| 摘要 |
In a generic-electrode NC-EDM process, the electrode tool oriented in the direction of a z-axis is translationally retracted, from a position of a defective gap condition on a prescribed two-dimensional feed path in an x-y plane, by a prescribed distance in a prescribed direction which is transverse generally to all of the x-y, y-z and z-x planes so that the electrode end portion with a generic form is removed from the machined surfaces adjacent the machining gap of the defective condition. This retraction displacement may be performed under numerical control by displacing the electrode tool translationally by a first predetermined distance in an x-y plane and orthogonally to a portion of the feed path which is immediately prior to that position and simultaneously retracting the electrode axially in the direction of the z-axis by a second predetermined distance.
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