Pfaff synchromatic 1216 Owner's Manual - Page 15
Upper, tension, Lower, correct
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Upper tension (20) A = Setting mark. The normal tension setting is in the light-coloured range between 3 and 5, depending on the work. The higher the num ber, the tighter the tension. Lower tension B = Regulating screw. Turn it left for a looser tension, or right for a tighter tension. C = Correct thread tension. D = Upper tension too loose or lower tension too tight. E = Lower tension too loose or upper tension too tight. 4 The correct 'ower tension Let the bobbin case with a full bobbin hang down freely by the thread. It must not slTde down by its own weight, but should gradually move downwards wher you jerk your hand upwards lightly. Once the lower tension has been set cor rectly, adjust the upper tension only. 4 / \_\ 1 I 4 4 )
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Upper
tension
(20)
A
=
Setting
mark.
The
normal
tension
setting
is
in
the
light-coloured
range
between
3
and
5,
depending
on
the
work.
The
higher
the
num
ber,
the
tighter
the
tension.
Lower
tension
B
=
Regulating
screw.
Turn
it
left
for
a
looser
tension,
or
right
for
a
tighter
tension.
C
=
Correct
thread
tension.
D
=
Upper
tension
too
loose
or
lower
tension
too
tight.
E
=
Lower
tension
too
loose
or
upper
tension
too
tight.
4
4
The
correct
‘ower
tension
Let
the
bobbin
case
with
a
full
bobbin
hang
down
freely
by
the
thread.
It
must
not
slTde
down
by
its
own
weight,
but
should
gradually
move
downwards
wher
you
jerk
your
hand
upwards
lightly.
Once
the
lower
tension
has
been
set
cor
rectly,
adjust
the
upper
tension
only.
4
)
/
\_\
1
I
4