Great Plains NTA2007 Material Rate - Manual (Page 4)

2 Great Plains Manufacturing, Inc. Contents Appendix VRG Air Drills
167-085B Contents Appendix 2012-01-03
Setting Meter Rate
Check Flute Shaft Configuration
Refer to Figure 2
(which depicts a single flute “star” with its halves, a single star
mated, two stars staggered, and a filler)
Know your “stars” (dosing roller) setup. If your air cart
has never been changed from factory standard, you have
meter flute shafts with two deep-flute “stars”
(4 halves)
per outlet. How many “stars” you have determines which
rate seed rate chart to use.
Refer to Figure 3 (depicting an inspection from below meter)
If the configuration is not known, inspect the flute shaft
from the hopper lid (if hopper empty), or from below the
meter, with the calibration door fully open. It is not
necessary to remove the shaft. Inspect the flutes
, and
filler rings at active outlets.
On a standard “2 star” shaft, each seed drop outlet
contains two flute sets (4 halves), each pair staggered
slightly from the next. Unused outlets are fully blocked by
filler rings
.
On an optional “3 star” shaft, each outlet contains 3 flute
sets of the deep style
.
On an optional “4 star” shaft, each outlet contains 4 flute
sets of the deep style
, with no fillers between adjacent
drops.
On an optional Small Seeds shaft, each outlet contains
one set of narrow, shallow flutes
.
Find Your Chart and Rate
Standard “2 star” rates begin on page 13. “3 star”,
“4 star” and Small Seeds rates are in the Appendix,
starting on page 38.
If you are planning to apply two different materials (such
as seed and fertilizer) in each hopper, perform the setup
steps separately for each hopper, as the configurations
(including stars) may be completely different.
1. Confirm that the chart is for the material and star
configuration you have.
2. Find your target population or application rate.
Note: If you have a choice of charts, for most consistent
results, pick one that results in a variable rate
gearbox value between 30 and 70.
Figure 2
Flute Stars and Filler
32400
1
3
2
1
1
3
Figure 3
Checking Flute Shafts
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4 1 3 4
1
1
2