| 摘要 |
PURPOSE:To confirm reset of machining table to original point on the basis of the output from state holding means by constructing such that upon provision of detection signal from original point detection sensor the state holding means will keep storage until a drive pulse is produced. CONSTITUTION:A drive signal CW from a pulse generator 2 drives a drive motor 4 to move a machining table WT in the arrow direction A while enters through OR gate 8 into a detector 9 further being fed to the reset terminal R of a flipflop circuit 10. Upon function of an original point detector 5 through a machining table WT, it is input to the set terminal S of flipflop circuit 10. Consequently, set output is fed through a lamp driver 11 to original point detection lamp 12 to light it further being fed to a motion command generator 1 to inform reset of the machining table WT to the original point. Since the circuit 10 is reset only when a drive signal is fed, the lamp 12 will keep lighting even when the tabel WT has passed slightly over the original point. |
