Pfaff hobby 4240 User Manual

Trouble
shooting
Problem:
1.
The
machine
skips
stitches.
The
needle
ist
not
inserted
properly.
The
wrong
needle
is
inserted.
The
needle
is
bent or
blunt.
The
machine
ist
not
correctly
theaded.
The
needle
is
too
fine
for
the
thread.
2.
The
needle
thread
breaks
Due
to
the
above
reasons.
When
the
thread
tension
is
too
tight.
When
the
thread
quality
is
poor
or
slubbed.
or
when
the
thread
has
become
too
dry
due
to
being
in
storage
too
long.
When
the
thread
is
too
thick.
3.
The
needle
breaks
The
needle
is
not
inserted
as
far
as
possible.
The
needle
is
bent.
The
needle
is
too
thin
or
too
thick.
The
needle
is
bent
due
to
the
fabric
being
pulled
causing
it
to
hit
the
needle
plate.
Only
guide
the
workpiece
lightly.
The
bobbin
case
is
not
inserted
correctly.
4.
The
seam
is
not
regular
The
tension
is
poorly
adjusted.
The
thread
is
too
thick, slubbed
or
hard.
The
bobbin
thread
is
wound
unevenly.
Thread
loops
above
or
below
the
stitch.
5.
The
machine
does
not
feed
or
feeds
unevenly
Lint
has
collected
between
the
teeth
of
the
feed
dog.
6.
The
machine
does
not
run
easily.
There
are
pieces
of
excess
thread
in
the
hook
race.
Important
notes:
Solution:
Push
the
needle
up
as
far
as
it
will
go.
With the
flat
side
facing
the
rear.
Insert
needle
system
130/705
H.
Insert a
new
needle.
Check
the
correct
threading
of
the
machine.
Insert a
thicker
needle.
See
above.
Adjust
the
thread
tension.
Only
use
high
quality
thread.
Insert a
needle
with a
large
eye
(system
130
N).
Insert
the
new
needle
as
far
as
it
will go.
Insert
a
new
needle.
Observe
the
needle
chart
(page
59,
60).
Allow
the
machine
to
feed
the
material
alone.
When
inserting
the
bobbin
case,
push
it
into
place
as
far
as
possible.
Check
the
needle
and
bobbin
thread
tensions.
Only
use
perfect
thread.
Do
not
wind
the
bobbin
without
allowing
the
thread
to
run
through
the
bobbin
winder
tension.
Thread
the
machine
properly.
Check
the
needle
and
bobbin
thread
tensions.
Remove
the
needle
plate
and
remove
the
lint
with
the
brush.
Remove
the
unwanted
threads
and
place
one
drop
of
oil
in
the
hook.
Before
changing
the
presser
foot or
needle,
the
on/off
switch
must
be
switched
off.
The
machine
must
not
be
operated
without
a
workpiece
when
threaded.
Always
switch
off
the
on/off
switch
when
leaving
the
machine
unattended,
even
for
short
periods.
This
is
particularly
important
when
children
are
in
the
vicinity.
64

Pfaff hobby 4240 Specifications

General

Brand	Pfaff
Model	hobby 4240
Category	Sewing Machine
Language	English