| 摘要 |
PURPOSE:To enable the high-speed movement of a stage by a pulse motor, by applying functions of optional forms to increase and decrease the speed of the pulse motor. CONSTITUTION:When a control instruction signal 2(b) obtained synchronously with a movement instruction signal 12(e) is applied, such a pulse train signal is produced by a gate circuit 3 and a maximum and minimum value detecting circuit 5 that an updown counter 4 is operated upward as to the high level of the control instruction (b) and downward as to its low level. The output signal of the updown counter 4 serves as address information on a read-only memory 6. Function data corresponding to an address of the memory is changed into an analogue signal (c)by a D-A converter. The signal (c) is changed into a pulse train signal (d) by a V/f converter 8. A signal (f), which is generated as a result of the AND of the pulse train signal (d) with the movement instruction 12 by a gate circuit 9, is supplied to a pulse motor 11 through a driver 10. |
