(4) Adjusting
the
center knife pressure
0
X
1.
Adjusting
the
center knife right-left angle
§
X
The center knife 0 should be parallel
to,
and flush
with,
the
cutting edge
of
the
fixed knife
8.
(Adjustment)
Loosen
the
screw
@,and
turn
the center knife holder 9
right
or
left
to
adjust
the
parallelism
of
the
fixed
knife
@and
the
center knife
0.
Then
tighten
the
screw @.
2.
Adjusting
the
center knife pressure
*
If
the
knife pressure
is
greater than required,
the
knife
will
wear more quickly, and the knife
will
not
cut properly.
(Check
for
correct knife pressure)
1.
After
turning
off
the
power and
the
air supply, set a thread over
the
fixed knife
@.
2.
Turn
the
pulley
while
raising
the
link
ball
@)
by hand. When
the
center knife 0 descends and
crosses
with
the
fixed knife @, check
that
the
thread
is
cut.
3.
When
the
center knife 0
crosses
with
the
fixed knife @,the pulley should
not
get
stiff
and
the
center
knife
0 should move smoothly.
(Adjustment)
loosen
the
two
screws
e,s,,
and shift
the
knife bracket &
right
or
left.
When
the
center knife 0
crosses
with
the
fixed knife
8,
adjust
the
center knife 0
so
that
it
moves
smoothly and
the
pulley does
not
get
stiff.
Tighten
the
screws
e,s,.
-61-
From the library of: Superior Sewing Machine & Supply LLC
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