JUKI AMB-289, Engineer'S Manual

Page: 43 / 177

– 39 –
7) Origin compensation at bottom feed going up (Perform adjustment
after ensurng that the needle throwing motor origin and bottom feed
motor origin have been adjusted.)
1. Call up K55 in memory switch level 2.
2. Ensure that the distance between the throat plate and the bottom
side of the tongue stopper is 14 ± 0.5 mm. Refer to “(10) Adjust-
ment of tongue up/down cylinder”.
3. If the vertical position of the tongue stopper is correct, the param-
eter of K55 is –0.80, and the needle position is almost the same
as the tongue stopper position
C
.
If the difference between both positions is not acceptable, adjust
the parameter of K55.
4. Parameter change provides up to 5 mm adjustment in the front
and rear directions respectively.
8) Origin compensation of bottom feed stay button and flat sewing posi-
tion (Perform adjustment after ensuring that the needle throwing motor
origin and bottom feed motor origin have been adjusted.)
1. Remove air.
2. Adjust the small button gauge
incorporated in the button clamp
jaw lever.
3. Call up K56 in memory switch level 2. (Set the parameter to 0 at
that time.)
4. Loosen the setscrews and that tighten the feed plate for the
stay button.
5. Tighten the setscrews so that the needle is aligned with the
center of the hole penetrating the small button gauge in the
side-to-side direction with the feed plate for the stay button pushed
fully.
(Caution) You can usually remove the feed plate for the stay but-
ton without loosening the secrews that are used
for positioning.
6. Adjust the parameter of K56 so that the needle is aligned with
the center of the hole penetrating the small button gauge when
the pedal is depressed once to perform origin retrieval.
7. Parameter change provides up to 5 mm adjustment in the front
and rear directions respectively.
Adjustment Procedure Results of Improper Adjustment