GPS mowing

[James.gamble]

Hi all I have a case puma with rtx want to set the mower up on the gps but can’t seem to get the offset right it’s a 2.8m Kuhn mounted mower

 

[BRB John]

What have you got the offset at? 1.4m?

 

[James.gamble]

Haven’t tried setting it up yet our case dealer said don’t bother with an offset just run it at 2.8m

 

[BRB John]

It should come to the same thing.
Offset more for if you had a front mower or plough that sort of thing.

 

[Optimus]

For the offset measure from the centre of the top link to the centre of the bed( not where the mower pivots.

 

[James.gamble]

So is the offset half the width of the implement? I’ve never had to use a offset before so it’s blown my mind a bit

 

[del_boy]

So is the offset half the width of the implement? I’ve never had to use a offset before so it’s blown my mind a bit

The offset will be wherever the halfway point is on your cutting width and from this point to the centre of the dome.
So if your mower is 2.8 it's going to be roughly a 1.4m offset. But I doubt you'll be mowing exactly 2.8m each pass. More like 2.7m perhaps or even less possibly so the offset figure won't be exactly 1.4m something like 1.3/1.35m perhaps. It takes alot of trial and error and will drive you bonkers bur will be brilliant when you do get it right. Good luck

 

[Wombat]

Offset will be more than half your cutting width as you need from the centre line of the tractor to the inner edge of the mower adding to half the cutting width. Easiest way is to get a tape and measure from middle of tractor to middle of mower.

tractor should be setup to centre the gps receiver to the middle of the tractor anyway so you shouldn’t need to account for that.

if it’s the same as your working width then it won’t matter if you add it or not. If not then if you work in breaks then you will probably end up missing bits when you take them out

 

[KB6930]

First off take a tape measure and see what you're mower is actually cutting as in when when you go round the field the first time .

I'm cutting with greenstar and the offset is basically the cutting width to the right or if you're not using an offset it'll just colour in where the tractor is so you'll get abut not coloured in when finishing a break off

 

[ColinV6]

This is something I’ll be looking into myself soon, running a front and rear mower, I already did a measurement of a break and it’s around 19ft or 5.7 metres.

Will the offset be around half of that width? As the front mower also sits to the left of the tractor as it’s wider. It’s all a bit confusing. One of the advantages of triples is at least it’s a centred unit.

 

[KB6930]

This is something I’ll be looking into myself soon, running a front and rear mower, I already did a measurement of a break and it’s around 19ft or 5.7 metres.

Will the offset be around half of that width? As the front mower also sits to the left of the tractor as it’s wider. It’s all a bit confusing. One of the advantages of triples is at least it’s a centred unit.

I think it'll be quarter of it

 

[dannewhouse]

If your tractor is 2.2 m wide you need to add 1.1m to take the signal to the edge.
If your mower is 2.8m you then need to add a further 1.4 to get to the centre of the mower bed.

So your offset will be 2.5 on these numbers.
I would advice adjusting working width down from the 2.8 of the mower maybe try 2.7 or 2.6 reduce it if you have misses increase if you think you are overlapping excessive.

 

[e3120]

As said, offset for a single rear mower will be approx the cutting width, or a touch less. It's always the distance from the centre of the tractor to the centre of the work. So for 3m front and backs expect about 1.5m.

The dealer who said don't bother must expect you to cut it all one way, as it's when you come back on yourself that it's important.

You have to get it right in stages. Matching up passes in the same direction is governed by the working width. Get this right first. Then fiddle with the offset to get passes in opposite directions to match.

 

[michael N123]

I just set a A-B line and use that to put my breaks in and it’s normally bang on

 

[James.gamble]

Thanks all I will try it when I next mow some off if the weather ever gives us a break

 

[ColinV6]

Thanks all I will try it when I next mow some off if the weather ever gives us a break

Or be like me and cut 150 acre on Friday only for it to rain both days since

 

[puppet]

For a single mower is it easier to follow GPS or the line of uncut grass?

 

[James.gamble]

ColinV6 I mowed 25 acres for hay I was told think it will be wrapped

 

[ColinV6]

For a single mower is it easier to follow GPS or the line of uncut grass?

Gps for sure, if it was a single front mower it’s really easy but a rear your looking over your shoulder seeing a huge overlap most of the time.

 

[puppet]

Gps for sure, if it was a single front mower it’s really easy but a rear your looking over your shoulder seeing a huge overlap most of the time.

I get that following a screen may feel comfortable. We have a 9 foot mower set up with the front wheel along the cut edge so spend most time looking forwards with the mirrors to check no lumps. If there is a huge overlap then the mower is not set up properly. I would aim for a few centimetres to account for undulations.
Maybe I'm just a dinosaur.