Control apparatus for automatic embroidery sewing machine

Details Control apparatus for automatic embroidery sewing machine Control apparatus for automatic embroidery sewing machine

1980-11-04

1982-12-28

Nerbun, Peter P.

Sewing

Special machines

Embroidering

11212112, D05C 906, D05B 2100

Patent

active

043655653

ABSTRACT:
A control apparatus for the embroidery sewing machine which comprises at least two D.C. servomotors for providing controlled power output for driving an embroidery frame, one pair of sensors responsive to rotation of the servomotors for providing detect signals in the form of feedback signals, a presettable counter located at pre-stage to a servomotor drive output amplifier circuit and having an input of the feedback signals in the form of up/down signals, the presettable counter containing a preset value for one stitch operation and counting up or down toward making the preset value zero according to the feedback signal resulting in a residual value if the servomotors are incompletely actuated, and correcting means for superposing the residual value in the counter with a value to be set therein for the next succeeding stitch operation, whereby integral accumulation of errors due to incomplete actuation of each servomotor for each stitch operation can be effectively eliminated. The control apparatus further includes indicator elements which tell the appropriate operation in progress and the completion thereof, and control keys which permit a repetitive operation including a return and an advance, a stop, etc. as required.

REFERENCES:
patent: 4108090 (1978-08-01), Landau, Jr. et al.
patent: 4133275 (1979-01-01), Herzer et al.
patent: 4254724 (1981-03-01), Conrads
patent: 4280420 (1981-07-01), Nishida et al.
patent: 4309950 (1982-01-01), Franklin

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