SEWING QUALITY CONTROL IN SEWING MACHINE

SEWING QUALITY CONTROL IN SEWING MACHINE

Disclosed is a sewing machine which evaluates sewing quality using a stitch tightness index. During sewing operation, a used length of an upper thread (U) per stitch is detected, and a stitch tightness index (Ks) per sewn stitch is calculated on the basis of a stitch length (M) per stitch defined by...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ONO, Masayoshi, OHASHI, Isao, UENISHI, Hirotsugu, TAKIZAWA, Yoshichika, NAKAMURA, Koichi
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
EMBROIDERING
SEWING
TEXTILES
TUFTING
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Beschreibung
Zusammenfassung:Disclosed is a sewing machine which evaluates sewing quality using a stitch tightness index. During sewing operation, a used length of an upper thread (U) per stitch is detected, and a stitch tightness index (Ks) per sewn stitch is calculated on the basis of a stitch length (M) per stitch defined by sewing pattern data, a fabric thickness (t) of a sewing workpiece, and detected data of the used length of the upper thread (U). Then, notification is made which corresponds to the calculated stitch tightness index (Ks) per sewn stitch (such as a visual display of the stitch tightness index (Ks)). After that, acceptability/non-acceptability of the thread tightness per sewn stitch can be determined by comparing the calculated stitch tightness index (Ks) per sewn stitch against a reference value (Kref), and a result of the determination can be notified.