Solutions

1. The needle doesn’t take good aim at the hole on the needle board

Turn the main shaft to 140 degree and adjust the position of the needle

2. Color-changing part changes positions

Adjust the part

3. Needle goes blunt

Change the needle

4. Lower shaft changes positions, and needle touches shuttle shell

Check whether the shuttle looses, and make sure the shell is in place.

5. Thread scissors aren’t in place

Check scissoring part and put scissors back in place

6. Switch on the motor while pulling thread

Change the habit

Solutions

1. Needle is poor in quality, bent or blunt

Change the needle

2. Size of needle misfits that of thread thickness

Change the needle or the thread

3. Tip of needle and tip of shuttle change positions

Check and adjust the 196 degree parameter

4. Height of needle shaft changes

Check and adjust the 172 degree parameter

5. Tension of upper thread misfits that of lower thread

Adjust their tension

6. Embroidered material isn’t firmly fixed

Adjust it

7. Skipping electromagnet fails to spring back

Adjust it

Reasons

Solutions

1. Tension of upper thread or that of lower thread is weak

Adjust it

2. Thread is not hard enough

Replace the thread

3. Tension of lower thread is unstable

Clean the shuttle shell

4. Shuttle doesn’t lubricate well

Add lube to it

5. Tension of thread misfits embroidery material

Adjust the tension

6. Shuttle shell goes out of shape

Replace it

Reasons

Solutions

1. Skipping electromagnet doesn’t act

Check whether thread and plug work well

2. Skipping electromagnet acts but changes positions

Check whether it looses and then adjust it

3. Connecting bolt on needle shaft changes positions, and move right and left

Check whether the gap between shield and connecting bolt is too large

4. Driving slide changes positions, abrades or is jammed

Check the slide and the cover, to find the jammed spot and adjust its position or replace it

5. Electric appliances reasons

Refer to the book of direction