Much better gain would be lowering antenna to hood, how much lower is antenna there is less error to correct. But there can some improvement lower it is there is less sideways movement.
Good test is antenna on hood and IMU lowest point that you can reasonably install with IMU module that is stand alone from PCB you can try many places and heights.
There are 5 modes that BNO can have and there this https://xdevs.com/doc/CEVA/BNO080-BNO085-Sesnor-Calibration-Procedure.pdf
Unless you have cab suspension, IMU location does not matter. Front, back, roof, floor, console the math is the same.
Somewhere close to level with the rear axle, inline with direction of travel, securely mounted and weatherproof.
https://youtube.com/shorts/nCGYNJqIUek?feature=share
The GPS receiver is in the nose. The box appears in the video. bno08+ In its own mini aluminum case. in the middle of the back hanger. I put it right next to the box. at a point without a magnetic field. Suitable for your suggestions. In this case, I’ve already done the correct positioning that I need to do. The only one I haven’t tried is the minimal filter experience. Let me try again by reducing the filter of the sensor to minimum 20 band. fewer filters
I just noticed in your pictures you are measuring the outside tire of the turn.
The Steering angle that seems to work the best is the inside turn angle, the outside wheel travels a bigger circle so it does not turn in as far. Guessing this will add another 10 degrees to the 30. I call the angle magic because this was my last big fix before U turn worked properly.
I know all the letters are flipped, but the picture is top down, not quite as good a draftsman as you awesome linkage drawings!
And if you have cab suspension?
For cab suspension.
I solved Belarus tractor like this
Induction senskr resets encoder in motor on 0
But having encoder on steereng wheel i have 2-3 degrees non moving wheels when i move steereng wheel left right.
So it always goes left right becouse of it , its tiny but it goes, and it’s unusable for speeds greather then 8km/h.
What is max usable speed with was mounted?
We are making now sensor with changeble induction , to try to make sensor with no friction to be long lasting.
Encoder on steering motor for AOG ?
Thats brushless motor.
Why and how do you use encoder for AgOpenGPS ?
WAS is just a sensor for wheels position it can work at any speed. Main limiting factor is you tractor if you have 3 deg of no movement of wheels autosteer cant do fine adjustments as you go faster your steering wheel needs to be turned less to get same effect as low speed. AOG only moves steering wheel few degrees back and forth when you are on the line.
2 solutions are fix empty movement or go for hydraulic system and bypass steering wheel problems entirely.
Empty movement cant be fixed.Its in hydraulics.
I buy now orbitrol, new hydraulic piston, new pipes, new pump .
But it still has some small empty movement.
I tried on brand new john deere , armatrac,kubota, mccormick , etc… all of them have small empty movement.
Dont tell me brand new tractor 150.000 eur is not ok.
I whant to know is AG open gps capable doing speeds od example 15km/h?
I do not expect precission od 1cm at that speed but 2-3-4 max
Tried to find videos but all of them are working 6-7km/h
Found videos of cerea doing on 17km/h
Then we don’t have same view on “small” If you have same movement as new john deer then that’s not a problem.
https://www.youtube.com/shorts/5MJvg-gVfOQ
high speed from @Tooki57
My primary problem is failing steering hydraulic pump when tractor is cold it works good but when it heats up you need 2 hands to pull steering wheel under 1000rpm. So I started from 30 pwm and ended up at 140 for low setting I think that with new pump AOG will work good.
Does anyone have situation that tractor standing sthill but map moves?
Some times ab line is not straight , when i make it , the a spot sometimes is moved left or right for 1-2 meter
Then i realised i need to drive 15-20 meters to map stops rotating and then i pres A spot , then no erorr.
What is moving map when tractor stand in place?
Imu, gps …?
Did you set SIM cords to your place?
Your gps is actually not getting same position every time it calculate a position.
My AOG say I move around 0,1 km/h when standing still, this could trigger AOG to shift between forward and reverse.
So set The MIN speed (in single antenna settings) higher than the standing still speed.
If you set Roll filter very high, roll take forever to stop rotating.
Or you have set gps receiver to only 1 HZ instead og 10 HZ
Did you install the rover file?
I don’t get it, what sim coords do?
If you do not set them to same as your gps tell, then start of field could be at Brian in Canada.
That sure slow AOG down.
Do N O T use a field In real life that is created in simulator where sim coords standard is set to Canada
(UNLESS off course if sim coordinates in simulator is set to your place)
Sim coordinates are used to view saved fields indoors with no active gps signal connected, or for bench testing.
I wish when opening a saved field it would auto enter the coordinates into the sim.
I thought it did
It definitely saves a single coordinate change, on the main screen.
I will check to see if putting new sim coordinates in, while each different field is open saves and inputs that coordinate on re opening.
If it does I will be delighted.
I was struggling with getting settings right with steering configuration. Rtk signal and steering motor was pulsing or running in bursts. After 3 days came across this post of same problems. Checked my u Blox configuration and @Aortner load that I did this winter came in at 1 hertz instead of 10 hertz like others discussed. Changed this morning and night and day difference now. How amazing @BrianTee_Admin , @PotatoFarmer , @Vili , @Larsvest @KentStuff @m_elias @Radmuffins @m_elias @whiterose of work you all have done. This steering and variable rate control is amazing and it’s completely Lego version! Built ourselves! Thank you all very much for so much support and knowledge! It’s precise under half inch at 7 mph right now and u-turning beautifully! Thanks again
