HIGHLEAD GM747-3 Instruction Manual Parts Catalog page 9

Uneven stitches
REASON
I. Wrong threading.
2. Thread stand installed wrong.
3. Lower Knife installed wrong.
4. Khives do not trim neatly.
(I )Knives installed wrong.
(2)Dulllower knife.
5. Thread Disc or Guide in burred.
6. Needle point is damaged.
7. Inadequate height of feed dogs.
8. Inadequate thread tension.
Wrinkled stitches
REASON
I. Thread tension is too strong.
2. Inadequate pressure of presser foot.
3. Inadequate height of feed dogs.
4. Knives do not trim neatly.
5. Differential feed is not matched.
6. Needle is too thick.
7. Seam width is too narrow against
the chain of finger ofNeedle plate.
CORRECT
I . Rdhreading correctly.
2. Reset Thread for threading smoothly.
3. Readjust 1 Ower knife.
4. Correct as follow:
(I )Readjust Knives.
(2)Sharpen or replace new knives.
5. Gring off, Polish or replace new one.
6. Replace new Needle.
7. Readjust feed dogs.
8. Readjust Thread tension nut.
CORRECT
I. Readjust thread tension nut.
2. Readjust Presser foot pressure.
3. Readjust feed dogs.
4. Readiust knives or sharpen knives.
5. Readjust differential feed ratio.
6. Use proper Needle for fabric and thread.
7. Readiust seam width or replace the chain
or
finger.
Thread chain does not come out smoothly
REASON CORRECT
1. Presser foot installed wrong. I.
Reset presser foot correctly
2.
Inadequate timing of looper thread cam.
2. Readjust Looper thread Cam.
3. Double chain looper installed wrong. 3. Reset Double chain looper correctly.
4. Wrong threading.
4. Rethreading correctly.
5. Inadequate or too strong thread tension. 5. Readjust Thread tension nut.
6.
Wrong relation of Needle and looper.
6. Readjust Needle and looper.
7. Needle Plate Thread Disc or Presser foot
7. Gring off, polish
or replace new one.
is burred.
8. Thread tension disk is rough. 8. Polish thread tension disk.
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