Singer 20U33 - Page 23

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
A.
TI-iREAD
TAKE-UP SPRING
TENSIO\
Tension
on
thread
take-up
spring
should
be
sufficient
to
ensure
action
at
top
speed~
but
still
light
enough
to
permit
itself
to
be
drawn
all
the
way
down
(as
take-up
lever
approaches
the
top
of
its
stroke)
before
any
thread
is
drawn
through
the
tension
discs.
NOTE:
The
tension
on
the
thread
take-up
spring
may
require
different
settings
depending
upon
the
size
of
thread
used.
--Heavier
thread
requires
more
tension
to
ensure
correct
thread
control.
SETTING:
1.
Thread
the
machine.
2.
Check
to
see
that
the
thread
take-up
spring
regulator
set
screw
is
tight.
3.
Make
certain
the
tension
regulating
thumb
nut
is
on
the
stud.
4.
To
adjust
tension,
insert
a
large
screwdriver
in
the
slot
of
the
tension
stud.
Turn
stud
to
the
left
to
decrease
tension
or
to
the
right
to
increase
tension.
Tighten
More
...
~~
~
\
Tensi
/j
JU\
-
,""--~~~~
E
I
I
F
U
Less
/
Fig.
27
Tension
Fig.
28
B.
THREAD
TAKE-UP SPRING HEIGHT
Thread
the
machine
and
turn
machine
pulley
toward
you.
When
take-up
lever
begins
to
rise,
the
thread
take-up
spring
should
make
a
slight
dip
(approx.
0.8
mm),
then
after
a
short
dwell,
return
to
its
original
position.
As
the
take-up
lever
approaches
the
top
of
its
stroke,
setting
the
stitch,
the
thread
take-up
spring
should
be
drawn
all
the
way
down.
As
the
take-up
lever
descends,
the
thread
take-up
spring
should
return
to
its
original
position.
The movement
of
the
thread
take-up
spring
may
require
to
be
increased
when
sewing
with
thread
that
stretches
or
when
sewing
wide
zigzag
stitches.
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