Electric sewing machine driving apparatus

Details Electric sewing machine driving apparatus Electric sewing machine driving apparatus

D - Textiles, Paper

05

B

341/100

D05B 69/28 (2006.01) D05B 69/22 (2006.01) D05B 69/26 (2006.01)

Patent

CA 1179419

ABSTRACT OF THE DISCLOSURE An electric sewing machine driving apparatus includes a clutch coil of an electromagnetic clutch for transmitting a driving motor torque to a sewing machine, a brake coil of an electromagnetic brake for braking the sewing machine, a needle position signal generator for generating a signal indicative of a position where a needle of the sewing machine is to stop, a DC power supply for energizing the clutch coil and the brake coil, voltage generating means for generating a DC voltage higher than the supply voltage of the DC power supply and a capacitor disposed to be charged by the voltage generated by the voltage generating means, whereby an electric charge stored in the capacitor discharges through the brake coil in response to the needle position signal from the needle position signal generator, thereby improving the needle positioning accuracy of the sewing machine.

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