Method and apparatus for positioning first and second objects ba

Details Method and apparatus for positioning first and second objects ba Method and apparatus for positioning first and second objects ba

1991-07-25

1992-12-08

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

219 6916, 324 711, 364561, B23H 702, B23H 718

Patent

active

051700263

ABSTRACT:
A contact point is estimated by detecting a variation of a potential difference between the first and the second object as the objects approach one another. The method and apparatus are particularly suited for use in an electrical discharge machine (EDM) that is controlled by a numerical control (NC) unit for machining a workpiece.

REFERENCES:
patent: 3809308 (1974-05-01), Roeder et al.
patent: 3833788 (1974-09-01), Hovance et al.
patent: 4324970 (1982-04-01), Nanasawa et al.
patent: 4825037 (1989-04-01), Spaude
patent: 4827213 (1989-05-01), Spaude

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