| 摘要 |
PCT No. PCT/JP86/00061 Sec. 371 Date Sep. 19, 1986 Sec. 102(e) Date Sep. 19, 1986 PCT Filed Feb. 12, 1986 PCT Pub. No. WO86/04852 PCT Pub. Date Aug. 28, 1986.The present invention is intended to improve the machining accuracy of tracer control which moves a tracer head and a model relative to each other along a path specified by numerical information. Profile arithmetic means (4, 5, 30 to 33) creates a velocity signal (Va) in a tracing feed direction and a velocity signal (Vz) in the Z direction on the basis of displacement signals ( epsilon x, epsilon y, epsilon z) from the tracer head (1) and direction signals (sin alpha , cos alpha ) indicating the tracing feed direction, which are supplied from direction signal generating means (36). Velocity signal generating means (18, 19) derives command pulse signals in the X and Y directions from numerical information indicating the path of travel of the tracer head (1) and the velocity signal (Va) in the tracing feed direction produced by the profile arithmetic means (4, 5, 30 to 33). X- and Y-direction drive means (10X, 10Y) drive the tracer head (1) and the model (3) relative to each other in the X and Y directions in accordance with the output signals of the command pulse signal generating means (18, 19), and Z-direction drive means (10Z) drives the tracer head (1) and the model (3) relative to each other in the Z direction in accordance with the output signal (Vz) of the profile arithmetic means (4, 5, 30 to 33). The direction signal generating means (36) derives from the output signal of the command pulse signal generating means direction signals (sin alpha , cos alpha ) indicating the tracing feed direction, and provides them to the profile arithmetic means (4, 5, 30 to 33).
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