The rotational speed of the cell wheel can be adjusted by
interchanging the gears (fig. 19) of the metering device. The
transmission Z=1 is the normal setting.
For the application of fine seeds and/or small quantities, the
setting Z=II should be used.
The output of transmission Z=II is slightly more than half the
quantity put out at the setting Z=I.
In order to obtain the output required, the cell wheel should
be opened further at the lower rotation speed. This ensures
more regular filling of cells for minor output rates and fine
seeds.
5.2.2
Compensation of slip of the metering wheel
A certain amount of slip was taken into account when
calculating the transmission ratio of the gears of the metering
wheel.
According to soil conditions, the effective slip may be
different.
A different amount of slip, if any, can be established as
follows.
- Set the hectare counter at 0.
- Drive a distance of:
333 m (POLYMAT 300)
250 m (POLYMAT 400)
If the slip is normal, the hectare counter will
indicate 00100.
If the hectare counter should indicate a different value, the
resulting difference in the effective output can be offset as
follows.
- Adjust the indicator higher or lower for the corresponding
percentage, reciprocal to the difference shown by the
hectare counter.
Example:
3% too low à set indicator at a 3% higher value
3% too high à set indicator at a 3% lower value
When carrying out a calibration test, turn the handle until the
hectare counter shows the different value, rather than the
normative 00100.
46
19
Z=
I
Z=II
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