1.14
Troubleshooting
.
-18-
Problems
Possible Causes
Possible Solutions
Needle
1. Needle is installed wrong
1. Install needle correctly
2. Wrong needle type or size
2. Use proper needle for fabric and thread
3. Needle is bended
3. Change the needle
4.Wrong relation with needle guards
4. Readjust the needle guard
5. Wrong relation with looper
5. Readjust the looper
6. Needle doesn?t center the needle slot of
needle plate or presser foot
6. Readjust the needle plate or presser foot
Thread
1. Low qualit y thread
1. Change the thread
2. Thread is thicker than needle hole
2. Use proper needle for fabric and thread
3. Wrong threading
3. Rethread the machine correctly
4. Thread tension is too strong
4. Readjust the thread tension unit
5. Needle is installed wrong
5. Install needle correctly
6. Thread stand installed wrong
6. Install thread stand correctly
7. Overheat of the needle
7. Fill in the silicon oil and/or readjust the
8. Thread disc or guide is burred
8. Grind off, polish or replace by a new part
9. Wrong relation of needle and looper
9. Readjust needle and looper relation
10.Needle, looper, needle plate and guide are
10.Grind off, polish or replace by a new part
Skip
1.Wrong relation of needle and looper
1. Readjust needle and looper
2.Wrong threading
2. Rethread the machine correctly
3.Needle is installed wrong
3. Install needle correctly
4. Inadequate thread tension
4. Readjust the thread tension nuts
5. Looper point is damaged
5. Replace by a new part
6. Needle is bended
6. Change the needle
7. Wrong installation of needle guard
7. Install needle guard correctly
break
break
stitches
Loosen
1.
1. Rethread the machine correctly
2.
2.Use proper needle for fabric and thread
3.
3. Readjust the thread tension unit
4. Needle thread is not lubricated
4. Fill in the silicon oil
5. Wrong setting of needle and loopers
5. Readjust needle and loopers
Uneven
1.Wrong threading
1. Rethread the machine correctly
2.Thread stand installed wrong
2. Install thread stand correctly
3.
Lo
wer knife inst alled wrong
3.
Install l
ow er knife correctly
4. Knives do not trim neatly
4. Readjust knife and/or sharpen or replace it
5. Thread disc or guide is burred
5. Grind off, polish or replace by a new part
6. Needle point is damaged
6. Change the needle
7. Inadequate height of feed dog
7. Readjust the feed dogs
8. Inadequate thread tension
8. Readjust the thread tension unit
stitches
stitches
Inadequate thread tension
burred
needle guard
Wrong threading
Thread is thicker than needle hole
Содержание ZJW662
Страница 1: ...1 INSTRUCTION MANUAL ...
Страница 6: ... 5 1 3 Installing the sewing machine _ X Table Cut Out Drawing Figure 1A D Clutch Motor Z ...
Страница 7: ... 6 1 3 Installing the sewing machine _ X For ESDD Figure 1B D Table Cut Out Drawing XYZ Motor only ...
Страница 21: ...2 PARTS LIST ...
Страница 22: ...2 1 A Machine bed frame A 4 5 4 7 21 8 18 9 9 10 11 12 1 13 19 6 3 20 2 16 14 15 22 17 20 ...
Страница 26: ...7 6 27 10 9 8 11 12 23 22 3 17 18 16 19 15 13 25 24 21 14 26 2 1 4 3 3 2 1 C Machine bed frame C 24 28 29 ...
Страница 28: ...1 2 4 4 3 5 6 7 8 21 8 9 11 8 23 22 20 19 17 16 8 13 14 18 2 2 Crank shaft drive mechanism 26 25 24 26 ...
Страница 44: ...6 4 5 24 3 2 1 7 8 10 11 14 16 15 18 26 25 19 20 22 21 23 12 17 13 9 2 8 Spreader mechanism 42 27 28 28 ...
Страница 54: ...11 7 10 9 14 15 16 17 8 10 13 12 22 21 20 18 19 4 5 3 2 1 25 24 23 2 12 B Lubrication mechanism B 6 52 ...
Страница 56: ...5 6 3 4 2 1 7 8 13 11 12 9 10 14 15 2 13 HR device 54 ...
Страница 62: ...10 9 5 12 11 14 6 13 7 2 3 4 8 1 15 2 16 ESDD Motor structure 60 ...