Question Position of 4 actuactor for 3DOF?

Hi mate,
How about if i put the actuactor is like that?? ( same like hexapod 6dof) but my motion is 3dof 4 actuactor. The position of actuactor is not upside down, so the motor on the bottem, not like sfx 100. Is posible mate?? Because if i put upside down. That more heavy around 40kg of 4 actuactor. Ty.

The actuactor position need like this?? On the back 2 actuactor coming to one spot?? Not by corner.??

Looks reasonable. How fast do those actuators move?

The back actuators are pretty far forward, Make sure the balance is such that you cannot fall over backwards.

250mm/s mate with 150mm stroke. Okee mate. But it posible make 4 actuactor on the corner?? Or need like other image back actuactor need on one spot on the rig mate??

I think it makes more sense to have them on the corners that’s the classic SFX-100 and all the designs based on it.

There are two companys which offer an layout like this and when you look at videos, both of them look terrible. They want to combine acclerations and orientations but with to slow actuators.

You have to sit really high and have to slow down everything because of this. But as example, the rear actuators are mounted in an angle, the speed to get an only heave movement is slower(would it be 45°, it would be only half the speed). So normally you would need an 10mm Ballscrew and powerfull motors to get near an sfx or proper 6dof movement in accleration and speed(400mm/s).

And at the end you have only very few softwares you can use.

I like this layout, because it's possible to reduce actuators and still have movements like yaw/tractionloss, but in my opinion there is no software available to get proper and realistic movements.

Oke mate noted. One more question mate. If sfx100 body of actuactor is on the rig right, and arm on the botem ( with rod end or semilar). But if i make not upside down like i said. The rod end is on the rig, how about body actuactor?? Need to fixed on the botem or free motiowith u joint or semilar mate?? Still confiused mate. TY

No you don’t want Ujoints. For 6dof you have more constraints aka 6axis and need to use the ujoints. If you did that on a four axis rig it would just fall over.

So its mean, i need to make the motor and body of actuactor fixed on the base rigt?? Only the arm with rod end its thats right?

Yes. The Heim joints should take care of the pitch and roll issues. They may limit your roll but IMHO anything over 15 degrees seems excessive. You have a lot more than that on pitch.

I am designing a SFX-100 style system. I like the concept of having the motors not moving. On the other hand I like getting in and out of a low platform.

Do you have software that moves the motors?

Oke mate ty. I think i will used VNM mate.