11.
ADJUSTMENT
OF
NEEDLE
UP
STOP
POSITION
(LU2-410-B1T,
LU2-430-B1T)
The needle UP
stop
position,
after
thread
trimming, should be adjusted depending on
the
thicknesses
and
materials
of
threads
and
fabrics.
For
adjustment,
proceed
as
follows;
[Adjusting Procedure]
Perform stitching
and
thread
trimming
on
a sample
and
check
deviation
between
the
white
point
on
the
balance wheel
and
the
black
point
on
the
arm
when
needle
UP
motion
stops.
1)
Advanced
needle
UP
stop
timing
2)
Delayed
needle
UP
stop
timing
•
When deviation
"A"
is more than 2 mm, thread
trimming knife fails
to
operate, resulting in trimming
failure of both needle and bobbin threads at left and right.
When
deviation
"B"
is
more
than
5
mm,
clearance
between
needle
edge
and
throat
plate
reduces.
3)
Adjustment
If deviations are present as shown above, adjust
the
light shielding disc portion of synchro
nizer until
the
specified dimensions
"A"
and
"B"
are obtained. For adjusting procedure, see
Section 3 "ADJUSTMENT OF NEEDLE BAR STOP POSITION" in page 5
of
the
Instruc
tion Manual. When making
the
adjustment, check
the
stop position through actual stitching
and
thread
trimming.
24
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
To Next Page
Loading...
Need help?
General
