Bernina Bernette Rome 8 Instruction Manual page 74

Problem
1. The needle thread tension is too tight.
2. The needle thread is not threaded
correctly.
3. The needle is too heavy for the fabric
Seam
being sewn.
puckering
4. The stitch length is too long for the
fabric.
5. The presser foot pressure is not
correctly adjusted.
1. The correct presser foot is not used.
Patterns are
distorted
2. The needle thread tension is too tight.
1. Thread is caught in the hook.
The
machine
2. The feed dogs are packed with lint.
jams
1. Fluff have collected on the hook or
needle bar.
2. The needle is damaged.
The
3. Slight humming sound coming from
machine is
internal motor.
noisy
4. Thread is caught in the hook.
5. The feed dogs are packed with lint.
1. Poor quality thread.
Uneven 2. The bobbin case is threaded wrong.
stitches,
uneven feed
3. Fabric has been pulled.
1. The machine is not turned on.
The sewing
machine
2. The machine is not plugged in.
doesn't
operate
Cause Correction
1. Lossen the thread tension.
2. Rethread the machine.
3. Choose a needle to suit the thread and
fabric.
4. Make stitch dense.
5. Adjusting the presser foot pressure.
1. Select the correct foot.
2. Loosen the thread tension .
Remove the upper thread and bobbin
case, turn the handwheel backwards
and forwards by hand and remove the
thread remnants.
1. Clean the hook and feed dog as
described.
2. Replace the needle.
3. Normal.
Remove the upper thread and bobbin
case, turn the handwheel backwards
and forwards by hand and remove the
thread remnants.
1. Select a better quality thread.
2. Remove the bobbin case, the thread
and reinsert correctly.
3. Do not pull on the fabric while sewing,
let it be taken up by the machine.
1. Turn on the machine.
2. Connect the power line plug to the
electric outlet.
Trouble Shooting 73
Reference
16
12
20
25
16
28-29
16
71
71
11
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71
20
71
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6
6