APPENDIX
291
7
The upper thread
breaks.
Sliding surface on hook is not smooth.
There are burns on it.
1
Hook race area
Consult your nearest authorized Baby
Lock retailer.
The thread is loose in the hook area.
Remove the loose thread. If the thread
is tangled in the hook, clean the hook.
p.281
The play between the hook and the
race is too much.
Consult your nearest authorized Baby
Lock retailer.
The hook does not rotate smoothly.
Remove lint, clean and apply oil.
p.281, 285
The space between the hook stopper
and the hook cannot be adjusted.
Consult your nearest authorized Baby
Lock retailer.
The upper thread is not threaded
correctly.
Pull the upper thread by hand from
below the presser foot, and check that
the thread moves smoothly. If the
thread does not move smoothly, it is
not correctly threaded.
Un-thread the machine and
re-thread the machine.
Make sure the thread is correctly
positioned in the needle bar thread
guide.
p.57-60
Upper thread is not positioned in upper
or middle thread guide.
Make sure thread passes completely
under upper and middle thread guide.
p.57-60
There are knots or tangles in the thread.
Remove any knots or tangles.
The upper thread tension is too high.
Decrease the upper thread tension.
p.125
The lower thread tension is incorrect.
The thread does not roll out of the
bobbin case smoothly.
Adjust the lower thread tension.
p.124
The bobbin case is damaged.
Replace the bobbin case with a new
one.
p.33
The bobbin thread is not wound
correctly.
Check that the bobbin is wound so that
it is about 80% full and that the thread
is evenly wound. If the bobbin is not
correctly wound, replace the bobbin
with one that is correctly wound or
rewind the bobbin.
p.33
A bobbin designed specifically for this
machine is not used.
Use the correct bobbin.
p.33
The automatic needle-threading
mechanism is broken.
Consult your nearest authorized Baby
Lock retailer.
Adhesive is attached to the needle.
Replace the needle.
p.86
The fabric is not taut.
Firmly set the fabric in the embroidery
frame so that it is taut.
p.48, 93
The thread quality is poor.
The thread quality is too weak due to
age of thread. Replace thread.
The embroidery data contains stitches
with a pitch of zero.
Delete all stitches with a zero pitch.
p.228
The embroidery data contains many
stitches with an extremely small pitch.
Delete all stitches with a small pitch.
p.228
The thread density of the embroidery
data is too fine.
Three or more overlapping stitches are
being sewn.
Using a data design system, correct the
thread density and overstitching
settings in the embroidery data.
p.148
Symptom
Probable Cause
Remedy
Reference Page
