Pfaff 28 User manual

PFAFF
28
Cylinder
Bed Right
Arm Sewing
Machine
with
Beak
Shutt%e
INSTRUCTION
BOOK
G.
M.
PFAFF
AG,
Sewing Machine
Factory,
KAISERSLAUTERN

FIGURE
8
FRiCTION
‘“LEVER
D
Page
11

Page
2
7
3
4
7
7
6
8
8
Section
Index
1, Dehvery
of the
Machine
2.
Engaging
and
Disengaging
the
Sewing
Mechanism
Bobbin
Case
3.
Threading
the Needle
4,
Winding the
Bobbin
5.
Changing
the Bobbin
and Threading
the
6.
Drawing
Up the
Bobbin
Thread
7. Regulating
the
Thread
Tensans
8. Regulating
the
Pressure
an the
Material
9. Ch.oosng
the
Proper Needle
10.
Inserting
the
Needle
11.
Regulating
the Length
of Stitch
12. The
Knee
Lever
Presser
Foot
Liftnr
13.
Taking
Out
the
Beak
Shuttle
14. Tilting
the Machine
Over
15,
Maintenance
of the
Machine
16. The
Treadle
Stand
17. Power
Drive
18. Cylinder
Bed Extensions
11
11
12
12
13
13
15
15
16
inside
back cover
19.
Probable
Causes
of Sewing
Troubles

Instruction Book
PFAFF
28
Cylinder Bed Right Arm
Sewing Machine
Fitted with
standard or
extra
large beak shuttle,
link
fake-up,
knee lever
presser
foot lifter,
reversible drop feed, wooden
extension
or iron screw-on work support for flat seaming oper
ations, provided for foot, individual
motor or power bench drive

1. Delivery of the Machine
Unless
shipped directly,
every sewing machine, when
received at our
dealers, is
unpacked, carefully checked for possible damage
inflicted in
transit, cleaned, and tested for perfect sewing before
being released For
delivery to the
customer.
2.
Engaging and Disengaging the Sewing
Mechanism
Two varieties
of the
PFAFF 28 are available:
1. with standard-size
beak shuttle;
2.
with extra large beak
shuttle.
Machines equipped
with standard-size beak shuttles have
abalance
wheel with
exchangeable pulley so as to permit easy conversion of the
machine
far foot or power
drive respectively.
The machines are
shipped with the sewing mechanism disengaged
so
that only the pulley
will rotate
when treadling
or starting the motor. To
engage
the sewing mechanism,
hold the balance wheel
with your
left hand
and turn the large
knurled lock nut R wth your right hand clockwise
in the
direction of the arrow (see
photo
il.
When lock nut
R is turned counter-clockwise,
the
sewing mechanism
is
disengaged
for winding the bobbin.
Ta increase
the piercing
power of the needle, the
machines with extra
large
beak
shuttles are fitted
with a
larger and heavier balance
wheel
with fixed
pulley
so
that
it
is nat
possible to
disengage the sewing
mechanism
of these
machines.
Photo 1
2

3.
ThreadIng the
Needle
As
shown
in
photo
2,
pass
the
thread
from spool
1
through
the
three
slotted
holes
of
thread
guide
2,
around and
between
the
tension
discs
3,
through
check
spring 4,
beneath
guide
5,
through
eyelet
6,
right-left
through
take-up
7,
through
eyelets
8
and 9,
needle
bar eyelet
10, and
then left-right
through
needle
eye
11.
Note:
As
with all
sewing
machines, the
needle
of the
PFAFF
28 is threaded
in
“long
groove—short
groove”
direction.
Photo
2
3

4. Winding
the Bobbin
All PEAFF 28
machines are
equipped with
a
table winder
which hos
proved
very useful
in all sewing
shops.
As
shown
in
photo
3,
place
spool
1
on
pin
2,
and the
empty bobbin
on
spindle 6. Pass
the thread from spool
1
through the
hole
3,
between
tenson
discs
4, over
pin 5,
and
through
the slot in the face
of the bobbin. By press
ng down
engaging
lever 7,
the bobbin
winder pulley
is pushed
over against
the
belt of the
machine and
the
winder
is engaged.
Now start
the machine.
When
the bobbin
is filled, the
throw-off lever
8
will
stop the bobbin
winder
automatically.
The empty bobbin
is taken out of the
machine,
the
full
bobbin
removed
from the
spindle
and
the thread torn
off. Then the full bobbin
is
inserted
in
the machine
and the empty bobbin
placed on
the
spindle for
rewinding.
This way,
a
considerable time
saving
is
effected
since a
full bobbin is at
hand at any time.
Also the operators
of machines with
disengageable balance
whel
will
profit
from
this ideal way
of winding the
bobbin,
I
Photo
3
4

5.
Changing
the
Bobbin
and Threading
the Bobbin
Case
Raise
the shuttle
race cop
by
slightly pushing
it up
with
thumb and
index
finger
of your left
hand
so that
it can be
slipped
over the
head of
screw
a
(see
photo 4),
then
let it
hong by
the hinge
screw.
Turn the
balance
wheel
until the
beak
shuttle
is
in
is
extreme
right-hand position.
The
b
ak
shuttle
can now
easily
be
opened
with
the
index finger
of
your
left
hand
as
shown
in photos
5
and 6,
and
the
bobbin
taken
out.
When
inserting
the
full bobbin,
care
must
be
token
that the
thread
is
pulled
from
below
into
slot b
as
shown
in
photo
7 so that
the
bobbin
will
Photo
4
turn
clockwise
when
the
thread
is
unreeled.
A
slight
pressure against
the
hinged shuttle
cap
will make
it
snap
into
position.
Then hold
the bobbin
and
draw
the bobbin
thread
down
somewhat
so that
it
slips
completely
under
the
tension
spring
and
comes
out
again
through
delivery
eye
c
(see
photo
8).
6.
Drawing
Up
the
Bobbin
Thread
1, Hold
the end
of the
needle
thread.
2.
Turn the
balance
wheel
slowly
until
the bobbin
thread
comes
up
in
a
loop
through
the
needle hole
(see photo
9).
Photo 5
5

3.
Lay both
threads
back under
the
presser
foot.
Basic
Role:
Stop the machine
or
commence
sewing
only
with
the
take.up
in
its
highest
position.
This precaution
will
keep
the
thread
from slipping
out
of
the
needle
eye and
will
prevent
jamming
of
the
thread
in
the
shuttle
roce.
In
this
case
it
is
not
necessary
to
hold
the
needle
and bobbin
threads
when
commencing
to
sew.
Photo 6
7.
Regulating
the
Thread
Tensions
To
obtain a
perfect
seam,
observe
the
following
points:
The
needle and
bobbin
threads
should be
locked
in
the
center
of the
moteriol
as
shown
in
figure 10.
Turning
the
tension
nut M
clockwise
,
will
increase
the
needle
thread
tension;
turning
it
counter-clockwise
,
will
decrease
the
ten
sion
(see
photo
2).
Photo
7
6

The bobbin
thread
tension
is regulated
by
means
oF
the
small
screw
driver.
Turning
tension
screw
d (see
photo
8)
clockwise
, will increase
the tension;
turning it
coueter-clockwise
-<
will
decrease
the
tension.
Since most
of the
stitching
work
done
on
the PFAFF
28
coIls
not
only
for perfect
but also
for strong
and
durable
seams,
the thread
tensions
must
be
regulated
very
coefully.
The
seam
must
show
tightly
drawn and
straight
sttchus
which are
locked
in the
cene
oF the thickn,ss
of he
ma ter
ia.
F;g.
10
It
is
absolutely
essential
to
use
top-quality
threads.
Never
use
cheap
threads
of inferior
quabty
which
might impair
the quality
of the
whole
work.
To
properly
regulate
the
thread
tens:ons
requres
some e;
per:ence
until one
can
tell
whether
the
needle
thread
tension is
too tght
cis
shown
in
fig.
11) or the
bobbin
thread tension too loose.
Photo
8
Photo
9
7