| 摘要 |
<p>A profile control apparatus which prevents overcutting by a cutter at a corner portion by moving a tracer head ahead of the cutter. A first delay speed instruction Vxm or Vzm is determined by a first delay circuit (14a or 14c) having a time constant and a second delay speed instruction is determined by a second delay circuit (14b or 14d) having a time constant different from that of the first delay circuit for each speed instruction Vx, Vz for each axis determined on the basis of the displacement quantity epsilon x, epsilon y, epsilon z in the direction of each axis detected by the tracer head, and the difference Vxs or Vzs between the first and second delay speed instructions is calculated. An X-axis main motor and a Z-axis main motor are driven by the first delay speed instructions to operate the machine as a whole, and an X-axis sub-motor and a Z-axis sub-motor are driven by the differences in parallel with the movement described above so as to move only the tracer head and thereby to move the tracer head ahead of the cutter. <IMAGE></p> |
