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

5. Changing
the
Bobbin
and Threading the
Bobbin
Case
Raise
the
needle
to
its
highest
position
and
open
the bed
slide.
With
the
thumb
of
your
right
hand
open
latch
B
(Fig.
6),
then
push
the
thumb
nail
under
the
projecting
flange
C of
the bobbin
case
cap and
lift
the
latter
out
of
the machine
with
thumb
and
fore
finger.
The
bobbin
is
now
exposed
in the
bobbin
case
base
and
can
be
taken
out easily.
R
9930
Fig.
6
Place
a full
bobbin
in
the bobbin case
cap
so
that
the
thread
draws
on
top
from
the
left
toward
the
right,
as
shown
in
Fig.
7.
Hold
the bobbin
steady
in
the
bobbin
case,
pull
the
thread
into
slot
X
and draw
it under
the
tension
spring
V. Leave
a loose
end
of
thread
about
7 cm
(abt.
3”) long
outside
the
bobbin
case.
Place
the
bobbin
case
with
the
bobbin
on
the center
stud
in
the
bobbin
case
base
and
close
latch
B (Fig.
6)
as well
as the
bed
slide.
R
9931
Fig.7
5

6.
Setecting
the
Correct
Need!e
To
ensure
a reliable
stitch formation,
make
sure
the
correct
needle
is
inserted
in
the
machine.
Needle
Systems
The
Pfaff
145
unison-feed
machine
in
Models
H
1
and
H
2
uses
System
134
needles,
while Model
H
3
uses
System
134-35,
and
Model
H
4
System
190
needles.
Needle
Point
Styles
These
needles are
available
with
different
type
points
to
suit
different
requirements.
The
various
needle
point
styles
are
identified
by
a
letter
following
the
needle
system,
e.g.
134
R.
Fabrics
are stitched
with
a
round-point
needle,
identified
by
14,
while for
leather
work
needles
are available
with
the
following
point
styles:
Lr
•
Narrow
reverse
twist
point
LI
4
Narrow twist
point
Lack
—
Patent
leather
point
p
•
Extra-narrow
wedge
point
PCr
Extra-narrow
wedge
point
with
right-twist
groove
PCI
Extra-narrow
wedge
point
with
left-twist
groove
S
I
Narrow
cross
point:
for
long,
straight
stitches.
D
.4
Triangular
point:
for
short,
straight
stitches.
Vr
0
Reverse
twist
spear
point
VI
Twist
spear
point
Rubberized
fabrics
and
plastic
materials
are
sewn
with
round-point
needles.
Needle and
Thread
Sizes
The
correct
needle
size
is
dependent
on
the
fabric and
thread
weights.
For
best
results,
select
the
needle
as
thin
as
possible,
but
make
sure
the
thread
can
be pulled
through
the
needle
eye easily.
The
needle
size
should
be
selected
to
match
not
only
the
thread
weight,
but
also
the
machine
model.
The
needle
size
is
indicated
on
the
shank
in
hundredths
of
millimeters.
Thus,
a
No. 100
needle
has
a shaft
diameter
of
100 /loo
=
1
mm.
6

Select
the
proper
needle
and
thread
sizes
from
the chart
below:
Model
Needle
Size Cotton
Silk
Synthetic
Linen
60
130/3 140/3
200/3—150/3
130/4
A
70
100/3 120/3
140/3—120/3
H1,H2
100/4
80
80/3
100/3
120/3—100/3
80/4
90
70/3—60/3
80/3
100/3—
80/3
70/3
70/4—60/4
B
100
50/3—40/3
70/3
70/3
60/3
H
1,
H
2,
H
3
50/4—40/4
110
30/3
60/3
60/3 50/3
30/4
30/6
120
24/3
50/3
50/3
40/3
24/6
130
20/3
40/3
40/3
35/3
140
12/3
30/3
30/3
30/3
H2,H3,H4
12/6
150
10/9
25/3
20/3
25/3
8/6
160
6/6 20/3
18/3
20/3
170
6-ply
fancy-
10/3
15/3
18/3
effect
thread
180
9-ply
fancy-
10/3
10/3
18/3
D
effect
thread
H
3,
H
4
190
9-ply
fancy-
0.6
mm dia.
18/4
effect
thread
200
12-ply
fancy-
1.0
mm
dia.
18/4
effect
thread
7

7.
Changing the
Needle
Raise the
needle
bar
to
its
highest
point,
loosen
needle set
screw
A
(Fig.
8)
half
a
turn,
and
pull
the
damaged needle
out
of
the
needle
clamp.
Insert
a
new
needle
into
the
clamp,
making
sure
that
its
short
groove
faces
toward
the
sewing
hook.
Push
the needle
up
as
far
as
it
will
go
and
tighten
needle
set
screw
A
securely.
Never
use
rusty
needles
8.
Threading
the
Needle
Pass
the
thread
from
the
spool
up
and
through
the
hole
in
the
thread
guide
of
the
thread
unwinder,
then
down
and
through
the
holes
in
stud
1
(Fig.
8)
and
thread
guide
2,
around
thread retainer
3,
clockwise
around
and
between
tension
discs
4,
under
thread
controller disc
5,
through
thread
check
spring
6,
up
and
through
thread
guide
7,
from
right
to left
through
the
hole
in
takeup
lever
8,
then
down
and
through thread
guides
7,
9,
and
10
and
from left
to
right
through the
eye
of
needle
11.
R9932
Fig.8
8
‘‘

9.
Drawing
Up
the
Bobbin
Thread
Hold the end
of the needle
thread and
turn the balance
wheel toward
you, as
indicated
by
an
arrow
in Fig. 1, until
the needle
moves down
and up
again.
As the needle
moves
up, it
catches
the bobbin
thread
which
comes
up with
it
through the needle
hole. Lay
both threads
back
under the presser
foot, place
the material
in the machine
and lower
the presser
foot. Hold
the ends
of both
threads
until
the machine
has made
a few
stitches.
10. Regulating
the
Thread Tensions
Adjusting the
Upper Tension
Turn tension
nut M (Fig.
8) clockwise
for more
tension, or
counter-clockwise
for less
tension.
If the upper
tension is
too
loose,
the bobbin
thread will
draw the needle
thread
down
so
that it
forms small
kinks on
the underside
of the material,
as shown
in
Fig. 9.
If the
upper tension
is too tight,
the bobbin
thread
will be pulled
up
(Fig. 10)
or
the
needle
thread will
break.
Both
tensions are correctly balanced,
if
the needle
and bobbin
threads interlock
in
the
center
of the material,
as
shown in Fig.
11.
Fig.
9
Fig.
10
Fig. 11
When
you raise the
presser
bar,
the upper
tension is
released automatically
so that
the
work
can be easily
removed
from the
machine.
To
do this, pull
the work
back (in
for
ward
feeding direction), never
forward
as this
may cause
bending
of the needle,
skipping
of
stitches
or
thread breaking.
Upper
tension
too loose
or lower
tension
too
tight
Upper
tension
too
tight
or
lower
tension
too loose
Both
tensions
properly
balanced
9