Ex. Of Headland Spread Patterns - Boqballe EX Manual

EX(W)
Trend
Examples of HEADLAND spread pattern, FROM BORDER.
The HEADLAND spreading system FROM BORDER, is developed for spread widths from
12 – 24 metres. In case spread widths larger than 24 metres are required – it will not be
suitable to use this system – the system TO BORDER must be used.
The HEADLAND spreading system FROM BORDER, is developed so that the PTO–
speed is reduced in comparison to the spread width.
•
The "power surplus" of the spreader means that the spread pattern overlaps the
tramlines closest to the tramline in which the spreading is made. This means that
fertiliser from 2
nd
reduced in 2
BORDER (See chart).
SPREAD WIDTH
[Metre]
12
metres
15-16
metres
18
metres
21
metres
24
metres
: 18
Spread width
: 250
NORMAL rate
: 250
HEADLAND rate
: 450
PTO speed
: 8,0
Forward speed
PTO 450 rpm.
HEADLAND- result:
•
Full quantity achieved appr.
0,5 meter into the field.
•
Approx. 0,5 meter is spread
outside border.
From the pattern it must be considered that the full quantity is not spread
absolutely out to the border but that the fertiliser quantity is increasing from
0% in border and up to 100% approx. 0,5 – 1 metre into the field. This depends
on how close the tractor is driven to the border.
The closer to the border – the closer the full rate to border.
nd
tramline will be thrown outside the border – unless the PTO speed is
tramline. The reduction corresponds to the PTO- speed FROM
PTO- speed
FROM BORDER
350
rpm.
400
rpm.
450
rpm.
450
rpm.
450
rpm.
metres
Kg/Ha
40
Kg/Ha
35
rpm.
Km/h
30
25
20
15
10
5
0
-6 -3 0 3
PTO- speed
nd
2 tramline
350
rpm.
400
rpm.
450
rpm.
450
rpm.
540
rpm.
HEADLAND, FROM BORDER
6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75
31
PTO- speed
Rest
540
rpm.
nd
2 tramline, reduced PTO.
G ødningsgræ nse
S um curve
S um kurve
1 st. T ram line
1. K ø respor
2 nd. T ram line
2. K ø respor
3 rd. T ram line
3. K ø respor
T ram lines
K ø respor