CLAMP
SCREW
§
AUXILIARY
THREAD
TAKE-UP
Fig. 29. Adjusting
the
Auxiliary Thread Take-Up
SET
SCREW
TENSION
RELEASER
SHAFT
12
Fig. 30. Adjusting
the
Tension
Releaser
SIDE
BOTTOM
RETAINER RETAINER
^ / X
SCREW
FOR
y I
SCREW
FOR
SIDE
RETAINER
BOTTOM
RETAINER
Fig.
31. Adjusting
the
Looper-Threod
Retainers
AUXILIARY
THREAD
TAKE-UP
The auxiliary thread take-up
aids
in setting the
stitch
by taking up slack needle
thread,as
needle bar
finishes
its
downward
stroke
and
starts
to
set
the
stitch.
To adjust, loosen clamp screw shown in Fig. 29 and
raise
or lower auxiliary thread take-up
as
required.
Then
securely tighten clamp-
screw.
Adjustment may
vary with changes of thread or materials in use.
THREAD
TENSION
RELEASER
Tension
releaser
must
release
tension
on
needle
thread and looper thread when
presser
foot is
raised
but
should not
release
tension
(even slightly) when
presser
foot
is
down.
To
adjust
the
tension
releaser,
loosen
set
screw
shown in Fig. 30 and turn
shaft
until
correct
adjustment
is
obtained.
Then
tighten
set
screw.
LOOPER-THREAD
RETAINERS
1.
Thread
retainer
on bottom
of
looper,
shown
in
Fig.
31,
should
produce
a
tension
of 10 to 15
grams
on # 80
white
cotton
thread
To adjust, loosen retainer screw on heel of looper
and
move bottom
retainer
against
bottom
surface
of
looper,
as
required. Make certain side-edges of re
tainer do not protrude beyond
sides
of looper. Securely
tighten
retainer screw.
2. Thread retainer on side of looper (facing operator,
as
shown in
Fig.
31), should
produce
a
tension
of
20 to 30 grams, on # 80 white cotton thread.
To
adjust,
loosen
retainer
screw
at
lower
end
of
looper and move
retainer
against
side
of looper
as
re
quired.
Securely
tighten
retainer
screw.
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