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Pfaff Hobby 350 Manual

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I
Faults
and how
to
remedy
them
Cause:
Remedy:
54
1.
Machine
skips
stitches
Needle not
inserted
correctly.
Wrong
needle
used.
Needle
bent
or
blunt.
Machine
threaded
incorrectly.
Needle
too
thin
for
thread
used.
2.
Needle
thread
breaks
For
any
of
the
above
reasons.
Thread
tension
too
strong.
Poor-quality
or
knotty
thread
used,
or
thread
that
has
become
too
dry
by
excessive
storage.
3.
Needle
breaks
Needle
not
pushed
up
as
faras
it
will
go.
Needle
bent.
Needle
too
thin
or
too
thick.
Needle
bent
and
strikes
needle
plate
because
work
is
pushed
or
pulled.
Bobbin
case
incorrectly
inserted.
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.
Push
needle
up
as
far
as
it
will
go,
its
flat
shank
side
facing
toward the
back.
Insert
system
130/705
H
needle.
Insert
new
needle.
Check
threading.
Select
needle
according
to
Needle
Chart.
See
par.
1
above.
Regulate
thread
tensions.
Use
only
good-quality
thread.
Insert
new
needle
and
push
it
up
as
far
as
it
will
go.
Insert
new
needle.
See
Needle
Chart.
Let
machine
feed
the
work
alone.
Only
guide
the
material
lightly.
When
inserting
the
bobbin
case,
push
it
in
as
far
as
it
will
go.
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.
… 56 …


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