Brother 884-T05 Operation Manual page 259

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Symptom
The upper thread
breaks.
The bobbin
thread breaks.
Stitches are
skipped.
The embroidery
pattern is
misaligned.
Probable Cause
The automatic needle-threading
mechanism is broken.
Adhesive is attached to the
needle.
The fabric is not taut.
The thread quality is poor.
The embroidery data contains
stitches with a pitch of zero.
The embroidery data contains
many stitches with an extremely
small pitch.
The thread density of the
embroidery data is too fine.
Three or more overlapping
stitches are being sewn.
The bobbin thread is not
correctly threaded.
The bobbin is scratched or does
not rotate smoothly.
The bobbin case is damaged.
The thread is tangled.
A bobbin designed specifically
for this machine is not used.
The upper thread is not
threaded correctly.
The needle is bent or blunt.
The needle is not installed
correctly.
Dust has accumulated under the
needle plate or in the hook.
The needle and the hook are not
correctly passing each other.
The thread twist is either too
tight or too loose.
The thread is tangled.
The fabric is not well framed in
the embroidery frame (for
example, the fabric is not taut).
The embroidery frame is too
large for the size of the
embroidery.
Remedy
Consult your nearest
authorized dealer.
Replace the needle.
Firmly set the fabric in the
embroidery frame so that it is
taut.
The thread quality is too weak
due to age of thread. Replace
thread.
Delete all stitches with a zero
pitch.
Delete all stitches with a small
pitch.
Using a data design system,
correct the thread density and
overstitching settings in the
embroidery data.
Correctly thread the bobbin
thread.
Replace the bobbin.
Replace the bobbin case.
Remove the thread jammed
and clean the hook.
Use the correct bobbin.
Thread the upper thread
correctly.
Replace the needle with a new
one.
Correctly install the needle.
Clean the hook and the needle
plate.
Consult your nearest
authorized dealer.
Improper twisting results in
irregular loop formation. Try
using a new spool.
Use tweezers to remove any
tangled thread from the hook.
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.
Use an embroidery frame that
is close to the size of the
embroidery.
Reference Page
p.86
p.47, 91
p.201
p.201
p.136
p.36
p.36
p.36
p.245
p.33
p.55
p.33, 86
p.86
p.245, 246
p.47, 91
p.88
Troubleshooting 257
7