| 摘要 |
PURPOSE:To shorten the original point resetting time and to improve the processing efficiency by deciding whether each mobile part is positioned at the original point side or the opposite side to the original point centering on the deceleration command position and storing the result of this decision. CONSTITUTION:A memory means 16 consists of an original point resetting cam switch 9 and a bubble memory 15 which stores an input signal after the detection signal A is supplied and the preceding signal is replaced. The means 16 decides the position where a table 10, i.e., a mobile part positioned centering on a deceleration command position P set at a mobile axis (X axis) and stores the result of decision. While the table position signal B is read out of the means 16 when the original point resetting action is started at an original point resetting control circuit 17. Then the drive signal C is delivered to a table driver 18. Thus it is decided in an original point resetting mode whether the table 10 is positioned at the original point side 01 or the opposite side O2. When the table 10 is positioned a the side O1, the shaft is sent up to the position P toward the side O2 and the original point is reset. While the original point is reset immediately when the table 10 is positioned at the side O2.
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