Pfaff 28 User Manual

In fig.
12,
the
needle
thread
tension
may be
too
loose
or
the
bobbin
thread
tension
too
tight.
The
operator
will
have to
decide
in
each
individual
case
whether
or not
either
tension
requires
adjustment,
particularly
so
the
thread
forms
small
krots
or
loops
on the
upDer
or
underside
of thc
material.
Fig.
11
Note:
The
neede
thread
tension
can
only
be adjusted
with
the
presser
bar
lowered,
as
raising
the
presser
bar
will automatically
release
thu
tension.
8. Regulating
the Pressure
on
the Material
According
to the
use
for which
they
are
intended,
the PFAFF
28
sewing
machines
are
fitted
either
with
a
roller
presssr
or with
a
presser
foot.
Proper
feeding
and
even
stitching
as
weil
as
preventing
injury
to
the
underside
of
the material
through
the teeth
oF the
feed
dog
depend
on
the
proper
adjustment
of
the
pressure
on
the material
exerted
by
the
ralier
presser
or
presser
foot.
Through
turning
adjusting
cap
screw
V
inwardly,
the
pressure
on
the
material
in
increased;
and
through
turning
it
outwardly
cEEC
, decreased
(see
photo
7).
For
stitching
delicate
leather,
it
is
absolutely
necessary
to adjust
the
pressure
on the
material
very
carefully
in accordance
with the
thckness
and
the
quality
of the
leather
to be
sewn.
9
Choosing
the
Proper
Needle
Far
obtaining
perfect
seams
in leather
work
with
PFAFF
28
machines,
it is
imperative
that
the proper
needle
sizes
be
chosen.
8
Fig.
12

Pfaff 28 Specifications

General

Brand	Pfaff
Model	28
Category	Sewing Machine
Language	English