| 摘要 |
PURPOSE:To provide easy setting of command value for a grinder finishing device for casting burrs etc. by sensing the repulsive force and the grinding width with a grinder and by performing the grinding while switching is made between the width control and repulsive force control. CONSTITUTION:The grinding width is determined on the basis of pulse signals given by a pulse generator 7 in compliance with rotation of a grinder 8 and signals from a continuity sensor circuit 12 to sense continuity of a work 9 with the grinder 8, to allow a control circuit 20 to carry out width control through manipulation of a wrist 6 so as to be approx. identical to the specified target width. The repulsive force to the grinder 8 is sensed by a load cell 11 during said width control, and when the nominal value for repulsive force is attained, a repulsive force sensor control circuit 21 signals to make switching from width control to repulsive force control, and when the nominal width value is attained during repulsive force control, switching in the opposite direction takes place. Thus grinding is carried out while the control modes are changed over between the two. According to this arrangement, the command width can be set easily to ensure that grinding is operated without overgrinding nor any part remaining unground.
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