Pfaff 145 User manual

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1.
General
The
Pfatf
145
is
a special-purpose
sewing
machine
equipped
with
unison
feed,
smoothly
working
sleeve
take-up
and
vertical
rotary
hook,
which
sews
forward and
backward.
It
is
chiefly
used
for
sewing
multiple
plies where
it
is
important that
all
finish
out
evenly.
Its
permissible
top
speed
is
2,800
s.p.m.
When
sewing
tightly
woven
and heavily
dressed
materials,
the
sewing
speed
should
be
reduced
in
order
to
prevent overheating
of
the
needle.
The maximum
speeds
which
can
be
attained
with
machines
fitted
with
special
attach
ments
or
trimming
mechanisms
often
are
far
below
the
recommended
top
speeds
be
cause
the
nature
of
the
work
and
the
thickness
of
the
material
tend
to
limit
the
ma
chine’s
capacity.
If
the
maximum
speed
is
exceeded,
trouble
may
develop
chiefly
in
the
trimming
mechanism.
To
avoid
trouble
in
the
mechanism,
run
the
machine
at
about
70
per
cent
of its
top
speed
until
the
parts
which
are
in
movable
contact
have
become
thoroughly
glazed
by
their
action upon
each other.
This
should
normally
be
the
case
after
about
two
weeks’
constant
use.
All
machines
are
regularly
equipped
with
a
fixed
pulley
which
is
cast
in
one
with
the
balance
wheel.
If desired,
however,
they
can
be
supplied
with
a
disengageable
pulley.
If
fitted
with
the latter
type
pulley,
the machine
is
dispatched
with
the sewing
mechanism
disengaged.
To
engage
this
mechanism
for
sewing,
hold
the
balance
wheel
steady
with
your
left
hand
and
turn
the
large
lock
nut
clockwise.
2.
Fundamentals
of
Machine
Operation
Before
you
put
the
machine
in
operation
for
the
first
time,
carefully
remove
all
dust
which
has
accumulated
in
transit
and
oil
the
machine
thoroughly (see
Chapter
3).
Oil
the
machine
only
with
Pfaff
sewing
machine
oil
which
is
non-resinous
and
acid-free.
Never
run
a
threaded
machine
unless
you
have
fabric
under
the
presser
fodt.
Before
you
start
sewing,
lay
both
threads
back
under
the
presser
foot.
To
prevent
thread
jamming,
hold
both
thread
ends
until
the
machine
has made
a
few
stitches.
Do
not
pull
the
material
while
stitching;
the
machine
will
feed
the fabric
automatically.
Use
needles
of
the
correct
system
only
(see
Chapter
6).
Never
use
rusty
needles.
Use
high-quality
threads
only.
Always
bring
the take-up
lever
to
its
highest
point before
you
remove
the
material.

3.
Cleaning
and
Oiling
Careful
cleaning
and regu’ar
oiling
will
increase
the
service
life
of
your
machine.
After
you
have removed
the
dust
which
has
accumulated
on
the machine
in
transit, take
a clean
rag
and
remove
the
grease
from
all
nickel-plated
and
polished
parts.
Apply
a
few
drops
of
kerosene
to
all
oiling
points
marked
by
arrows
in
Figs.
1,
2
and
3,
raise
the presser,
foot,
unthread
the
needle
and remove
the
bobbin
case.
Twice
a
week
apply
‘a
few
drops
of
Pfaff
sewing
machine
oil No.
280-1-120122
to
all
points
of friction.
The
sewing
hook must
be
oiled
each
day
the
machine
is
in
operation
(see
arrow
and
oilhole
R
in Fig.
4).
Although
the
bevel
gears
are
enclosed
in
cases
and
require
no
special
maintenance,
it
is
recommended
to
replace
the
old
grease
by
Pfaff
grease
No.
280-1-120243
once
a
year.
Owing
to
the
special
lubricating
properties
of
this
grease,
the flanks
of
the
bevel
gear
teeth should be
greased
only
lightly.
R
9926
R
9925
___-
I
Fig.1
Fig.
2
2

From
time
to
time
remove the
needle
plate
after
taking
out
set
screws
1
and
2
(Fig.
4)
and
remove
the
lint
which
has
accumulated
underneath.
The
cleaning
of
the hook
is
dis
cussed
in
Chapter
13.
R
9927
I
Fig.
3
R
9928
Fig.
4
3

4.
Winding
the
Bobbin
Place
a
spool
of
thread
on
pin
1
(Fig.
5)
and
pass
the
thread
from
left
to
right
through
eyelet
2,
clockwise
around
and
between
tension discs
3
and
from
the
inside
through
the
slot
in
the bobbin.
Wind
a few
turns
of
thread
on
the
bobbin and
place
the
latter
on
spindle
4.
Start
the
bobbin winder
by
pressing
down
lever
5.
The bobbin
is wound
automatically
while
the machine
is
sewing.
When a
sufficient
amount
of
thread has
been
wound
on
the
bobbin,
a
latch
stops
the
bobbin
winder.
The
amount
of
thread
to
be
wound
on
the bobbin
is
regulated
by
screw
6.
Turn
this
screw
clockwise
for
more
thread,
or
counter-clockwise
for
less
thread.
If
the
thread
should
pile
up
at
one end
of
the
bobbin,
adjust
the
position
of
the
bobbin
winder
tension
sideways,
as
may
be
required.
To do
this,
loosen
screw
7,
adjust
the
tension
and
tighten
the
set
screw
again.
The
tension
on
the thread
is
regulated
by
turning
nut
6.
Make
sure
the
bobbin winder
pulley
rotates
in
the direction indicated
by
an
arrow
in
Fig.
5.
R9929
Fig.5
4