JUKI MF-7700D Series Engineer's Manual page 97

Adjustment Procedure
1. Adjusting the height of the spreader
To adjust the height of spreader
for adjustment.
2. Adjusting the longitudinal position of the spreader
Loosen spreader setscrew
of spreader .
3. Protruding amount of the spreader
Loosen setscrew
amount. Adjust aiming the adjustment figure of 5 mm.
4. Adjusting the spreader stroke
The standard position is located where the notch section of spreader
drive lever aligns with the shaft center of connecting pin
desired to increase the stroke, loosen lock nut
right direction. When desired to decrease the stroke, loosen lock
nut and move in the left direction. Adjust aiming the adjustment
figure of 18 mm.
, loosen spreader setscrew
to adjust the front and rear positions
in the spreader folder and adjust the protruding
Results of Improper Adjustment
o Height of the spreader is improper,
o Adjust the height in accordance
o Even when the protruding amount
o When the protruding amount is
o When the stroke is increased,
. When
and move in the
o When the stroke is decreased,
– 93 –
MF-7724DU10D60
stitch skipping of spreader occurs.
with the needle gauge.
is excessive or insufficient, stitch
skipping of spreader will be
caused.
insufficient, it will be the cause for
left needle not to scoop covering
thread at overlapped section.
disorder of covering thread
stitching will be caused.
stitch skipping of spreader will be
caused.