| 摘要 |
<p>A method of non-contact copy control, capable of effectively copying with a discontinuous shape such as a difference in level in a model form, wherein, when an undetectable signal is input from a non-contact type distance sensor (5a) due to the deviation of a light-receiving position (s) on a model (6) from the detectable range of the non-contact type distance sensor (5a) during the copy control, the copy control is interrupted, whereby a tracer head (4) fixing the distance sensor (5a) is rotated on the axis thereof until the above-described undetectable signal is inactivated so as to allow the distance sensor (5a) to detect a distance again (S3, S4). Further, the distance sensor (5a) is rotated through a predetermined angle from its position, so that the distance detecting function of the distance sensor can be stabilized. Then, after a working table is moved with respect to the tracer head (4), a clearance between the tracer head (4) and a wall surface of a difference in level (7) is allowed to approach a specified value (L) before the copy control is restarted (S7-S10), so that the continuation of copy work along the discontinuous shape portion of the model surface is made possible. <IMAGE></p> |
