Showroom 2DOF 200w Motion Dynamics Motors & IBT-2

Hi all. Thought I would add to the collection.
Have always wanted to build a motion sim - want to thank the community and especially Dave/D Max for his very extensive videos on youtube.

Using the 200w Motion Dynamics motors, 2x IBT-2 H-Bridge and 2x eBay 24v 42a 1000w power supplies.

I started off with a cheap frame and 55" tv, Logitech G27

Upgraded to Moza R9, TCLM pedals and TH8A shifter before doing my platform (for centre of gravity).

We first strenghted the frame (not adjustable any more)

Also added some square tube stiched onto the steering wheel plate as it was only thin metal (can't really see in this picture, only the welds)

Got position of shifter etc set, made a mount for button box
Made the bottom frame


Braced the back more


Painted and got the electronics setup


Started the heim joints off in the furthest hole but the IBT-2 kept shutting off, moved in 1 hole and it improved a lot but still happening.
Ended up drilling 1 more hole, IBT-2 doesn't shutdown unless you crash really hard.

With the triple monitors setup


Also some extra pics of motor mount and how I attached the potentiometer


I also have a Dayton BST-1 under the seat and 2x small aliexpress bass speakers on the brake and accelerator, and wind sim


Even though the setup is working fine, I think I may need to use a 1:2 ratio for the potentiometer to give it more range

I have learnt a lot, and will need to at some stage extend the bottom frame, extend where the heim joints attach to the cockpit so that they are at shoulder level and move the driveshaft forward to get back to 40 degree angle.
At that point I will probably get different motors as the worm gear in these gearboxes have quite a lot of play when motors are reversing etc.

I will organise to get a video soon.

Cheers - Matt

3D printed a gear on both the motor shaft and potentiometer. Ended up with a 2.5 ratio.


I also got 2x cheap dampeners from Ebay and mounted them, this has made a massive difference. There's no more play/rocking when using sway effects from the worm gear.

Great job,
Do you have a link to the dampers?

Not sure if the link will work, if not just ebay for "motorcycle damper"
https://www.ebay.com.au/itm/165983116046

I'm going to be changing to the 60:1 gearboxes soon and also upgrading to a sabertooth 2x32

Some updates, got the bottom frame adjusted (220mm) so the arms are now at a 25 degree angle (was around 10 degrees before the adjustment). Left the mounting point to the top frame around mid-back height. Didn't really solve anything with the IBT-2 issues that I had (hitting some sort of safety).

Before doing the gearboxes I thought I would try the 2x32 Sabertooth first. Surely enough no more IBT-2 drops.
Just need to make a cover with 3 140mm fans as the PSU fans were stupidly loud. I have the fans ready to go, using a small 5a dc to dc step-down module to power them (using 12v fans, PSUs are 24v).
Also changed to the 180 degree hall effect sensors now (6127V1A180L.5FS) which means I don't need to run any extra gear ratios/gears for the pots any more. Just directly mounted to the bolt/hex shape on the motor shaft via a 3D print.

Should have done the sabertooth from the start, the 2x32 is a beast.
The Sabertooth and PSUs don't even get warm to touch.
Wiring is not getting any temp into it either (I have added some polyester wrap around some wiring due to cable crossovers as a just in case).
The motors are getting slighty warm as I believe they are well and truely overdriven now.
I am catious of the worm drive gears (plastic) with harsh reversals but I have toned down SMC3 settings until I get the dampers on again.



Next thing I need to do is to get a bolt tig-welded to the stainless threads for the dampers to mount on to as the u-bolt I was running keeps spinning.