– 100 –
3-9) Pressing is inappropriate.
9-A) The presser is floating.
Adjust the clearance between the presser bar holder and
lifting plate. (The clearance shall be within 0.8 to 1.2mm
when the presser is closely contacted with the throat plate.)
9-B) The thread relief on the backside
Use a foot with a large thread relief on the backside.
of the presser does not exist or
is too small. This trouble occurs
especially when the pitch is large
or thick thread is used.
3-10) The thread tension device is
10-A) The thread tension disk is floating.
Adjust the timing of the thread tension disk floating with
defective.
reference to 3.-(11)-5).
3-11) The needle hole of the throat
Use a throat plate with a larger needle hole.
plate is too small.
3-12) The needle is too thin for the
Change the needle or thread to be used.
thread to be used.
3-13) The needle is defective.
13-A) A burr exists on the tip of the needle.
Replace the needle.
4. Stitch skipping
4-1) The needle is defective.
1-A) The needle is bent.
Replace the needle.
1-B) The needle mounting direction
Mount the needle appropriately. Replace the needle clamp
is inappropriate.
screw. Defective sewing is likely to occur when the needle
The needle is not mounted fully
recess portion faces frontward.
to the end.
1-C) The needle tip is blunt.
Replace the needle.
1-D) The needle is too thin or thick
Replace the needle.
for the thread to be used.
1-E) The feeding force is too weak.
Lift the feed dog height.
4-2) The matters related to the hook
2-A) The blade top of the hook is
Sharpen the blade top of the hook or replace the hook.
are inappropriate.
blunt or worn
2-B) The timing of the hook is inappr
Readjust the timing. (Set the timing to the earlier level when
opriate.
a needle thread loop is likely to be created and to the later
level when a needle thread loop is not likely to be created
depending on the conditions of the material and thread.)
2-C) The height of the needle bar is
Perform upper or lower adjustment against the blade top.
ina ppropriate.
2-D) The clearance at the blade
Decrease the clearance at the blade top of the hook.
top of the hook is inappropriate.
2-E) The loop shape is unstable.
Wind the needle thread or use the T-type thread guide
(mesh type materials)
(B1418227T00).
2-F) A needle holder does not exist.
Replace the current hook with a hook with a needle holder
equipped. 11141355 for SS, 22890404 for DS
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 ...
