| 摘要 |
PCT No. PCT/JP88/00218 Sec. 371 Date Oct. 28, 1988 Sec. 102(e) Date Oct. 28, 1988 PCT Filed Feb. 29, 1988 PCT Pub. No. WO88/96506 PCT Pub. Date Sep. 7, 1988.The invention relates to a pick-feed method in rotating body tracing for performing tracer control by rotating a model (MDL), advancing or retracting a stylus (ST) in contact with the model, in dependence upon the shape of the model, in a direction of the center of rotation (OM), and pick-feeding the stylus in a plane parallel to a rotational axis of the model every revolution of the model. This pick-feed method includes forming first and second areas (AI, AII) by dividing the full circumference of the model in half by a straight line (LL') connecting a point (PL) having a predetermined rotational angle ( theta L) and the center of rotation (OM) of the model, determining in which area the stylus (ST) is present when the stylus is rotated relative to the the model (MDL) by rotating body tracer control, refraining from executing a pick-feed when the stylus enters the second area (AII) from the first area (AI), and executing a pick-feed when the stylus enters the first area from the second area.
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