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Condition
The needle thread
breaks.
The bobbin thread
breaks.
Cause
1_The needle thread is not threaded properly,
2. The needle thread tension is too light.
3. The needle is bent or blunt.
4. The needle is incorrectly inserted,,
5_ The needle thread and the bobbin thread are not set
properly under (drawn to the rear of) the presser
foot when sewing is starting°
6. The fabric is not drawn to the rear when sewing is
finished,
7. The thread is too heavy or too fine for the needle.
1. The bobbin thread is not threaded properly in the
bobbin holder.
2o Lint has collected in the bobbin holder,
Reference
Page 38
Page 44
Page 26
Page 26
Page 42
Page 46
Page 28 ................................
Page 36
Page 120
The needle breaks, 1
3. The bobbinis damaged and doesn'tturn smoothly Changethe bobbin
Page 26
Page 26
Page 26
Page 44
Page 46
Page 28
Screen is not clear,
Skipped stitches
• Needle isincorrectly inserted,,
2. The needle is bent or blunL
3, The needle clamp screw is too loose,
4o The needle thread tension istoo tight°
5,. The fabric is not drawn to the rear when sewing is
finished,
6,, The needle is too fine for the fabric being sewn.
1o The sharpness of the liquid crystal display is not
adjusted ,properly,.....................................
1,.The needle is incorrectly inserted.
2. The needle is bent or blunt.,
3. The needle and!or thread are not suitable for the work
being sewn,,
4. A blue needle is not being used for sewing stretch,
very fine fabrics and synthetics,
5. The needle thread is not threaded properly.
6o The presser foot pressure is not strong enough°
7, The wrong needle is used.
1. The needle thread tension istoo tight.
24 The needle thread is not threaded properly,
3, The needle is too heavy for the fabric being sewn.
4. The stitch length is too long for the fabric.
5. The presser foot pressure is not correctly adjusted.
1_ The feed dog is packed with lint.
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
Seam puckering
The cloth is not
feeding smoothly.
Page1,2 ..............................................
Page 26
Page 26
Page 28
Page 28
Page 38
Page 24
Changethe need!e
Page 44
Page 38
Page 28
Make stitch denser
Page 24
Page 118
Page 24
Make sti_h coaser
use& Page 24
The machine 1, The machine is not plugged ino Page 10
doesn't work. 2o A thread is caught in the hook race. Page 118
3. The bobbin winder spindle is still in the winding
position. Page 34
1. The stitch is not balanced. Page 100
Patterns are
distorted.
The automatic
buttonhole
stitches are not
working.
1. The stitch density is not suitable for the fabric being
sewn°
2. Interfacing is not being used with stretch fabrics.
Page 70
Page 66
J
122