5.2 Adjustment of the metering device
The POLYMAT is capable of seeding seeds with dimensions
ranging from 1 to 10 mm. For the application of fine seeds,
the metering device features a special adjustment.
Listed on the calibration chart are the outputs in kg/ha for a
number of seeds, related to the adjustment of the metering
device.
You will find this calibration chart by way of supplement E in
the back of this Operator’s Manual as well as in the shape of a
decal at the back of the POLYMAT’s hopper.
5.2.1
Seed output setting
The quantity of seed to be put out per hectare can be set by
means of the spindle A (fig. 17). With this spindle, the cell
width in the metering device is either enlarged or reduced.
Such values “S” as are listed in the calibration chart
correspond with the position of the indicator B on the
calibration scale.
If there are seeds in the hopper and/or cell wheel, the
indicator is only allowed to be adjusted to a smaller setting
when the cell wheel is turning. If not, the seeds within the
cell wheel may be compressed and damage may be caused to
the metering device.
Turn the metering wheel round or use the calibration handle
to make the cell wheel turn round.
- First, open the metering device by means of the spindle
well beyond the required output setting.
- Then close the metering device by means of the spindle
until the indicator of the calibrated scale has reached the
required output setting.
By adjusting the metering device consistently from the
open to the closed position, play in the mechanism, if any,
is not allowed to affect the settings.
For the application of fine seeds (rape etc.) the metering
device should be adjusted from position N to F, which
reduces the depth of the cells.
Proceed as follows:
- Empty the hopper.
- Turn the cell wheel round until all seeds are removed from
the cells. The cell wheel can be turned round by turning the
metering wheel.
- Set the indicator at 0.
- Switch the lock A (fig. 18) from position N to F. The lock
now has to mesh with the groove of the hexagonal shaft.
If the fine seed position was selected, the calibration scale of
the metering device is not allowed to be set at a position
higher than 25.
45
17
18
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A
B
A
N
F
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