Pfaff Tipmatic 1027 Owner's Manual - Page 27

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4 Cause: Remedy: 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. 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. Remove needle plate and clean out lint. Feed dog dropped. (Reverse-feed control is at left.) Flick reverse-feed control to the right. 6. Machine runs with difficulty Thread ends in hook raceway. Remove thread ends and put a drop of oil into hook raceway. 23

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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