Operation Manual

4
Check upper and lower
tensions.
Use first-class thread
only.
During bobbin winding,
do
not
hold
thread in
hand, but pass
it
through
the
bobbin tension
stud.
Thread machine
properly and check
both tensions.
5.
Machine feeds irregularly
or not at all
Lint has accumulated
between
tooth
rows of
feed dog.
Feed
dog dropped. (Reverse-feed
control
is at
left.)
Remedy:
Cause:
4.
Seam is
not uniform
Tension out of adjustment.
Thread too thick,
knotty or hard.
Bobbin
thread
wound
unevenly.
Kinks appear
on
top
and
bottom
of
material.
6.
Machine runs
with
difficulty
Thread
ends
in hook raceway.
Remove
needle
plate and
clean
out
lint.
Flick reverse-feed
control to
the
right.
Remove
thread ends and
put a
drop
of
oil into hook
raceway.
23