SMALL HOLE ELECTRIC DISCHARGE MACHINE DRILL PROVIDED WITH DEPTH-SPECIFIC PROCESSING MEANS AND METHOD OF DEPTH-SPECIFIC PROCESSING WITH SMALL HOLE ELECTRIC DISCHARGE MACHINE DRILL

摘要

Disclosed is a method of depth-specific processing with a small hole electr ic discharge machine drill. Firstly, a specified processing depth A and toleran ce .alpha. are registered with a program. Secondary, an origin of initiation of drilling is set on a surface of a workpiece by contacting a tip of an electrode D with the surfac e of the workpiece at a check point. Thirdly, the electrode is moved to a processing position to process until the specified processing depth. Fourthly, the electrode is mov ed to a position above the check point. Fifthly, the electrode is moved downward unt il the electrode contacts the surface of the workpiece; a Z-axis coordinate upon contact is defined as C. And finaly, a condition judgment is made concerning C which is found in the fifth step, as to whether or not ¦C¦ .ltoreq. .alpha. is satisfied. I f the condition is satisfied, then processing is completed.