– 17 –
1. Adjusting the height of the spreader
2. Adjusting the longitudinal position of the spreader
Loosen setscrew
and adjust the height and longitudinal position
of the spreader
.
3. Protruding amount of the spreader
Loosen setscrew
in the spreader folder and adjust the protruding
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
. When
desired to increase the stroke, loosen lock nut
and move in the
downward direction. When desired to decrease the stroke, loosen
lock nut
and move in the upward direction. Adjust aiming the
adjustment figure of 17.5 mm.
5. Adjusting the timing between the needle bar and the spreader.
When changing the timing, loosen two setscrews
in spreader
eccentric cam
to adjust. Standard position is the position where
notch
in the main shaft aligns with notch
in spreader eccentric
cam. When changing, turn the upper pulley and change with spreader
eccentric cam
fixed.
o Height of the spreader is improper,
stitch skipping of spreader occurs.
o Adjust the height in accordance
with the needle gauge.
o Even when the protruding amount
is excessive or insufficient, stitch
skipping of spreader will be
caused.
o When the protruding amount is
insufficient, it will be the cause for
left needle not to scoop covering
thread at overlapped section.
o When the stroke is increased,
disorder of covering thread
stitching will be caused.
o When the stroke is decreased,
stitch skipping of spreader will be
caused.
o When the timing is excessively
advanced, needle does not take
covering thread when it comes
down and stitch skipping will be
caused.
o When the timing is excessively
retarded, resistance increases
when covering thread slips out
from the spreader and a load is
applied to the right needle. As a
result, needle breakage or stitch
skipping will be caused.
(Caution) W h e n c h a n g i n g ,
temporarily tighten No.
2 screw in the rotation
direction of setscrews
and turn the upper
pulley to change.
Adjustment Procedure
Results of Improper Adjustment
Downward
Upward
Summary of Contents for MF-7800D Series
Page 64: ...60 5 Adjusting the upper knife stroke A B Standard Adjustment H21...
Page 66: ...62 MEMO...
Page 80: ...76 3 Adjusting the elastic band presser plate 0 5mm Standard Adjustment E10 A A Approx 7 5 mm...
Page 84: ...80 MEMO...
Page 94: ...90 3 Setting of SC 510 2 Change of the setting Type B Type A Standard Adjustment UT25...
Page 114: ...110 MEMO...
Page 118: ...114 2 Installing SC 510 1 Wiring SC 510 Standard Adjustment UT22...
Page 124: ...120 MEMO...
Page 134: ...130 MEMO...
Page 142: ...138 7 Feed timing of the roller A Standard Adjustment PL11 C D B...
