18
Seed Calibration
The calibration test should be done to confirm the required
seed rate and is done with the drill stationary and level.
Seed Calibration Procedures
1 Remove the calibration tray from the brackets on
the seedbox. Place the tray (or trays) on the support
members below the seeders.
2 Position all the clear plastic seed diverters to redirect
the seed into the calibration trays as in Fig 15/1.
3 Make sure all the shutters are open and set to the
position indicated in the seed charts for your particular
seed. Refer P16, Fig 9,10 & P17, Fig 13.
4 Agitator Shaft - Check the seed chart for hints on
whether to connect or disconnect this shaft during
seeding. Refer P16, Fig 9, 10 & Fig 16/1.
5 For the test, half fill the box with seed. If this is not
possible make sure the seed is evenly distributed within
the box.
6 Now the 3 basic settings must be made using the figures
from the Sowing Charts P 16, Fig 9, 10. For setting method
refer...
P 17.
Gearbox Setting Lever.
P 17.
Selecting the Gear Ratio.
P 17. Setting Seeder Shutter Slides.
P 17. Bottom Flap settings.
Note For seeds which are not covered in the Sowing
Chart, use the figures for a seed of comparable size and
shape.
7 Place the crank handle over the hexagonal drive dog on
the gearbox input shaft and turn clockwise until the seed
flows consistently from the seeders. To ensure complete
filling of the seed unit continue turning the crank until
the calibration tray is approximately half full then empty
into the seedbox. The drill is now ready for calibration.
Refer Fig 17.
8 Turn the crank handle the required number of
revolutions as in the table fig 19 on P 19.
Note The Calibration is usually done for 1/40th hectare.
For very small seed rates or when using inaccurate
scales (i.e. unable to measure to the nearest gram) the
calculation based on 1/10th hectare should be used.
Important - Before commencing sowing check that the
freewheeling hub positioned at the gearbox end of the
drill is set to 4 x 4, not 4 x 2 which is only for transport.
Refer Fig 18/1.
Scales must be accurate to 2 grams as any error
can be multiplied by up to 40 giving inaccurate
calibration results.
fig 15
fig 16
fig 17
fig 18
1
1
1
To Next Page
Loading...
