| 摘要 |
PURPOSE:To reduce the working error and to perform working as desired by setting the detection signal unit from a detector, which detects the position of the mobile part of a machine, to an interpolated unit interpolated with smaller units. CONSTITUTION:A decoding part 2 reads and decodes a program from an NC type 1, and a move command commanded by the program is converted to interpolated units smaller than a minimum set unit to interpolate the command. An extent of movement per the unit time of the interpolation result is inputted as data of interpolated units to a position control part 5 of a servo circuit. The position detection signal unit from a position detector 8 which detects the position of the machine is set to the interpolated unit and is inputted to the control part 5 to control the position. Since each shaft which drives the mobile part of the machine is driven in units smaller than the minimum set unit of the program move command in this manner, the working error is -1/2-+1/2 of the interpolated unit. That is, the working errors is -1/2-+1/2 of the unit smaller than the minimum set unit.
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