Document Type and Number:
Japanese Patent JPH035943
Kind Code:
B2
Abstract:
PCT No. PCT/JP84/00072 Sec. 371 Date Nov. 5, 1984 Sec. 102(e) Date Nov. 5, 1984 PCT Filed Feb. 28, 1984 PCT Pub. No. WO84/03466 PCT Pub. Date Sep. 13, 1984.The present invention is intended to prevent a cutter from biting into a workpiece at a point of a sudden change in the configuration of a model in tracer control equipment. Sampling circuits (12, 12X to 12Z) respectively sample a composite displacement signal and displacement signals in the X-axis to Z-axis directions at equal time intervals. An arithmetic circuit (17) obtains the angle between the displacement vector of a stylus (1) at the current sampling and the displacement vector of the stylus (1) at the previous sampling from the sample values by the sampling circuits (12, 12X to 12Z). A comparator (18) compares the result of calculation by the arithmetic circuit (17) and a reference level and, according to the result of comparison, controls whether to decrease the feed rate. Accordingly, the cutter can be prevented from biting into the workpiece at the sudden-change point in the configuration of a model.
Inventors:
MATSURA HITOSHI
Application Number:
JP3558983A
Publication Date:
January 28, 1991
Filing Date:
March 04, 1983
Export Citation:
Assignee:
FANUC LTD
International Classes:
B23Q33/00; B23Q35/04; B23Q35/123
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