JUKI LU-2800 Series, Engineer'S Manual

Page: 49 / 143

– 37 –
Adjustment procedures Results of Improper adjustment
o LU-2810-7, 2860-7
1. Set the stitch dial to the maximum.
2. Loosen clamping screw
❺ of the reverse feed arm.
3. Operate the reverse feed control lever to adjust so that the dis-
tance between the cylinder support ❸ and the cylinder knuckle
❹ is 8 ± 0.5 mm in the state that the bottom of elongated hole
of the reverse feed link
❶
is in contact with the hinge screw
❷
.
Then tighten clamping screw
❺
of reverse feed arm.
o
LU-2810-6, 2860-6, 2828-6
1. In a state in which the cylinder rod ❻ is retracted, attach the
feed adjusting link rod so that a clearance between the feed
adjusting link rod
❼
and the cylinder rod
❻
is 12 mm.
2. Set the stitch dial to the maximum.
3. Extend the cylinder rod
❻ up to the maximum.
At this time, the clearance between the feed adjusting link rod
❼ and the cylinder rod ❻ is about 52 mm.
4. Depress the reverse feed control lever, and tighten clamping
screw
❽
of the feed adjusting link arm.
(Caution) Before tightening clamping screw
❽
of the feed ad-
justing link arm, move the feed adjusting link rod ❼
in the vertical direction (in the direction of the arrow).
At a position where the load is not applied to the cyl-
inder rod
❻ , tighten clamping screw ❽ of the feed
adjusting link arm.
o Stitch lengths of the reverse feed
may not be obtained.
o
If cylinder rod ❻ is applied with
a load, the sewing machine can
malfunction and the life of the
cylinder can be shortened.