Great Plains 1006NT Material Rate - Manual (Page 23)

Great Plains Mfg., Inc.
21
04/20/2007 150-287B
11. Weigh metered seed, and subtract the initial
weight of the container. Divide this number by 3
(number of cups metered). Finally, multiply by the
number of openers on the drill. This equals the
pounds per acre at this drive setting. Refer to the
formulas on the right.
Note: Refer to the drive setting chart on page 23,
the numbers listed are the number of revolu-
tions of the native grass meter shaft at a par-
ticular drive type and sprocket range.
12. To adjust this number, take the pounds per acre
divided by the shaft revolutions. This is the pounds
per shaft revolution.
13. Divide desired rate of pounds per acre by the
pounds per shaft revolution (this is the number
obtained from step 12). Find this number (or the
closest number to this) in the drive setting chart.
This will give the gearbox drive type and the range
sprocket size.
Refer to Figure 7
14. Set the Drive Type lever to the chart value.
15. Determine which sprocket is required for the native
grass box. The sprockets are stored on the right-
hand side of the drill frame.
To change sprockets, loosen the chain idlers.
Replace with desired sprocket.
Note: All native grass mixes will vary in weight,
seed type, and density, so this is why you
must calibrate each mix.
16. When drilling, check the amount of seed you are
using by noting the acres drilled, amount of seed
added to drill, and the level of seed in the box. If
you suspect you are drilling more or less seed
than desired, and you have accurately calibrated
the drill to you seed, you may need to change your
sprocket arrangement to compensate for your field
conditions.
MeasuredSeed EmptyContainer –
3
----------------------------------------------------------------------------------
PoundsPerSeedCup =
PoundsPerSeedCup NumberOfOpeners × PoundsPerAcre =
Figure 10
Select NG Driven Sprocket
20483
Figure 11
Set Native Grass Drive Type
20484
2
1
3