Pneumatic 6DOF

[Zoszko]

Hey Fellow SimRacers,

I am working on a similar project like misterfarmer's except it's bigger. I am using 500mm reinforced cylinders with servo valves a flow controller for each of these valves.
I know it's gonna be huge, but I like the idea of it being huge.

I was looking at various builds here, but I could not find any data on how should I place the cylinder expect the fact that the group of cylinders are 120 degrees form each other and the top frame is rotated by 60 degrees.

How do I calculate the diameter of the mounting points and the distance between the platforms?

billo2404 have posted some pictures with actual dimensions on DoctorD's thread, but not actual formulas.

Please help!

~Zoszko

[misterfarmer]

Hello zoszko,

I could not find any information about sizes etc also. so i started watching images on google. After that i decided to make to excactly the same triangles.

after some testing things in sketchup, i decided to do it the most tricky way, so i started to make 6 excactly the same plates where the cilinders wil be connected. after that i mounted everything. so al the cylinders where connected. I was wondered because i could excactly make a triangle with it on the ground. so i thought when i measure the size between attachment points with cylinders in and make that the distance between the attachment points.

i don't know if it is excactly alright but it worked for me, everything is moving (except yaw is doing strange to one side).

Mayby it's the wrong choice i made but it will help you a little bit.

Greets

[misterfarmer]

Hi!

When considering my decisions I think I made a small mistake. I need to make the platform a little bit bigger. Because when the cylinder is in the middle.
The angle of the platform needs to be 60 degrees. I measured the length with the cylinder in. I think this will give the problems with the yaw on my platform.

I hope I can try this next weekend.

Greets

[Zoszko]

Well I have been working on this yeasterday and figured out the right dimensions. It's going to work, there is no collision.

In the mean time I have spent some time working on my code, however misterfarmer sent me his code (twice, thanks mate!), but I have made mine so I know my way around it.

Here's a short video where you can see the lenght of each cylinder:

[Zoszko]

Working now!

My friend is driving in rFactor here:

[misterfarmer]

it's very nice to see this working..