
Inclination
of
the feed dog
(The
standard inclination
of
the feed dog
is
obtained by adjusting the feed dog
so that
it
becomes horizontal when it rises above tha top surface
of
the throat
plate).
16,
ADJUSTING HEIGHT OFTHE NEEDLE BAR (Fig.17)
I)
Set the zigzag width to
"O".
Bring the needle to the
center
of
zigzag stroke;
2)
Remove the presser foot, throat plate, semicircle plate
and feed dog:
3)
Place the semicircle plate A on the plane, to which the
throat plate
is
to be attached,
of
the
bed.
Loosen the screw
CD,
and adjust so that a height difference
of
timing gauge l
is
provided between the lowest end
of
the needle bar and the top
·surface
of
the semicircle plate.
17, ADJUSTING THE NEEDLE TO HOOK
TIMING AND THE NEEDLE GUARD
(Fig.18,
19)
1) Positioning the hook: (!)After the completion
of
the
adjustment
of
the needle bar height, adjust the hook using
gauge 2 so that the blade point
of
the hook
is
aligned with the
center
of
the needle. ®Confirmation: maximize the zigzag
width, bring the needle to the leftmost position
of
the zigzag
strokeo Now, confirm that the top end
of
the needle eyelet
is
spaced 0.2-0.5mm away from the blade point
of
the hooko
2)
Adjusting the needle guard: (!)Maximize the zigzag
widtho Bend the needle guard to adjust so that the needle
does not come
in
contact with the blade point
of
the both at
the leftmost and rightmost positions
of
the zigzag
strokeo At this time, adjust the clearance provided
between the needle and the blade point
of
the hook
to
Oto 0.05
mmo
@The needle guard functions
to
keep the needle away from the blade point
of
the
hook, thereby preventing damage to the blade
point
of
the hooko Whenever you have replaced
the hook with a new one, be sure to adjust the
position
of
the needle guardo
r
+
18,
ADJUSTING THE AMOUNT OF OIL IN THE HOOK (Fig.20)
I ) Tilt machine head, and adjust the amount
of
oil in the hook by turning the adjusting screw
CD
mounted
on the hook driving shaft dear boxo Loosen the nut
®,
then tum the adjusting screw (D.
2)
After the adjustment, fix the adjusting screw by tightening the nut
®o
-8-
From the library of: Diamond Needle Corp