| 摘要 |
PURPOSE:To improve economically accuracy in working surface by carrying out straight line interpolating calculation on the basis of high frequency clock pulses with a straight line interpolating circuit using pulses from a pulse encoder as trigger. CONSTITUTION:Assuming that the number of pulses supplied from the output of a pulse encoder per one revolution of a spindle is 1024 for example, proper data are set to a straight line interpolating circuit 22 and a terminal detecting circuit 23. When given a threading starting signal, a flip-flop 17 for controlling the threading is set through AND gate 16 and a flip-flop 19 for controlling interpolating calculation is set by pulses sent from the pulse encoder through AND gate 18. During such set condition, straight line interpolating calculation is carried out on the basis of clock pulses from AND gate 21 in the straight line interpolating circuit 22, and these flip-flops are reset by pulses corresponding to 1024 from the circuit 22. |
