Inprogress 4dof Motion Rig

Over the last year I have gotten deeper and deeper into the motion sim world. A few years ago I started out with a Logitech steering wheel setup. Eventually made a janky wooden racing setup for some heightened immersion. Later I got my first Oculus and was beyond hooked. So, I started researching motion sims and was disappointed to see how expensive they are to buy prebuilt ones. About a week later a DIY motion sim actuator video showed up in my YouTube suggestions, which was well within budget. I watched that video dozens of times and still sometimes reference it when needed.

I have ended up designing my own actuators but they are strongly based off of several well known creators in the community. I am in America and wanted to be able to easily get replacement parts from local stores. I'd say I'm midway through my build, possibly farther, but finally have enough progress to start posting on here about it.

I will be posting my STL files and a parts list for everything I have ordered. I hope I can share some of my struggles and help others build their rigs.

It's been a long process and a lot of test prints before I got the actuators to a point that I really like them, but finally we have arrived. My designs closely resemble that of PeaceMaker's and SilentChill's actuators. Being in America and wanting to source parts locally, kind of forced me to redesign most of the actuator. The motors that I am using are the 80-ST servo motors coupled together with 600mm 2005 ballscrews. I opted for the 2005 ballscrews because I wanted a little bit more strength with only having 4 actuators. I hope these designs help. More build information to follow.

Blown apart view of what the inside of my actuator looks like

I am intrigued in your 4DOF design, as these actuators are designed to be used in a 6DOF?

These actuators are based off of designs for 6dof setups but I don't see why they cant be used for 4dof. My hope for the project is to be able to build a 0dof and add actuators and climb from 2dof to 4dof to 6dof as funds become available. It is a little tricky but playing with rig geometry will be key during each phase. I will have 3D models in the coming days to show what I mean.

you think 80st 750w servo motors with 2005 ballscrew is powerfull?how much will by kg one linear lifted? i have in plan follow you stl but for 6 dof .thx

From what I was reading from other builds, the 1605 ballscrews with 80st motors could lift roughly 350 lbs. I went with the 2005 because others said at the longer lengths they were having a slight bending issue. I am also going for a very unconventional rig design and wanted a little extra strength.

It is still a work in progress but more CAD and rig geometry to come this week

I've been leaning how to make constraints and now I am finalizing the dimensions for the base and geometry for the actuators. Here is a progress pic of the frame

hello any update

Not much physical progress has been made, but I have been learning a lot and doing smaller projects. Work should be slowing down in the next two weeks. So I should be able to weld the frame, the base, and machine the remaining components that I need for my actuators.

I did just complete a DIY hand break to install in the rig once its done haha.

I will be sure to post some pictures and videos in the coming month as I get the rig assembled for the first time. Stay tuned!

This is a very nice design. I'm looking forward to seeing it progress. If the rest of the build is the same quality as your handbrake, you're going to have a beautiful rig.

Good Morning,
Thanks a lot for your STL Files, I m create a 6Dof motion sim using 2010 ballscrews with 80st motors.
For the moment, I print some parts in 30% PETG using this settings in PrusaSlicer to add a structure every 20 slice:
https://opensfx.com/3d-printing/#settings
The first piece seams very stong