Pfaff 90 User Manual

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The bobbin thread
tension
has
been
set for
a
medium
grade
and
need
not
be
adjusted
for
all
ordinary
sewing
operations.
If
a
special
sewing
operation
should
require
a
looser
or
tighter
tension,
turn
the
small
knurled
screw
on
the
bobbin
case
with
the
tip
of
your
thumb
as
fol
lov,s:
Turn
it left
--E
—
for
looser
tension.
Turn
it
right
— for
tighter
tension,
Determine
whether
the
bobbin
thread
tension
is
set
for
0 medium
grade
by
holding
the thread
end
between
thumb
and
forefinger
and
letting
the
bobbin
case
hang
freely.
The
tension
should
be
strong
enough
to
keep
the
bobbin
case
from
being
pulled
down
by its
own
weight.
However,
as
you
jerk
your
hand
slightly,
the
bobbin
case
should
gradually
slide
down.
Do
not
turn
the
knurled
screw
too far
to
the
left
to
keep
it
from
falling
out.
Choose
the
lower
tension
slightly
stronger
when
doing
ornamental
stitching
to
be
sure
you
always
have
o
neod
satin
stitch
on
the
right
side
of thefobric.
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012
The
final
stitch
appearance
can
be
reguloted
by
the
upper
tension
knob,
as
follows:
Turn
left
—(C
—
for
looser
tension.
Turn
right
)?*m4
— for
tighter
tension.
The
marks
on
the
tension
housing
and
the
dot on
the
tension
knob
moke
it easy
to
restore
any
ten
sion setting
whenever
you
hove
hod
to change
the
f
tension
for
onother
sewing
job. (The
longer
the
[
mark,
the tighter
the
tension.)
The
upper
tension
has
a
third
disc
for
two-needle
work.
1.’
irr
F’
V
A
I
17

Pfaff 90 Specifications

General

Brand	Pfaff
Model	90
Category	Sewing Machine
Language	English