25.
ADJUSTMENT
OF
THE
NEEDLE
THREAD
TRIMMER
p
HRJ
*
Attaching
the
trimmer
Loosen
setscrew
O.
and
adjust
the
height
of
trimmer
Set
the height
of
trimmer Q as low as possible, provided
that
it
does
not
touch
work
clamp
check
in
order
to
minimize
the
length
of
remaining
thread
on
the
needle
after
trimming.
* Closing
timing
of
the
needle
thread
trimmer
Adjust
the
closing
timing
of
the
needle
thread
trimmer
so
that
the
trimmer
completely
closes
when
it
advances
farthest.
To
perform
the
adjustment,
loosen screw
0>
and move needle
thread
trimmer
driving plate A 0
back
and forth. When the
needle
thread
trimmer
driving
plate
is moved
towards
you,
the
closing
timing
is
delayed
with
reduced
amount
of
closing.
(NOTE)
Confirm
that
an
allowance
of
0.3
to
0.5
mm
Is
left
between
the
blades
of
the
trimmer
when
the
trimmer
has
completely
closed.
if
there
is
no
such
allowance,
the
trimmer
would
Interfere
with
the
operation
of
the
needle
thread
trimmer
driving
plate,
preventing
smooth
movement
of
lifting lever 0 .
*
Opening
timing
of
the
needle
thread
trimmer
Adjust
the
timing
of
the
thread
trimmer
so
that
the
trimmer
begins
to
open
gradually
at a
distance
of
approx.
2.5
to
3mm
(3/32" to 1/8") from the start.
To
perform
the
adjustment,
loosen screw
O.
ai^d move needle
thread
trimmer
driving plate B 0
back
and forth. As it moves
towards
you,
the
trimmer
begins
to
open
earlier.
(NOTE): Take care
not
to
cause
the
already fixed needle
thread
trimmer
driving
plate
A
to
get
out
of
position.
26.
ADJUSTMENT
OF
NEEDLE
THREAD
TRIMMER
HOLDER
AND
LIMITING
PLATE
sMIM
0.5
mm
Loosen setscrew
O,
and install and adjust limiting plate 0 so
that
it comes in
contact
with
the
blocking arm 0 at
the
time
of
slow
start
of
the
machine
(when
latch B O is engaged
with
latch A
0).
Needle
thread
trimmer
holder 0 should be installed in
such
manner that it
engages
with cam 0 by 0.5mm (1/64") when
the
needle
thread
trimmer
opens.
27.
TIMING
FOR
DROPPING
THE
KNIFE
§.
Loosen screws
o,
and move knife tripping segment 0 in
the
direction
shown by
the
arrow, and
the
knife will drop earlier.
Adjust
it so
that
the
knife
drops
two
to
three
stitches
before
the
machine
stops.
A3
From the library of: Superior Sewing Machine & Supply LLC
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