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Header
Spread Pattern
VERIFYING DRIVING CENTERS
Once optimum driving centers (effective swath width) have been established, conduct a
fi
nal “S” pass over
the trays to verify. Refer to Figure 9.
1. With both the spinners and
conveyor turned off, drive the
spreader through the center
of the course, establishing
an “AB” line. If the spreader
vehicle is a three-wheel type,
remove the center pan.
2. Line the vehicle up with either
end of the row of collection
trays, at a distance from the
“AB” line equal to the effective
swath width.
3. With both the spinner and
conveyor engaged, drive past
the trays.
4. Switch back and drive over the
center of the trays, down the
“AB” line.
5. Drive through the row of trays
and switch back once again,
driving past the trays on the
opposite side, at an equal
distance from the “AB” line as
the
fi
rst pass.
R20 R30 R40 R50 R60 R70 R80 R90 R100 R110
L20
L30
L40
L50
L60
L70
L80
L90
L100
L110
0
75’
(11.3m)
75’
(11.3m)
OPTIMUM DRIVING CENTER
(EFFECTIVE SWATH WIDTH)
OPTIMUM DRIVING CENTER
(EFFECTIVE SWATH WIDTH)
AB
AB
1
5
3
4
2
R120
L120
Figure 9
If the driving centers were determined correctly, all trays should have a similar amount of material, showing
a near
fl
at pro
fi
le in the test tubes. If the trays near the center of the row contain more material than the
others, increase driving centers. If the trays near the center of the row contain less material, decrease
driving centers.
NOTE: If spreading a blend of materials, verify blend of all products is consistent across all tubes.
