Sewing mahine drive apparatus and method

Details Sewing mahine drive apparatus and method Sewing mahine drive apparatus and method

1993-10-26

1995-12-05

Nerbun, Peter

Sewing

Elements

Driving mechanisms

D05B 6912

Patent

active

054719402

ABSTRACT:
A sewing machine apparatus driven by a motor, which is subject to velocity control on the basis of a detector for determining the rotary position and/or velocity of the motor output shaft. A controller is operative to control the speed of the motor in accordance with a velocity command value. A means for generating a holding force during a stop of the sewing machine ensures that the sewing needle does not provide unwanted movement. The holding force is changed when movement from the stop position is desired, as by changing the force in relation to the speed or amount of movement. This feature is particularly useful to reduce the load presented to an operator who wishes to manually change the machine position.

REFERENCES:
patent: 4691653 (1987-09-01), Neki et al.
patent: 4754721 (1988-07-01), Skogward

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