What could possibly go wrong :)

Hi All.
As you can see, i signed up here in 2016 with the intension of making a 2dof to move my diy race rig. Unfortunatley, life gets in the way and they make me go to work every day too so i struggle to get time, but then, dont we all.
Its only been 9 years so i figured i should get on with it, lol.

What i built some time ago was a steel tubed frame. It ran 3 screens, a standard g25 wheel, gears and pedals that must be 20 years old now. The h pattern gearbox finally wore out and failed and the wheel died just about a year ago. The pedals are still going , just. It all got alot of use and abuse over the years so fair play to logitech. Theres alot of real cars that dont last that long, lol.
A little while back i was here for info on a hoverboard dd wheel which now works and has been well tested. Im amazed how good it is really and wished i had made it ages ago. Well done to folks that unknowingly helped me there too.

So the reason for this thread... theres so much 'how to' on this site that its hard not to get stuff working if you look and read abit. But sometimes you just cant find what you are looking for and theres nothing in the search results, or at least, nothing that makes sense to me, lol. I thought i'd show what im doing/ making and ask my stupid questions here while im at it.

I was given 2 hefty wheelschair motors, i believe 300w, with thier gearbox's still on.
I plumped for the MDDS 30 Cytron driver, mainly for the cost.
I have a Keyestudio 'uno' r3, currently loaded with Blame73's modded software.
10k rotary pots
2 x 30 amp 24v psu's

I have a load of 40x20x2 steel box and 35years of experience of welding stuff together.
A friend with an mot garage handed me a propshaft with a UJ on the end that was going in his skip (probably from a Ford Transit)

Something like this is my plan... roughly
https://motionforsimulators.com/2dofs3dofmotionplatforms/

Then i'll mount my whole rig to the top and see what happens, lol.

What could possibly go wrong???

Here's the rig with the old g25 and minus the cables. Excuse the dodgy conservatory, Id' just move in. Its fabbed from steel tube and made with motion in mind so its very strong with no flex that you can tell. Without the seat and screens, it weighs very little and you can shift it on your own easily. But... it is big. It takes up the room of a single bed very easily.

Here's a few of the Hover board wheel.

The odrive in this pic died. I dont know why. It worked well for ages then just went all mad. I figured it was the odrive or the encoder so got new of each. I tried the Odesc v4.2 driver first and that has not gone bad yet so happy days.

So, onto the motion side. What could go wrong?
Well, firstly, the UJ didnt move far enough. I guess it didnt need much angle when driving the Transit but it touched its own 'arms' and locked quite quickly. I didnt have any other options at that time, so i cut the 'muvva' up I welded it to some box and plate and now it has a minimum of 45 degrees in all directions. Im sure i wont need that much and it will hit the motors at the moment, but i can sort that with some motor protection bars later.


Next issue, it became apparent that the rig would be far to high and would almost need a step to get in over the side rails of the frame so i had to lower the UJ height.


I settled on this...

It was at this point i couldnt help clamping the whole rig together. I marked the balance point and two of us lifted the rig on and clamped. One of the lads got in and i acted as the motors and moved him about.
"this will be f*%*^n' awsome" was his verdict, lol. For me, i felt it was quite easy to move, even from full dipped 'braking' back up to level. All good.

Wow, that's some quality work on that frame. Looks like you could throw an engine and axles on it; then take it to the dunes.

Next, i mounted both psu's and fixed the cytron to the ply on the rig. Then it was wireing time and also so me temp mounts for the pots. . The smc3 App was loaded and all my dodgy wireing was fixed, lol. I thought wireing it up was quite easy and it only took about half an hour (allthough it is only temporary wiring).
So far so good and i was only about 8hrs into it, but then i came to a halt.. This happened, lol.

https://www.xsimulator.net/community/threads/unable-to-extract-repo-zip.19199/

Since then, ive changed the old Uno to the rev3 copy, redone the smc3 app part and then still failed to get motion from the interface plugin test button/ slider.
The 500000 bits per second through me as apparently that is not a baud rate? I changed from 115200 to 5000000. Also i tried a few varieties of the Interface Output syntax and hey.... one motor worked with the slider, yay
To check the wireing hadnt fallen out for the 2nd motor, i reloaded the smc3 app and all was good as it should be. . I closed the app and checked it was closed and reopened simtools 3 and..... nothing. Not even the first motor worked without changeing anything so i got fed up and went home.

Heres the settings, does the syntax look right to make two motors move?

Cheers Thick8, yeah weve said the same thing. I do have an old Fireblade engine somewhere, lol.