Showroom DIY 2DOF simulator

Thank you,verygood is post.

Hello,

I would like to ask for some clarification on some general things related to building motion platforms. I wasn't sure where to ask but I will be building a miniature 2DOF simulator for my first project, so I guess this will work.

I have some questions related to the mechanical construction of motion platforms, mainly connecting various components together.

I will post three 2DOF motion platforms, where each have a varying motor position and rod connection. All these platforms are from the talented people of this community.

As you can see in all 3 images, I am puzzled as to how the motor position is chosen in motion platforms. You can see that image 1 has the motors positioned a little forward with the U-joint behind, image 2 has the motors positioned all the way back, and image 3 has them positioned quite far away and the rods don't even connect vertically. However, these are all working systems. How do you decide on this?

For one, I am assuming the u-joint has to be right below the center of gravity, or at least below the player? And further on, how do you decide on how to connect the rods, so that they will be able to rotate the platform to every possible extent (as required by the simulation). How do you also choose what type of rods to use to make sure that they do not break under pressure and use?

I am foreign to all these concepts and this is my first ever question to this community. I hope to be able to build many cool simulators with the help and support of all of you. Can't wait to share my own work!

Thanks.

Thank you for the links, very informative! I'm looking forward to trying out SimCal, as my main project is quite a complex design. I wanted to build a miniature 2DOF initially just to get started. So, regarding the bolting position of the rods, the u-joint FAQ page says the following:

"You also need to balance the rig to determine where it bolts to the seat base".

I understand that this is doable for miniature designs, or perhaps even actual one-person simulator designs, but let's say a larger design like the following, how can you figure out the center of gravity?? I believe this is a couple of hundred kilograms and not something you can easily figure out with a round pipe.

Is it safe to assume simply the geometrical center as center of gravity and then install powerful motors to keep the structure from breaking under load?

Hey there;

I´m actually thinking about the best way to connect the shaft with the "lever" to move our upper element.
Do you have any hints for shaft-to-collar connection ? So far its planned like you can see in the pictures. The only missing part is the connection between motor and the rest.

We also have an own thread, go visit us there if u want to stay updated! cya

59684
thanks for your help guys

very good

Thanks for sharing your project, very useful information, and I'm impressed about the craftsmanship.
What u-joint are you using, from a car driveshaft or steering column? The size looks perfect.

I used a toyota 4x4 rear driveline

https://www.ebay.fr/itm/CARDAN-53-7...ORCE-TRAVAUX-FORESTIER-530-750mm/370554552923

Thanks @Tech2123 and @Erwan960, I will take a look at your suggestions.

hi, do you choose a 2dof cause it's enough for what you do or cause make a 3 or 4 dof is very complicate ?

Very nice and inspiring project! How did you solve cooling fins for your JRK?

What was the price of the project?

Congratulations on your editing, it's really beautiful. Is the engine temperature high during a game? Do you know the life of your motors? (number of hours played before changing them)

How is the rotating part you made fixed with the shaft of the motor?

What machinery, equipment or tools need to be used to achieve it? Can it be done by hand?

Also, is the output shaft of your motor unilateral or bilateral?

How is the connection between the potentiometer and the motor shaft? I saw the coupling, but I don't know how the coupling is fixed to the motor shaft.

It's a keyed shaft.

These parts were laser cut.

not reversible thanks to the 50: 1 or 60: 1 reduction gear

I drilled in the center of the output shaft and I fixed a threaded rod inside, 6mm in diameter, on which I put the flexible coupling.