| 摘要 |
PURPOSE:To ensure the simple and continuous machining of a cubic work by having relative vertical and horizontal shifts of a cutting tool concurrently with the revolution of the cubic work to be machined. CONSTITUTION:A work 14 to be machined is put on a rotary table 10, and the table 10 is turned centering on its center axis C. At the same time, a cutting tool 16 is shifted toward a prescribed axis X and against the work 14 having a displacement with revolutions. Therefore an arithmetic processing part of a numerical controller calculates minute shift amounts DELTAl and DELTAz for each sampling period to each direction in accordance with a prescribed shift speed command F', a minute speed F in the cutting direction L of the object 14 and the minute speed FZ toward the center axis Z of the tool 16. Furthermore a rotary shaft command DELTAthetan and a linear shaft command DELTAXn which are distributed every sampling period are calculated by a digital differential analysis and from the shift amounts totalized every sampling period. Then the control value is decided for a servomechanism. |
