Probe head with self-contained electrical switch operated means for a coordinate-measuring machine

US4815214A · kind A · utility

Assignee

• Carl Zeiss Stiftung · DE

Inventors

• Eckhard Enderle · Aalen, DE
• Karl Schepperle · Oberkochen, DE

Key dates

• Filing date: Jul 10, 1987
• Grant date: Mar 28, 1989
• Expiry date: Jul 10, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B7/002
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In the work-contacting probe head (or on the suspension of the deflectable work-contacting probe head) of a coordinate measuring machine, an electromagnet is provided to trigger a mechanical impact blow or vibration if the switch-contact circuit in the three-point mounting of the probe pin remains open for a predetermined short period of time after completion of a cycle of coordinate measurement of a given work-contacted measurement location. The delivery of the impact is sufficient to overcome any residual mechanical friction that may have interfered with return of the probe to its calibrated at-rest position, at completion of the measurement cycle.