Brother PR-620 Operation Manual page 221

APPENDIX —————————————————————————————————————————————————————
Symptom
Stabilizer (backing) is not used.
The embroidery frame is not
correctly attached to the
carriage.
The carriage or the embroidery
frame is hitting objects.
The embroidery
pattern is
The fabric is caught or pinched.
misaligned.
The carriage moved while
removing embroidery frame.
The design was not digitized
correctly.
The upper thread tension is low.
There are loops in
the upper thread.
204
Probable Cause Remedy
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.
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.
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.
Stop the machine, and then
correctly position the fabric.
The pattern may become
misaligned if the presser foot
was hit or the carriage was
moved while replacing bobbin
thread, changing needle, or
working near embroidery frame.
Be careful when removing and
reattaching the embroidery
frame while replacing bobbin
thread, changing needle, or
working near embroidery frame.
If the carriage is moved, turn the
machine off, then on again. The
correct frame position at the
time that the machine was
stopped is stored in the
machine's memory, and the
embroidery frame is returned to
the correct position.
The design may need more pull
compensation or underlay to
accommodate stretchy or high-
napped fabrics.
After passing the upper thread
through the hole in the presser
foot, pull the thread by hand to
check the thread tension. If it is
difficult to determine, compare
it with other needle bars where
looping does not occur.
Reference Page
p.66
p.30
p.86