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Troubleshooting
f
Condition
The needle thread 1,
brea ks. 2
4
Cause Reference
5
6
7
The bobbin thread 1
breaks°
2
3
The needle breaks. 1
2
3
4
5
6
Skipped stitches 1
2
3
4
Seam puckering
The cloth is not
feeding smoothly°
The machine
doesn't work_
Patterns are
distorted.
Noisy operation
The needle thread is not threaded properly
The needle thread tension is too tight
The needle is bent or blunt,
The needle is incorrectly inserted
The needle thread and the bobbin thread are not set properly
under the presser foot when sewing is starting.
The fabric is not drawn to the rear when sewing is finished
The thread is too heavy or too fine for the needle
The bobbin thread is not threaded properly in the bobbin
case and shuttle
Lint has collected in the shuttle area
The bobbin is damaged and doesn't turn smoothly,
The needte is incorrectly inserted
The needle is bent or blunt
The needle clamp screw is loose
The needle thread tension is too tight.
The fabric is not drawn to the rear when sewing is finished.
The needle is too fine for the fabric being sewn
The needle is incorrectly inserted,
The needle is bent or blunt
The needle and/or threads are not suitable for the work being
sewn,
A blue needle is not being used for sewing stretch, very fine
fabrics and synthetics
5 The needle thread is not threaded properly
6 The wrong needle is used,
1_The needle thread tension is too tight
2 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
! The machine is not plugged in
2 The stitches are too fine.
3 The feed dog is not raised after "drop feed" sewing.
1. The feed dog is packed with lint
2 A thread is caught in the shuttle race
3. Push-clutch is disengaged.
1 The stitch is not balanced
1, There is thread caught in the hook race.
2, Lint has built up in the shuttle or the shuttle race,
Page 24
Pages26,28
Page lO
Page lO
Page 24
Page 32
Page14
Page 22
Page 64
Changethe bobbin
Page lO
Page lO
Page lO
Pages26,28
Page 32
Paget4
Page 10
Page tO
Page14
Page14
Page 24
Changethe needle
Pages 26,28
Page 24
Page14
Make stitch denser
Page 6
Make stitch coarser
Page 38
Page62
Page64
Pages18,20
Page 30
Page 64
Page64
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