| 摘要 |
In a stamping apparatus, a subtracter 22b and an adder 23b compare an output value of an amplifier 29 which is a signal proportional to ÄTÜ expressing the torque generated at a fulcrum 101 by the reaction force ÄFÜ from the material to be stamped 6, to a pulse . duty setting value stored in a pulse . duty setting section 21b, and a signal in which the difference is added to the pulse . duty setting value, is generated, and a switch 25 inputs the signal into a comparator 24b in order to make the signal the comparison signal to the chopping wave outputted from a chopping wave generation circuit 26' in the PWM pulse generation circuit 26. <IMAGE> |
