| 摘要 |
PURPOSE:To uniformly and accurately control the machining size of a work, by a method wherein a cut completing point is accurately controlled according to a grinding condition. CONSTITUTION:A motor 10 for driving a cut table 3 is controlled by a cut feed control device 11, A marging DELTAD(j) is computed by a marging computing circuit 14 from an output difference between a gauge 12 before machining and that after machining. In which case, the marging DELTAD(j), detected on each occasion of machining being effected one time is orderly accumulated by a marging accumulating computing circuit 17 until subsequent dressing is conducted after preceding dressing, and an accumulating value IR is outputted to a cut feed control device 11. The control device 11 computes a subsequent cut completion point Sc depending upon the margin accumulating value IR with regard to a cut completion point ScO initially set. Namely, when the marging accumulating value IR is increased in a stepped manner, the cut completion point Sc is corrected in a stepped manner so as to be increased with the increase in the number of machining processes, and a machining size is ensured despite of the number of machining processes. |
