2DOF Simukit Seat Mover project by Choss

Hi guys and welcome to my 2DOF project.
Building (and finish) a motion sim for me is a major milestone in my simracing hobby. This "adventure" will also learn me more about electronics as my knowledge about it is limited. My goal at the end of this project is ofcourse a finished motion sim but more knowledge about electronics as well. My time is limited (wife, kid, work, study) but i will try to keep you guys updated on the progress.
So far my introduction. Now back to the project.

After studying a couple of project threads i contacted @Wanegain to get some information about his Simukit plans. After a nice chat via e-mail i decided to buy a kit from him which i received allready

Next step is to go to the hardware store and buy the necessary stuff to start building.
That's it for now.

Welcome !

I hope everything will be ok ... And if needed, don't hesitate

I built one too, it's working great so if you get stuck just ask

Welcome to the Simukit club @choss !
It's a great entry into motion simulators! I never would have attempted it if it wasn't for @Wanegain's great tutorial.

I am having so much fun with it!
In my thread, I mentioned the biggest improvement for me, was to have a brace welded on the bracket (45degrees) so there was no flexing of the bracket.

I look forward to the photos and video!

The Simukit club lol

I'm in too
Thanks to @Wanegain to create this club

I had a different take on it too, using two brackets on each motor also removed the flexing and didn't need a welder

This is a good solution too and you don't need to know how to weld

A little update on the progress:
Last monday i visited my grandfather and he was interested in this project and so i presented the plans.
I totally forgot that back in the days he worked with steel and knows how to weld and he came with all sort of ideas to get it done.
He also has the necessary tools and machines to drill conically and bend steel (can still bend steel with bare hands at age 87!).
At the end of the evening he said to leave all the stuff (i brought the motors and all other stuff with me) at his place so he can work things out.

He had one little question though about the cams.
In @Wanegain 's tutorial he said that the distance between the two holes is 3cm.
Is that the distance from center to center?

Right now i'm waiting for my grandfather to finish this (could take a while. he is a busy man).
In the meantime i can concentrate on the mdf.

Very good update indeed !!

The distance between the 2 holes is from center to center. You can increase this distance for more amplitude and it can be useful if you plan to use your motors on 150° (or less to have a simulator more reactive, and for a seat mover, it's very important) instead of 180° and keeping the same amplitude. The amplidute depends of course of many lengths you use and not only from lever.

On my simulator I use motors on 120° (for that you need others gears in order to not lose too many precision) and my lever are 4cm (between center of 2 holes )

Thanks @Wanegain !
Another question: My grandfather has some concerns about the "grippyness" of the cams when mounted on the motorshafts.
He thinks that when mounted on the shaft and fastened with one nut the cam will loose grip over time and will slip eventually.
He asked me to look after some sort of mounting specifically for these motors to make a more secure connection.
Before i look into this i want to know if the concerns of my grandfather are valid. I've seen a couple of video's of previous projects and it looks to me that the conically drilled cams are more than secure to do the job.

Can you guys give me some advice on this?

I know your concerns, but I found the softer metal of the cams, and the harder metal of the gear head created a natural 'bite' once the nut and washer are applied, that is has good grip. The teeth of the gear head creates it's own notches that hold well for my rig.

It's not the best practice, but it works and I never loose grip. If you find a better solution, use it.

Little update on the progress:
Yesterday my grandfather finished the brackets for the motors with welded braces and made the cams (with notches integrated!)
He called me to pick it up and i immediately noticed that he mounted the motors on the brackets the other way around (with the motors mounted on the "outside" of the brackets) and therefore the braces as well.
The result of this is that the cams can not rotate the fully 360 degrees with the cams touching the braces at some point.

For the motion of the seat it is not a problem because i don't need the 360 degrees, but i have some doubts what the motors will do when a hardware/software failure (pc, game, arduino, pots, etc) occurs.
Are there scenario's where the motors will keep turning when such a failure occurs? In other words will this be a big problem for now or in the future?

I will post some photo's this evening to make things clear.

You absolutely need to let the lever do 360° ! Because it will happen, maybe the first time you'll try...

Thanks @Wanegain .
I called the old man and he will fix it

The brace only needs to be on one side of the bracket, as the motor goes over the edge. It still works fine though.

i know @Leo Burton . Thanks. That's exactly what my grandfather did, but because he mounted the motors on the outside he placed the brace for the left motor on the right side and vice versa. Therefore it was impossible to mount the motors on the inside of the bracket. I visited him yesterday and we now go for the solution @Paul Shortland suggested.

Hi guys,

My grandfather finished the motor brackets and the cams!
Excellent work i must say