JUKI MF-7800D Series, Руководство инженера

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5-12) Irregular stitches in top 12-A) Spreader A-1) Flaw in pointed end of spreader Replace when modified or its shape is changed
covering stitches obstructs smooth thread too much.
threading.
12-B) Spreader adjustment B-1) Spreader stroke is too large. Refer to the standard adjustment figures.
12-C) Thread guide C-1) Flaw, burr in slot Replace when modified or its shape is changed
too much.
12-D) Top covering thread D-1) Drawing-in amount of top covering Refer to the standard adjustment figures.
take-up thread is too much or too little.
12-E) Needle thread tension E-1) Needle thread tension is too weak. Increase tension.
12-F) Threading F-1) Incorrect threading Refer to threading diagram.
12-G) Top covering thread G-1) Thread tension is too weak. Increase tension.
tension
12-H) Looper thread cam H-1) Drawing-in amount of looper Reduce drawing-in amount of thread.
thread guide position thread is too much.
12-I) Stitch tongue of presser I-1) Thread threading is not smooth due Replace when modified or its shape is changed
foot to incorrect shape of stitch tongue. too much.
5-13) Bulge 13-A) Throat plate A-1) Stitch tongue is too short. Use throat plate provided with long stitch tongue.
13-B) Threading B-1) Incorrect threading Refer to threading diagram.
13-C) Needle thread tension C-1) Tension is too weak. Increase tension.
13-D) Looper thread tension D-1) Tension is too strong. Reduce tension.
13-E) Looper thread cam E-1) Drawing-in amount of upper thread Increase drawing-in amount.
thread guide position is too little.
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Trouble (1) Trouble (2) Cause (1) Cause (2) Corrective measures
Flaw