Method for track control

US7016763B2 · kind B2 · utility

Assignee

• DR. JOHANNES HEIDENHAIN GMBH · DE

Inventors

• Matthias Fauser · Siegsdorf, DE
• Steve Kallenborn · Wokingham, GB

Key dates

• Filing date: Aug 31, 2002
• Grant date: Mar 21, 2006
• Expiry date: Nov 21, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P90/02
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method for continuous-path control includes predefining at least two global tolerances to a numerical control and predefining, to the numerical control, a tool path including support points, a non-continuously differentiable corner of the tool path being situated at each support point. The method also includes assigning, by a tolerance-assignment unit, one of the at least two global tolerances determined to the corner at each support point. A global edge tolerance may be predefined when the tolerance-assignment unit recognizes that the corner at the support point leads to an edge in a workpiece. A global curve tolerance may be predefined when the tolerance-assignment unit recognizes that the corner at the support point approximates a curvilinear, continuously differentiable curve. A global edge tolerance may be predefined to be smaller than a global curve tolerance. A numerical control includes an arrangement for specifying at least two global tolerances and an arrangement for specifying a tool path having support points at which non-continuously differentiable corners of the tool path are situated. The numerical control also includes a tolerance-assignment unit adapted to assign…