horsch Maestro 16 SX, Operating Instructions Manual

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AirSpeed single grain metering system | 10
60026387 • 01 • 03/2021 • en 89
8 Metering disc mounting 11 Grain discharge point / transfer
point to barrel
9 Intake valve and seed depot 12 Mounting and transition of barrel
10 Separator 13 Metering disk sealing lip with
notch
14 Ejection wheel
Operating principle The generated overpressure presses the grains against the rotating metering disc
which transports them further.
The separator scrapes off the excess grains. There is one grain each in each hole of
the metering disc.
At the grain dispenser the grains are separated from the metering disc and released
into the Barrel.
The ejection wheel removes stuck grains, broken grains or foreign particles from the
holes of the metering disc.
Components
• Metering disc
Different metering discs are available, depending on the type of fruit and properties
of the seed (Thousand Seed Weight TSW), see also
Metering system settings table
AirSpeed.
The metering discs differ regarding the number of rows of holes and the number
and diameter of the holes.
• Grain feed gate
The filling level in the area of the grain pick-up is controlled with the grain feed
gate.
Depending on the position of the grain feed gate, different quantities enter the area
of grain pick-up.
• Position 6: maximum opening
• Position 0: closed, for emptying
If the seed quantity in the metering chamber is too low or too high, the grain pick-
up of the metering disc deteriorates.
In addition, if the seed quantity is too high, the function of the separator is com-
promised.
1. Settings, see Metering system settings table AirSpeed.
2. When performing the setting, start with the lower value as a tendency.
3. Avoid seed bridging.
In case of missed seeds, change the position of the slider, the hole size of the meter-
ing disc or theOverpressure level.