5.8 Seed dosing
In the seed dosing unit (Fig. 62/1) the seed is
dosed by a dosing roller.
The dosing roller is driven by an electric motor
(full dosing).
The seed falls into the injector sluice (Fig. 62/2)
and is directed by the air flow to the distributor
head and then to the coulters.
Fig. 62
The dosing roller selection (Fig. 63/1) is depend-
ent on the
• Grain size
• Spread rate.
You can choose between dosing rollers with
various sizes of chambers or various volumes.
You must select a dosing roller volume that is not
too large but that is sufficient to spread the re-
quired quantity (kg/ha).
Use a calibration test to check whether the se-
lected dosing roller reaches the spread rate.
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