Brother S-7300A-333P Instruction Manual page 105

Problem
15 Upper thread is raised
above the material surface
after thread trimming.
16 When T/T short is on,
skipped stitches
where they should
sewn at the sewing end.
17 When T/T short is on,
condense stitches
final stitch and the one
before it) cannot be sewn
neatly before
trimming.
18 Thread trailing length on
underside of material is
too long.
19
When T/T short is on,
thread trailing length on
underside of material is
too short.
20 To prevent fraying at the
sewing end
21
Incorrect thread trimming
(Upper and lower threads
are both not
trimmed)
・ Upper thread protrudes from the material surface after thread
trimming.
1. Increase the pitch during thread trimming.
2. Set the feed direction for sewing end processing to ↑.
Stitch pitch and sewing speed for
stitch before final stitch
Stitch pitch during thread trimming
・ Use the T/T short parameters to delete the the stitch before the final
occur
stitch.
be
・ Use the T/T short parameters to reduce the stitch pitch of the final
stitch and the one before it.
・ Use the T/T short parameters to set the feed direction for sewing end
processing to ↑.
If sewing backtack stitches
・ Reduce the number of stitches (D) for backtack sewing by 1 stitch
・ Use the T/T short parameters to increase the stitch pitch.
(the
・ Use the T/T short parameters to reduce the sewing speed.
thread
・ Turn on the T/T short function.
If you would like the trailing length to be even sorter after turning on the
T/T short function.
・ Is the meshing position of the thread trimming knives directly below
the needle hole?
・ Use the T/T short parameters to reduce the stitch pitch of the
condense stitches (the final stitch and the one before it) before
thread trimming.
・ Use the T/T short parameters to reduce the pitch during thread
trimming.
・ Use the T/T short parameters to increase the pitch during thread
trimming.
・ Turn on the T/T short function, and then use the T/T short parameters
to set the feed direction for sewing end processing to ↑.
・ Is the fixed knife or movable knife damaged or worn?
Replace the fixed knife or the movable knife.
being
・ Is there not enough of a meshing amount between the upper knife
and the lower knife?
Adjust the tip of the upper knife to the lower knife index position
so that the knives mesh.
Possible cause
Stitch pitch and sewing
speed for final stitch
S-7300A
14. TROUBLESHOOTING
Feed direction for sewing
end processing
Page
35*
35*
(94-15)
30*
35*
(94-15)
35*
82*
35*
(94-15)
35*
(94-15)
35*
(94-15)
82*
94