Sewing – Special machines – Darning
Patent
1984-02-06
1986-01-21
Nerbun, Peter
Sewing
Special machines
Darning
1122621, 112272, 112275, D05B 1900
Patent
active
045651400
ABSTRACT:
An adaptive semi-automatic sewing system (10) comprises a sewing machine (12), a drive unit (42) including a variable speed motor and encoder for counting stitches sewn and for sensing the rotation of the motor, at least one material edge sensor (40a) mounted ahead of the needle (22) of the sewing machine, and a microprocessor controller (51) coupled to the sewing machine controls. Accurate control of seam lengths and end points is achieved by initiating countdown of a variable number of final stitches responsive to detection of the material edge by the sensors (40a). The system includes controls (98) coupled to microprocessor controller (51) for dynamically adjusting the sensitivity of the sensors (40a) for variances in the materials being sewn.
REFERENCES:
patent: 4403558 (1983-09-01), Martell et al.
patent: 4404919 (1983-09-01), Martell et al.
patent: 4487502 (1984-12-01), Fantozzi et al.
Isett Donald D.
Martell Charles R.
Treadwell Stephen S.
Howison Gregory M.
Microdynamics, Inc.
Mills Jerry W.
Nerbun Peter
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