19
Pt. No. 67439
Issue 1120
‘Enviro DD35’ Calibration
Wheel Slip Deviations
It is always possible with rubber tyred drills in extreme ground conditions to get wheel slip. Not
normally a problem with cleated type tyres in good condition, but more so in the arable situation
with the less agressive tread patterns. The result: large differences between the calibration test
and the actual sowing rate, obviously less seed deposited than required.
To check number of crank turns for calibration
Should you require to check this in a practical way proceed as follows:
For an area of 250m
2
(1/40 Hectare), the travel distance for your machine is metres.
Place the crank handle over the hexagonal drive dog on the gearbox.
Move the machine forward over the measured distance, counting the number of turns of the
crank handle as you go.
Using this number of crank turns repeat the calibration.
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