[Edu_Puixa]

Turn Radius only affects how small of a circle it will drive. Based on wheelbase, a certain degree will create x meters of radius. Counts per degree affect how much the wheels turn. It's A/D reading divided by counts per degree, so the higher the counts per degree the less it will turn the wheels per degree requested. So wheelbase and counts per degree affect turn radius, the min turn radius setting and max steer angle setting affect how sharp it can turn.



When you turn your steering wheel to about 45 degrees, does AOG show about 45 degrees actual?



The antenna doesn't move in the simulator, so it is above the pivot axle. In a tractor you can put the antenna farther ahead so it needs to calculate where the antenna is relative to the pivot (back) wheels. Everything is based off the non steering wheels

I will go to the farm on this weekend, then I will test all the suggestions.

But from what you wrote and playing with the simulator, I concluded following:

1. Turn radius sets the size for yellow uTurn shape drawn in AOG.
2. Wheelbase + max steer angle tells AOG what is max sharpness to turn (if uTurn shape is smaller, then AOG will steer up to max angle and go off the uTurn line. If uTurn is larger, than angle will be as needed).
3. Counts per degree relates WAS data to AOG angle and vice verse. And determines the actual wheel angle.

Am I right so far?


Yes, with around 30 counts, the actual wheel angle was around 45 degrees both in real life and AOG. Currently, I have 22 counts per degree - that's why in video max angle in AOG is about 60 degrees. Also, min turn radius is measured to the center of the rear axle (not inside or outside track), right?


If in simulator antenna always is above the pivot axle. Then what happens, if I set antenna distance same as in real life (above front axle). Cause if I do so in simulator (without changing anything else - only antenna). The behavior is exactly the same as I observe when driving in tractor - generated graphics, drawn area and going off-line to the outside in uTurn. For me, it looks like the centre of turn radius is shifted somewhere towards the front of the tractor.


A lot of questions, I know!
Trying to understand how it all works beneath the surface, not just plug-n-play.

 

[rayjorgensen]

I'm waiting for my GPS to arrive. Can the program be setup to run without so I can get the steering setup?

 

[BrianTee]

I'm waiting for my GPS to arrive. Can the program be setup to run without so I can get the steering setup?

You can make sure it works, like steers etc. But you need an actual GPS signal moving in the real world to set the settings

 

[Andreas Ortner]

######### Important #############

Forum has been moved to:

https://agopengps.discourse.group/

(its our own)

 

[DsDesert]

I'm still working on my agopen gps project and not finding much info for mounting a bracket to steering column to a JD 8110 .. if i could find a trimble ez steer bracket that fits , would the DIY motor fit ? As last resort would the ez steer trimble auto steer kit be compatible with the AOGps software ?

 

[m_elias]

I'm still working on my agopen gps project and not finding much info for mounting a bracket to steering column to a JD 8110 .. if i could find a trimble ez steer bracket that fits , would the DIY motor fit ? As last resort would the ez steer trimble auto steer kit be compatible with the AOGps software ?

I have used an Ezee steer motor with another DIY autosteer project that used a brushless motor driver and it worked quite well. It free wheels nicely and is quite quiet compared to other brushed DC motors. I see no reason it wouldn't with with AoG.

 

[DsDesert]

Ok good to know. I was aware of the claims that trimble is "colour blind" , so this must mean that they don't have any software or proprietary lockout mechanisms on the ezsteer.

QUOTE="m_elias, post: 3401480, member: 9929"]
I have used an Ezee steer motor with another DIY autosteer project that used a brushless motor driver and it worked quite well. It free wheels nicely and is quite quiet compared to other brushed DC motors. I see no reason it wouldn't with with AoG.
[/QUOTE]

 

[WW]

I have used trimble ezsteer with aog too but motor did not work on trimble when i was done with it. must of burned something out. I have made quite a few spring loaded 3d printed phidget motor mounts that work quite well with ezsteer brackets. Sometime i'll post pictures in https://agopengps.discourse.group/ or just ask for ideas on that forum

 

[torriem]

Ok good to know. I was aware of the claims that trimble is "colour blind" , so this must mean that they don't have any software or proprietary lockout mechanisms on the ezsteer.

When Trimble says they are color blind they simply mean they can steer any tractor. EZ-Steer doesn't interface with any tractor's computer bus or hydraulic system, although Trimble uses their own canbus to connect the monitor, EZ-Steer controller, and EZ-Steer steering wheel motor.

Trimble's own hardware is certainly proprietary and undocumented. I'm pretty sure the EZ-Steer motor uses a canbus protocol to communicate with its controller box. I'm just installing one on my swather now and hope to eventually do some sniffing on the canbus lines to figure out the protocol. I think it should be possible to use the EZ-Steer unmodified with AOG some day with an arduino-powered canbus interface. But in the end, a motor is just a motor. You can take it apart and bypass the built-in motor controller and use your own mosfet H bridge PWM driver that can be controlled from AOG like any other steering motor. An EZ-Steer is an expensive way of getting a motor, though.

On the discourse forum a lot of creative people have made their own steering wheel motors. Some use spring-loaded mechanisms, others use fancy 3-D printed gearing. Lots of potential!

 

[DsDesert]

Thanks @torriem , I was contemplating buying just the trimble bracket to simplify the fabrication process .. then add my custom motor and wheel.. ive only viewed images of a few examples - will check out discourse to see if there are step by step videos as this would be most helpful for a novice like myself !

 

[penny199666]

I have bought a similar system from sveaverken online store. It works great

 

[penny199666]

Does anyone know sth about RTK and Ntrip? This blog helps me a lot: RTK base station.