Electronic depth controller for EDM apparatus
US4510365A · kind A · utility
15Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1982 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | May 6, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/18
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
EDM apparatus has a servo drive under the control of a main control system for advancing a machining electrode toward a conductive workpiece. When the electrode arrives at a surface of the workpiece to commence EDM machining, the main control system causes a sudden deceleration of the servo. The depth controller detects this sudden deceleration by means of a sensor and sets a zero reference plane from which machining depth is measured. The depth controller can also detect electrode breakthrough by detecting servo acceleration occurring when the electrode breaks through a surface of the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.