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1-2) An inappropriate needle, throat
2-A) The dimension A of the foot is
Check whether the shapes of the A and B portions of the
plate, or presser is used.
too large. Too much clearance
presser and the C portion of the throat plate are appropriate.
Alternatively, the pressure of the
on the underside of B interferes
* For sewing tricot with chemical fiber thread: A < 0.8 mm
presser is too low.
with pressing the needle thread
Rs of B and C portions < 0.3 mm
when a sewing pitch is short.
* For using chemical fiber thread: A < 1.2 mm,
B and C portions without clearance recommended
* For using cotton thread: smaller clearance at A, B and C
portions recommended unless there is no defective
thread tension
2-B) The clearance at the C portion
of the throat plate is too much.
1-3) The sewing material is likely to
3-A) The thread is not held and is
Use a thinner needle or the T-type needle bar thread guide
hold sewing traces or loose.
likely to be released because
(B1418227T00).
the needle traces on the material
do not recover. Alternatively, the
thread is likely to be released
from a loose material.
3-B) The needle is too thick.
The thinner the needle is, the better the situation becomes
unless no defective needle thread tension is found.
3-C) The needle hole of the throat
Replace the current throat plate with a throat plate with smaller
plate is too large
needle hole.
3-D) The pressure is too low.
Use the presser stroke adjusting screw to increase the
pressure without decreasing the feeding force (or without
causing clogging).
1-4) The blade top of the hook does
4-A) The timing between the needle
Check the needle bar height, and align it with the ruled line
not scoop the needle.
and hook is inappropriate.
on the needle bar. For sewing knitted cloth, lower the
(stitch skipping)
needle bar slightly to delay the timing.
4-B) The tension and momentum of
Decrease the tension and momentum.
the thread take-up spring are
too high.
4-C) The blade top of the hook is
Reshape the blade top or replace the hook.
worn out.
4-D) The needle is inappropriately
Adjust the needle inclination, or replace the needle if the
mounted.
current needle is bent.
B
C
Trouble
Case (1)
Case (2)
Check and Corrective measures
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Содержание DDL-9000A
Страница 14: ... 10 4 Feed locus and phase 1 Timing standard 2 Timing fast 3 Timing slow Standard Adjustment ...
Страница 24: ... 20 7 Lubrication 4 Cleaning of the oil filter DDL 9000A S and DDL 9000A M only Standard Adjustment ...
Страница 32: ... 28 8 Adjustment of the amount of feeding 4 Optional switch Standard Adjustment ...
Страница 56: ... 52 11 Thread trimming unit 5 Adjustment of rise of the second thread tension disc Standard Adjustment ...
Страница 60: ... 56 11 Thread trimming unit 7 Replacement of the moving knife Standard Adjustment ...
Страница 66: ... 62 11 Thread trimming unit 10 Adjustment of the drive arm stopper Standard Adjustment ...
Страница 70: ... 66 12 Adjustment of the wiper DDL 9000A WB OB 2mm 1mm Standard Adjustment ...
Страница 72: ... 68 13 Adjustment of feed lever pressure B A Feed lever Standard Adjustment ...
Страница 112: ...MEMO ...
