| 摘要 |
PURPOSE:To reduce the cost of the device and to compact it by providing a common amplifier for speed control on a motor driving a turret and die respectively and arranging a changeover circuit for the turret and die inside the amplifier as well. CONSTITUTION:The motor 37 for driving a turret synchronously driving upper and lower turrets 9, 11 via shafts 31, 23 is provided and the motor 65 for driving a die is arranged as well. Inside a control device the common amplifier 77 for speed control having the changeover circuit 73 for driving the turret and die is provided. In the case of working the motor 37 for driving the turret, the changing part 73A of the changeover circuit 73 is used by the changing signal of a command part 75 and in the case of working the motor 65 for driv ing the die, the changeover circuit 73 is used by changing it. Due to the ampli fier 77 for speed control being made common, the cost of the driving device is reduced and the whole device is made compact as well.
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