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Condition Cause Reference
Seam puckering.
The cloth is not feeding
smoothly,
Gathering.
The machine doesn't work,
Patterns are distorted.
The automatic buttonhole
stitches are not working.
Noisy operation.
Machine is stopped on the
sewing, ignore the button
you pressor does not
changethe display on the
LCD.
1. The needle thread tension is too tight.
2. The needle thread is not threaded correctly.
3. The needle _stoo heavy for the fabric being sewn,
4, The stitch length is too tong for the fabric.
5. The presser foot pressure is not correctly adjusted,
1, The feed dog is packed with |int.
2, The presser foot pressure is too weak.
3. The stitches are too fine.
4. The feed dog was not raised after "drop feed" was used.
1. The needle thread tension is too loose.
2. The needle is too heavy or bight for the fabrics being sewn,
1. The machine is not plugged in or plugs are not fully inserted.
2. A thread is caught in the hook race,
3, The bobbin winder spindle is kept in the winding posit_on.
1. The bobbin winder spindle is kept in the winding position.
1. The stitch length is not suitable for the fabric being sewn.
2. Interfacing Js not used w=th stretch fabrics.
t. There is thread caught in the hook race.
2, Lint has built up in the bobbin holder or hook race.
3. When turn on the power switch, slight resonant sound is coming out from the
stepping motors.
Safety circuit for static electricity countermeasure is working,
Refer to page 23
Refer to page 21
Refer to page 17
Make stitch dense
Refer to page 8
Refer to page 99
Refer to page 8
Make stitch coarsen
Refer to page 32
Refer to page 23
Refer to page 17
Refer to page 7
Refer to page 99
Refer to page 19
Refer to page 19
Refer to page 68
Use interfacing
Refer to page 99
Refer to page 99
Not abnormal
Turn off the power switch once, and
turn on the power switch again.
98