4.2 Adjustment of Machine
Stop
Position
After thread trimming iscompleted by
heeling
the pedal,the
sewing
machine
isbroughtto a stop with the
timing
mark
(B)
aligned
with
the
first
timing
mark
©.
The
sewing
machine
is
fully
factory-adjusted.
However,
if the
marks
are
misaligned
more
than 3
mm,
adjust the setting position of
light
shielding
disc
as
described
below.
[Preparation]
1. Disconnect
the
plug (12 pins) of cord, which comes
out
of the machine head, from
the
controller.
2. Remove
the
synchronizer
cover.
3. Operate the sewing machine and stop it
at
the
needle UP position. In this state, make
the
following
adjustment.
[Adjustment]
1. While
holding
the
light shielding disc by
hand,
turn
the
balance
wheel
to
match
the
timing
marks
(B)
and (C).
2. Perform
the
toe-down
and
heeling
operations
of
pedal several
times
to
check
if
the
stop
position
has
been
stabilized.
3. When
the
stop
position
has
been
stabilized,
connect
the
plug
(12
pins)
coming
out
of
the
machine
head.
Light
shielding
disc
Sencond
timing
mark
First
timing
mark
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