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A
Turn
OFF
the
power
before
starting
the
work
so
as
to
prevent
accidents
caused
by
abrupt
s
tart
of
the
sewing
machine.
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1
(1)
Adjust
the
timing
between
the
needle
and
the
book
as
follows:
I) Tum the handwheel to bright the needle bar down to the
lo
west point
of
its stroke, and loosen setscrew Q).
(Adjusting the needle
bar
height)
2) (For a DB needle) Align marker
line@on
needle barQ)with the bottom end
of
needle bar lower bushingQ),
then righten setscr
ewQ).
(For
a
DA
needle) Ali
gn
marker line
(gon
needle
barQ)with
the bottom
en
d
of
needle bar lower bushingQ),
then tighten setscrew Q).
(Adjusting position
of
the
hook
@)
3)
(For
a DB needle) Loosen the three hook setscrews,
tum
the handwheel and ali
gn
marker line
@on
ascending
needle bar
Q)with the bottom end
of
needle bar lower
bu
shing Q).
(For
a DA needle) Loosen the three hook setscrews,
tum
the handwheel and align marker line <J)on ascending
needle bar
Q)with
th
e bottom end
of
needle bar lower bushing Q).
4) After making the adjustments mentioned in the above step
s,
align hook blade point
<3)wi
th
the cent
er
of
needle
@ provide a clearance
of0.04mm
to O.lmm (reference value) between the needle and the hook, then securely
tighten setscrews in the hook.
(Caution)
If
the
clearance between
the
blade point
of
hook
and
the
needle is
smaller
than
the
specified value
the
blade
point
of
hook
will be
damaged.
If
the
clearance
is
larger
, stitch
skipping
will result.
-
22
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