Method of controlling stopping operation of a sewing machine and

Details Method of controlling stopping operation of a sewing machine and Method of controlling stopping operation of a sewing machine and

1992-03-19

1994-08-02

Nerbun, Peter

Sewing

Elements

Starting or stopping

1122621, 318369, D05B 6926

Patent

active

053335643

ABSTRACT:
A sewing machine stopping control system brings a sewing machine from a high-speed operation to a stop without varying modes and with high stopping accuracy, for allowing the sewing machine to operate highly efficiently. According to the stopping control system, a motor is decelerated in response to a release of a foot pedal. At a time when a predetermined rotational speed or lower is detected, the deceleration operation is disabled regardless of a decelerating command BKON outputted from a speed command comparing circuit. Thereafter, when a predetermined needle position is detected, the deceleration operation is resumed. When a predetermined low speed is detected during the deceleration, the deceleration operation is again disabled. Thereafter, when a predetermined needle position is detected, the deceleration operation is again resumed so that the motor is completely stopped.

REFERENCES:
patent: 3804043 (1974-04-01), Benson et al.
patent: 4080914 (1978-03-01), Ishida et al.
patent: 4765267 (1988-08-01), Nakamura
patent: 5156106 (1992-10-01), Suzuki et al.

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