Control system for frame shift in embroidering machine

Details Control system for frame shift in embroidering machine Control system for frame shift in embroidering machine

1990-08-24

1991-12-24

Nerbun, Peter

Sewing

Special machines

Darning

112277, D05B 2100, D05B 6936

Patent

active

050742299

ABSTRACT:
An embroidery frame attached to an embroidering machine is shifted on a horizontal plane by means of a pair of pulse motors for changing relative position between a vertically reciprocating needle and a fabric supported within the embroidery frame. A phase sensor is arranged for continuously detecting a rotational phase of an upper drive shaft which governs a vertical position of the needle. The pulse motors are controlled such that a horizontal shift of the embroidery frame is prevented or discontinued in a particular circumstance for preventing breakage of the needle and/or damage of the fabric which would otherwise occur during the frame shift operation.

REFERENCES:
patent: 4506612 (1985-03-01), Yanagi
patent: 4754721 (1988-07-01), Skogward
patent: 4858542 (1989-08-01), Kato et al.

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