| 摘要 |
PROBLEM TO BE SOLVED: To provide a cloth cutting device which can easily obtain an appropriate pressing force without losing the cycle time. SOLUTION: The cloth cutting device of a buttonholing machine includes a knife 32, a knife receiver 31, a moving mechanism 35 which moves the knife or the knife receiver, a pulse motor 34 which serves as a drive source of the movement of the knife or the knife receiver, a rotation amount detector 55 which detects a rotation amount of the pulse motor, and a controller 50 which controls the pulse motor. The controller executes a control to switch the movement of the knife or the knife receiver to be low speed on its way, and includes a cutting control means 50c which controls the pulse motor to stop driving if a deviation determining means determines that the deviation of the pulse motor reaches the set value, and a current control means 50c which limits, during the low-speed movement, a current value applied to the pulse motor to be lower than that during a high-speed movement. COPYRIGHT: (C)2010,JPO&INPIT |
