Konterror's 2 DOF Seatmover Project

As promised, the thread to my project.

I will update as soon as I have anything new, so that may take a while

I started with planning this rig out of mostly 40x40 aluminum profiles:

With the wheel- and pedaldeck like this it should give me plenty flexibility and at the same time should be really sturdy once everything is set.
The 80x40 profile in the back will hold my motors. The two in the middle will hold a cardan joint.
The distances between the back bar and cardan part is not set yet. I guess thats something I will figure out when I am putting things together.

This is what I thought to use as a frame for the seat:


Here I am not sure if I need it at all. I might just mount the seat and the cardan on a metal plate.
In that case I need to figure out how to mount the bars that go from the motors to the seat at shoulder height. The seat will propably be a sparco evo or some other not too expensive.

I can provide the .scene files i got out of maycad in case anyone is interested.

For the motors I wanted to use some motors and worm gears from motion control products first, but than decided to use wiper motors first, as kind of proof of concept. Once everything works and I figure out the wiper motors are not strong enough I will upgrade.

I am pretty sure I will use the JRK boards as motor controller.

As PSU I thought about a HP Server PSU. Has anyone experience with them? Do you need to modify them?(I am sorry if there already is a thread about it, I did not look for one yet)

General points for the Project:
I will try to stay under 2000€ which as far as I looked things up should be no problem.
roughly calculated so far:
600€ for the rig
300€ the seat
200€ the JRKs
60€ or somthing for the wiper motors
30€ PSU
I am missing the cardan (I need to ask for the price) and some smaller things, but I think budget wise it is realistic.

I do not really have a timefram, but it would be great to finish in the first half of the year.

In case you were able to get through my english and have any questions please ask. I will for sure have some more as planning goes on and building starts!

Ihr Englisch ist viel besser als mein Deutsch ! @konterror

Thank you for the link!
Yesterday, I bought all the electronics. I hope the parts will arrive early next week. I thought this was a good idea, so I can get things done.
Once the soldering is done, I can hopefully get the motors running with simtools and test a bit, without really moving anything.
I still have no cardan or anything for the pivot. Can anyone help me on this?
Whats best to use with no welding skills?

@konterror - I attempted to weld my UJ to a steel plate and it was just not playing ball.

I ended up just drilling two 10mm holes right through the middle and mounting to a piece of wood that will eventually be the base of my sim.


The bottom of the brackets are held on with "T nuts" for extra strength in the wood from underneath. (not screwed all the way in so you can see)

I strongly advise that you strengthen that....those bolts will snap on you and are not nearly enough to hold the proper weight especially when you add extra forces.

they will hold just fine, ive done that in the past, never failed on a full frame.
Mind you , give it a weld if you can

Im 240lb...that would slump over in a hurry for me. What size bolts? What grade?

Ok then. Weld it up if you can. Not everyone is over 240lb

Got another question about the pots to use with the jrks:
What resistance do they need? I could not really find anything in the jrk documentation.

I can't find a spec although I thought there was one. Anyway, if you use a linear 5-10kΩ potentiometer, you'll be fine. Alternatively you can also use hall sensor. Also check the FAQ.

Thx value1! That was exactly what I was looking for. I havent seen the pot faq yet, but that will help too!

I actually got something "done". With some help of my father (he is way better in electronic than I am) the electronics part is working. PSUs are modified, and wiring to and from the jrks is correct.

Here are the completed PSUs:

@Slider : Your tutorial is more than great, thank you very much! ( http://www.xsimulator.net/community...-server-power-supply-for-12v.5774/#post-60617 )

Here is a picture of the temorary build to try out the jrks and see if everything is working (and it does work):

@eaorobbie : Thank you as well. Your tutorial for setting up the JRKs awesome ( http://www.xsimulator.net/community/threads/playseat-to-2-dofseat.5401/page-2#post-56352 )

Here a really short video of the "function test". The pot is turned by hand as there is no mount for anything, yet.

Some more updates of the "building" process. It will soon be a lot more. Aluminum will be ordered over the weekend.
First I got the seat:

An updated version of my aluminum seat construction. This is probably the last update on this, since this is done with the seat as measurement.


One of the most important things I got an Cardan of ebay for 5€


and my father was able to make a flange joint out of it:


As before; in case someone is interested I can upload the CAD files as well.

ToDo's:
ordering aluminum
build a motor mount
get the "push rods"
get ball couplings or somthing of that sort
put everything together
make it look good

What kind of thing is good for the "push rods"?
I thought about an threaded rod in M10 or M12.
Or a 20mm x 5mm aluminum tube (ALMGSI0,5) to cut screw thread in M12 in them for fixing the coupling.
Will one or both of those suffice?

I ordered tha aluminum two weeks ago, and got it last friday. So I started building (once again with my father )

This is what it looked like in the beginning.

After some time we got the seat part finished:

And the pedale "deck":

After that I figured out they send me a little too few of the sliding nuts (or however you would call them) so we have 142 screws left but no nuts They just forgot to ship those, they will be here this week. At that time building can go on and there will be more pics.

Last but not least, a picture of the seat mounted on a wooden plate. That will be "married" with the aluminum part out of the second picture.


To put the ToDo list back in:
build a motor mount
motor levers
put everything together -> work in progress
make it look good

So some points are gone I added the motor levers.
Once the missing parts are deliverd and everything is put together I will build the motor mounts out of wood first as prototype to get the measurements and everything correct and have them made out of steel.

Nice progress. Good work!

Nice Seat Konterror, Sparco Just Oooooozes quality.

I received the missing parts yesterday, so the building went on:

Now it looks like this:




To put the ToDo list back in:
build a motor mount -> The wood model is for planned for today.
motor levers -> I will try to get this done today as well.
put everything together -> work in progress
make it look good