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Brother PR-670E Manual

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220
The upper thread breaks.
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.30
A bobbin designed specifically for this machine
is not used.
• Use the correct bobbin.
p.30
The automatic needle-threading mechanism is
broken.
*
Adhesive is attached to the needle.
• Replace the needle.
p.79
The fabric is not taut.
• Firmly set the fabric in the embroidery frame
so that it is taut.
p.42
p.85
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.184
The embroidery data contains many stitches
with an extremely small pitch.
• Delete all stitches with a small pitch.
p.184
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.123
Lint or dust has accumulated in the thread
tension disc.
• Remove the tension dials, and then remove
any lint or dust accumulated between the felt
washers.
p.213
The bobbin thread breaks.
The bobbin thread is not correctly threaded.
• Correctly thread the bobbin thread.
p.33
The bobbin is scratched or does not rotate
smoothly.
• Replace the bobbin.
p.33
The bobbin case is damaged.
• Replace the bobbin case.
p.33
The thread is tangled.
• Remove the thread jammed and clean the
hook.
p.210
A bobbin designed specifically for this machine
is not used.
• Use the correct bobbin.
p.30
Lint or dust has accumulated in the thread
tension disc.
• Remove the tension dials, and then remove
any lint or dust accumulated between the felt
washers.
p.213
Symptom
Probable Cause/Remedy Page
Stitches are skipped.
The upper thread is not threaded correctly.
• Thread the upper thread correctly.
p.50
The needle is bent or blunt.
• Replace the needle with a new one.
p.30
p.79
The needle is not installed correctly.
• Correctly install the needle.
p.79
Dust has accumulated under the needle plate or
in the hook.
• Clean the hook and the needle plate.
p.210
p.211
The needle and the hook are not correctly
passing each other.
*
The thread twist is either too tight or too loose.
• Improper twisting results in irregular loop
formation. Try using a new spool.
–
The embroidery pattern is misaligned.
The thread is tangled.
• Use tweezers to remove any tangled thread
from the hook.
–
The fabric is not secured in the embroidery
frame (for example, the fabric is not taut).
• If the fabric is not taut, the pattern may
become misaligned or the stitching may
shrink. Be sure to correctly frame the fabric in
the embroidery frame.
p.42
p.85
The embroidery frame is too large for the size of
the embroidery.
• Use an embroidery frame that is close to the
size of the embroidery.
p.80
The thumbscrews on the embroidery frame
holder are loose.
• Use the included disc-shaped screwdriver to
firmly tighten the thumbscrews.
p.28
Stabilizer (backing) is not used.
• Use stabilizer (backing) when embroidering
on thin or stretch fabrics, fabrics with a
coarse weave or fabrics that easily allow the
stitching to shrink.
<When using the optional cap frame>
Use hard stabilizer when embroidering on a
cap made of soft material.
p.84
The embroidery frame is not correctly attached
to the carriage.
• Correctly attach the embroidery frame to the
carriage. Make sure that the pins on the left
and right arms of the embroidery frame
holder securely fit into the holes in the
handles on the embroidery frame.
p.45
The carriage or the embroidery frame is hitting
objects.
• The pattern may become misaligned if the
carriage or embroidery frame is hitting
objects. Make sure that there are no objects
within the operating field of the embroidery
frame.
–
The fabric is caught or pinched.
• Stop the machine, and then correctly position
the fabric.
–
Symptom
Probable Cause/Remedy Page
… 222 …


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