CONDITION
CAUSE
HOW TO FIX
REFERENCE
(4)
FEEDING AND CUTTING FABRRIC
1. Fabric
does not
feed
properly.
2. Uneven
feeding.
3. Differen-
tial feed
4. Knife
1. presser foot is in up position.
2. Stitch length is too short.
3. Presser foot pressure is too
weak.
4. Lint is stuck in the feed dog.
5. Feed dog height is not correct.
6. Feed dog is worn or broken.
7. Differential feed mechanism is
working.
8. Feed dog timing is off.
9. Knife is dull.
1. Presser foot pressure is weak.
2. Knife is dull.
3. Feed dog timing is off.
1. Feed dog height is not correct.
2. Feed dog timing is off.
3. Knife is dull.
4. Presser foot pressure is too
weak.
5. Main and sub feed dogs are not
aligned.
1. Knife blades are not over lapping
enough.
2. Something is caught between the
knife blades.
3. Upper knife is worn or broken.
4. Lower knife is worn or broken.
5. Presser foot pressure is too
weak
Lower the presser foot.
Standard length is 2.5 to 3.5 mm.
Adjust the pressure with the adjusting screw.
Remove the lint from the feed dog.
Adjust the feed dog height.
Replace the feed dog.
Adjust the differential feed ratio.
Adjust feed dog timing.
Adjust the position of the knives.
Adjust knife timing.
Replace the upper knife.
Adjust pressure with the presser adjusting
screw.
Adjust position of knives.
If knife is worn or broken replace it.
Adjust feed dog timing.
Adjust the feed dog height.
Adjust the feed dog timing.
Confirm relationship of upper and lower knife.
Adjust the pressure with the pressure adjusting
screw.
Adjust the feed dog height.
Increase the overlap of the blades.
Remove the foreign object.
Replace it.
Replace it.
Adjust the pressure with the pressure adjusting
screw.
P 15
P 16
P 27
P 17
P 27, 28
P 27, 28
P 16
P 15
P 16
P 27, 28
P 5,15, 31
P 27
P 27, 28
P 27, 28
5
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Содержание myLock 134D
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