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2-2) Pressing is inappropriate.
2-A) The pressure is too high.
Minimize the pressure. For some materials, sewing with the
presser slightly floated with the adjustable screw of the
minute presser lifter is effective.
2-B) The finish of the backside of the
Use of a buff or the like to smooth the presser.
presser is rough.
2-C) The presser is made from
Use a fluorine resin presser or a special processed presser.
Nonsmooth material.
2-3) The feeding speed is too high.
Reduce the feeding speed.
3. Balloon stitches
3-1) The thread tension is too low.
Increase the 2nd thread tension.
3-2) The thread take-up spring is
2-A) The stroke of the thread take-
The thread take-up spring with too short stroke cannot sufficiently
inappropriately adjusted.
up spring is too short.
take up the loosened thread resulting in a higher possibility
of balloon stitches or thread breakage.
The thread take-up spring with too low tension cannot function
well at high speeds or sufficiently take up the thread resulting
in a higher possibility of balloon stitches or thread breakage.
2-B) The tension is too low.
The thread take-up spring with too low tension cannot function
well at high speeds or sufficiently take up the thread
resulting in a higher possibility of balloon stitches or thread
breakage.
2-C) The shape of the thread take-
Thread slack may cause catching thread when the tip of
up spring is inappropriate.
the thread take-up spring is open. If the open level is too
wide, use your finger to close the tip.
2-D) The thread take-up spring tension
When #60 or thicker thread is used, the thread take-up spring
is insufficient.
used in the A type is too weak to exert its effect due to
The following capability is
insufficient tension of the spring at the end of the operation.
insufficient at high speeds.
In such a case, use a standard type thread take-up spring
(or thread tension).
3-3) The stroke of the thread take-
Move the arm thread guide rightward to reduce the thread
up lever is too long.
feeding with the thread take-up lever.
3-4) Knife thread guide position is
Align the knife thread guide to the needle entry position.
improper.
Trouble
Case (1)
Case (2)
Check and Corrective measures
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Summary of Contents for DDL-9000B-DS
Page 14: ... 10 4 Feed locus and phase 1 Timing standard 2 Timing fast 3 Timing slow Standard Adjustment ...
Page 32: ... 28 8 Adjustment of the amount of feeding 4 Optional switch Standard Adjustment ...
Page 58: ... 54 11 Thread trimming unit 8 Replacement of the moving knife Standard Adjustment ...
Page 70: ... 66 12 Adjustment of the wiper DDL 9000B WB 2mm 1mm Standard Adjustment ...
Page 112: ...MEMO ...