| 摘要 |
<p>A non-contact profile control method capable of preventing a cable of a non-contact sensor from winding round a tracer head when the contour profiling of a three-dimensional model shape is done in a non-contacting manner. Two distance detectors (5a, 5b) are provided on a tracer head (4), and a normal vector of a model surface (6) is determined on the basis of a measurement value obtained by sampling the profile data from the tracer head (4). A contour profile control operation is carried out by turning the distance detectors (5a, 5b) to control the directions thereof to be in agreement with that in which a perpendicular plane including this normal vector extends. When the tracer head (4) has made a round of the model (6), a reverse turning control is performed in the direction opposite to that in which the tracer head (4) has turned. This can prevent the cables (7a, 7b) from winding round the tracer head (4), and enables a contour profiling operation to be carried out continuously.</p> |
