JUKI LU-2800 Series, Engineer'S Manual

Page: 41 / 143

– 29 –
Adjustment procedures Results of Improper adjustment
o Except for LU-2828-6, 2828-7
1. Set the stitch dial to “6”.
2. Loosen two setscrews
❶ of the feed adjusting eccentric pin.
3. Turn feed adjusting eccentric pin ❷ to adjust the stitch length.
o
Direction A → Reverse feed length is increased.
o
Direction B → Normal feed length is increased.
4. After the adjustment, securely tighten two setscrews
❶
of the
feed adjusting eccentric pin.
(Standard) When the direction of notched part of the feed
adjusting eccentric pin ❷ is set to just above as
shown in the illustration, the feed amounts of nor-
mal and reverse feeds are nearly the same.
o
In case of LU-2828-6, 2828-7
1. Set the stitch dial to “6”.
2. Loosen three setscrews
❸ from rear side of the machine arm,
and remove the cylinder unit ❹ .
3. Loosen setscrew
❺
of the feed adjusting base support shaft.
4. Turn the feed adjusting base support shaft
❻
to adjust the
stitch length.
o
Direction C → Reverse feed pitch is increased.
o
Direction D → Normal feed pitch is increased.
5. After the adjustment, securely tighten setscrew ❺ of the feed
adjusting base support shaft.
6. Return the cylinder unit
❹
to its original position, and securely
tighten three setscrews ❸ .
(Caution) When assembling the motor cover, be careful not to
pinch the code and the tube.
* When performing "2.-(21) 2P feed adjustment", perform forward/
reverse stitch length adjustment of standard feed after performing
forward/reverse stitch length adjustment of 2P feed.
o Respective stitch lengths of
normal and reverse feeds do not
match.