Showroom Starting a 2DOF + traction loss...need advice

Im starting work on my 2dof + traction loss rig. My plan is to use these motors....12 volt gear motor 150 rpm / 25-1 ratio

I will use JRK boards and server power supplys. I will be doing a shoulder mount seat mover design. The entire rig will be a lot like Brett Horton's build on here.
https://www.xsimulator.net/community/threads/obutto-revolution-2dof-traction-loss.9224/

My initial questions are
1. Is it possible to still put the seat on adjustable rails or will this throw off center of gravity too much? I will be using a simexperience seat, u nless someone has a cheaper or better choice.


2. Is there a good premade enclosure for the JRK's or the power supplys or will I need to make one myself?

3. I am attaching a picture of my initial design with measurements. The left side of the drawing is the traction loss base. The right side of the picture is the main chassis. Red circles represent where the wheels will be mounted. Does anyone see any flaws in my initial plans?


Thanks in advance!

Planning on using this with a 3/4" shaft.

Here are some updated build pics....

I have a question on wiring the emergency stop button. I have looked over the FAQ and cant seem to wrap my brain around wiring for 3 psu's and 3 jrk's. Anyone have advice on best and cleanest way to wire the e stop?

I saw that and I know that is a solution but I can't figure out how he did it. I don't see a wire diagram or what parts he used.

its dead simple when u boil it down, PSU's have 2 wires that need to be joined to make them turn on the Rails of the PSU, I simply ran those 6 wires from the PSU's, UP to the Kill switch where i used 3 separate Normally Closed Kill switch Contact Blocks which are available on Ebay. Its not technically turning the PSU OFF, but its killing the power to the rail and in turn the JRK, You dont need to reset anything if you kill the power mid game, you just turn it back on and the motion comes back alive.

Links to the switch and blocks should be in my thread.... They are now at least.

Sometimes someone just needs to say something that makes everything click. When you said that about the 2 wires that make the psu come on it instantly clicked. I'm using a breakout board for my psu's. There is a jumper on the board for that very purpose. All I need to do is wire the jumper pins to the kill switch. Thanks guys. My brain was a little slow on this one.

Here are some pics of the electronics box. This is an Antec mini itx case. Im using 3 HP server psu's with breakout boards from ebay. The back plate is cut using my CNC plasma table. I will be mounting a fan in the top of the case to blow directly down on the JRK's.

How many degrees of movement should I expect with this setup? How much side to side and how much front to back? Thanks in advance.

More than is generally usable without completely throwing the profile and "realistic" movements out the window. fear not.

Trying to wrap my brain around the attachment of the levers. I've read the threads and seen the pictures. I understand on the lever side the nuts are welded to the lever on both sides. Are those nuts then also welded to the threaded rod? If not what keeps the rod from unthreading from the lever/nut assembly. In the pictures I've seen I can't see where the lever/nut assembly is welded to the threaded rod.

I see your concern from a technical side, but the fact i took 2 Big arse wrenches along with some red loctite on the threads and CRANKED those suckers as hard as i could. There is No way there coming out as proven by 4+ years of service with no issues on that front. Technically adding a Bead to the Nut and Rod would be wise, but not really needed.

Also a Tip, when tightening the Main Threaded rod in the motor shaft, Dont go all HULK on it, You can damage the shaft itself if you go crazy on tightening.

More pics....getting closer. Hope to be running in next couple of days.

So I've got the rig up and moving and have ran into a problem. The 1/2 motor shaft that the lever attaches to snapped in half after about an hour of running. It broke where I drilled through it to pin it. This happened on the traction loss motor. Kind of at a loss at what to do to prevent this from happening again.

better/higher grade threaded rod is the solution, tho makes drilling a bit harder. Did you have the hole perfectly centered ? I also opted to drill my own hole in the motor's axle shaft and use a smaller 5-40 bolt so there was more material for the threaded rod.

realize tho, Inertia is at play here. The heavier the load the more stress that lever/axle has to deal with.

Couple more questions....

1. when racing oval cars on a high banked track immersion is thrown off because the seat leans to the right, but the banking would make you lean to the left. Is there a way to setup a second iracing profile where the roll axis is reversed when racing on banked ovals?

2. I am trying to tune my pid settings. I read the laymans guide to it and there is a video on there of the jrk utility plots graph showing what the motors are doing in game. I cant get my graph to show anything in game. I can only get it to show me anything in the plots graph if I dont have sim tools running and i am manually moving the motors in the jrk utility.

@noorbeast
@Nick Moxley
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