OPERATION
(ITI
safety
clutch
DEVICE:
Safety
clutch
device is installed to
prevent
the
hook
and
cog
belt
from
damage in case
the
thread
is
caught
into
the
hook
when
the
machine is
loaded
abnormally
during
oper
ation.
1)
FUNCTION
OF
SAFETY
CLUTCH.
1) When the safety clutch acts, the cog belt
pulley
will be
unloaded,
then
the
rotation
of
hook
shaft will
stop.
The
arm
shaft
only will
rotate.
Stop
the
operation
of
machine.
2) Clean the thread thoroughly which is caught
into
the
hook.
3) Turn the cog belt hub by hand, and check
whether
the
hook
shaft
rotates
lightly
and
properly,
place
the
clutch
device
as
follows.
2) HOW TO
SET
THE
SAFETY
CLUTCH.
1) While pressing
down
the
push
button
on
the
opposite
side
of
bed
by
left
hand,
turn
the
balance wheel slowly by right
hand
away
from
you
as
shown
in
the
figure.
2) The balance wheel will stop by the gear
plate,
but
turn
the
balance
wheel
more
firmly.
3) Release
the
push
button.
4) As shown in the Figure, the safety clutch
device
is
set.
3)
FORCE
APPLIED
TO
THE
SEFETY
CLUTCH.
1)
The
force
applied
to
the
safety
clutch is
the
smallest
when
the
white
mark
of
the
eccen
tric
pin
faces
the
center
of
the
lower
shaft.
The
force
proportionally
increases
as
the
white
mark
faces
the
outside.
2) To adjust
the
force, slide the timing belt,
loosen
the
set
screw,
and
turn
the
eccentric
pin.
3)
After
the
adjustment,
make
sure
to
fasten
the
set
screw.
-13-
Safety
clutch
belt
pulley
belt
hub
Balance
wheel
Push
button
Gear
plate
White
Mark
Timing
Belt
Eccentric
Pin
Strengthen
I-—
Screw
Weaken
Lower
Shaft
Eccentric
Pin
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
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