correction quantity thereto.