JUKI LH-4128-7 Engineer's Manual page 64

Engraved marker line
[Changeover to Needle Feed]
Procedures below are the reverse steps for changeover
to needle feed.
1. Loosen nut
from needle throwing rod fixing base
rocking rod arm
that time, let the engraved marker line of
with that of needle throwing adjusting screw
Replace the feed dog and the throat plate with needle
feed parts.
2. Under both conditions of needle stick and draw-out,
make adjustments so that the needle settles in the
center of feed dog needle hole. For adjustments,
loosen nut , shift needle throwing adjusting screw
in the direction of the arrow, and regularly tighten
nut .
3. Loosen the setscrew
the pulley by 180° so that engraved marker
lower shaft can coincide with the engraved marker
line . When coincidence is secured, tighten the
setscrew .
(Caution) 1. Move the setscrews, which have the
engraved marker lines
direction, to the screw holes located on
opposite side.
2. The recommendable adjusting value is
such that the top end of the needle hole
and the feed dog go down simultaneously
below the throat plate.
– 60 –
and move needle bar rocking rod
. Fix it temporarily with nut
of the sprocket
to needle bar
. At
coincide
.
, and turn
of the
in the same