| 摘要 |
PURPOSE:To simplify the constitution by omitting memories. CONSTITUTION:A manual switch 1 has switches 11, 12 moving one moving part respectively front and rear, and switches 13, 14 moving another moving part up and down, and a driving circuit consisting of OR circuits 21-24 and amplifiers 25-28 gives a driving signal to a motor 4 and an electromagnetic clutch 5. The output of a detector 3 detecting the number of revolutions of a motor is input to a counter selecting circuit 101, and it is output to the clock terminal of counter 61 or 63 when the switch 11 or 12 is on, and to that of counter 62 or 64 when the switch 13 or 14 is on. The counters 61-64 make addition or subtraction through the reception of command of an addition/subtraction selecting circuit 102 and reset the count value through the reception of the output of a group selecting circuit 103. |
