Trimble 750 boundary mapping

[chris4000]

Had my 750 about 18 months now,should I be boundary mapping every field,and does that speed the job up next time I go into a field that is boundary mapped
Chris

 

[e3120]

Depends what you're doing. Anything that needs much precision will be killed by drift unless on rtk.

On the other hand I've been marking boundaries and guidance lines for grass paddocks today, which will be fine for fert passes.

I'm doing the mapping with 13.5m left offset, which bodges the boundary out 24m and enables steering (ez pilot) on the 'first' headland pass. Also puts the AB line in the right place and doesn't upset coverage map/section control which are weakness of some of the other bodge methods.

 

[Andrew]

I tend to map and save every field I work in, but that’s contract grass mowing so I also map any obstacles so I don’t (hopefully) hit the same thing twice.
Also useful for true field sizes for billing.

Drift year to year on Rangepoint is negligible.

 

[chris4000]

Depends what you're doing. Anything that needs much precision will be killed by drift unless on rtk.

On the other hand I've been marking boundaries and guidance lines for grass paddocks today, which will be fine for fert passes.

I'm doing the mapping with 13.5m left offset, which bodges the boundary out 24m and enables steering (ez pilot) on the 'first' headland pass. Also puts the AB line in the right place and doesn't upset coverage map/section control which are weakness of some of the other bodge methods.

So if I do that can I save it ,and then when I spray thistles in our grass fields a few weeks later would I have my headland pass and ab lines there already ,just switch on coverage and go .

 

[chris4000]

I tend to map and save every field I work in, but that’s contract grass mowing so I also map any obstacles so I don’t (hopefully) hit the same thing twice.
Also useful for true field sizes for billing.

Drift year to year on Rangepoint is negligible.

Thanks Andrew,a lot of our fields I spray I just switch on coverage and go,if I need guidance I have to go all through the settings,takes me ages.

 

[Andrew]

Thanks Andrew,a lot of our fields I spray I just switch on coverage and go,if I need guidance I have to go all through the settings,takes me ages.

So yes, saving fields and reuising will help you

 

[e3120]

So if I do that can I save it ,and then when I spray thistles in our grass fields a few weeks later would I have my headland pass and ab lines there already ,just switch on coverage and go .

That's the theory, but i haven't visited mine on a different day yet. I'm only a few weeks in to the whole shebang.

 

[7800]

Depends what you're doing. Anything that needs much precision will be killed by drift unless on rtk.

On the other hand I've been marking boundaries and guidance lines for grass paddocks today, which will be fine for fert passes.

I'm doing the mapping with 13.5m left offset, which bodges the boundary out 24m and enables steering (ez pilot) on the 'first' headland pass. Also puts the AB line in the right place and doesn't upset coverage map/section control which are weakness of some of the other bodge methods.

I’m trying to work out why that wouldn’t be a 12m left offset ? Could you explain
I’ve been doing a third width and steering the second one round but like you say coverage is wrong and first tram wrong

 

[e3120]

I’m trying to work out why that wouldn’t be a 12m left offset ? Could you explain
I’ve been doing a third width and steering the second one round but like you say coverage is wrong and first tram wrong

The extra 1.5m is for the half width of the tractor from the antenna to crop edge.

 

[Chickcatcher]

The extra 1.5m is for the half width of the tractor from the antenna to crop edge.

So you are driving outside of the crop? 13.5Mtr got me thinking, perhaps "I" need to be outside of the box again. When you are doing this how far behind or not do you say the implement is?

 

[e3120]

So you are driving outside of the crop? 13.5Mtr got me thinking, perhaps "I" need to be outside of the box again. When you are doing this how far behind or not do you say the implement is?

I'm driving just inside the field boundary, on the crop (grass). No forward/rear offset for the mapping pass, as I want the fictitious boundary to mirror the field edge I'm following, just 24m outside it. Corners are not perfect, especially internal ones, but otherwise working fine. I'm just sowing fert so precision demands not as high as following a hedge with a boom.

24m of false boundary is useful as it can be used for any working width that it is a whole multiple of (3, 4, 6, 8, 12m) by choosing the right number of headland swaths. The AB will need shifted for anything other than 8 or 24m working widths, though. Otherwise a different false boundary for a specific width.

 

[Renaultman]

So if I do that can I save it ,and then when I spray thistles in our grass fields a few weeks later would I have my headland pass and ab lines there already ,just switch on coverage and go .

Yes. We save all our fields, it will also give you true cropped acreage.

 

[chris4000]

Yes. We save all our fields, it will also give you true cropped acreage.

How do I bring up a saved field onto the screen

 

[Slick]

How do I bring up a saved field onto the screen

Press the field tab,
then press 'select field by name'
select 'Client'
select 'Farm'
select 'Field'

 

[Chae1]

The field boundary will move every year though, depending on if ploughed to, or away from edge of field.

How do you account for this when drilling?

 

[chris4000]

Press the field tab,
then press 'select field by name'
select 'Client'
select 'Farm'
select 'Field'

Thanks Slick,will try that tomorrow