Back with questions for 3dof build

Hey guys, it's been a while since I have been through here and it looks like the community is still going strong.

I finally ended up getting the basis of the rig going with a simvibe setup and it has been amazing do far. I have also gone deep with an accuforce wheel and will be looking at some nice pedals and shifter soon as well.

As for the motion side of things I have stayed off until now and am looking for suggestions and setup advice. Over Sunday and some drinks I decided to give sketchup a go and have come up with a fairly accurate representation of what the rig is now minus bolt holes and such.






Friends rocking the rig with a busted acl.


With a bit of an budget now and some time ahead (winter soon) I would like to take another look at a 3dof minimum rig with power to move some larger guests with force (250lb).

I had tried some things with the saber tooth 2x25 and kangaroo controller in the past and a big thanks to u/blazinH for the help with it but for the time and effort (time is the key here) I believe a pololu jrk setup will ease my headaches in this department.

I guess it's kind of hard to know where to start with the questions as they vary a lot but I'll give it a go.

On the physical side of things I believe a 4 motor setup will be the balance of power and price since 6motor seems to add quite the configuration change when looking at size and layout. I have a basic positioning of the motors in the screens which is a bit like u/bsft rig if not mistaken but would require linkage/supports not shown. Suggestions here are welcome in relation to the current rig shown above or convince me that 6 motors and a compact design is possible.

Along with the motor layout, from what I have read it seems that even on a supported 4motor rig one should still use a balance point gimbal to ease motor strain? Also the idea of spring tension is of interest and I was curious as the pros and cons on this.Elaborations in any form are welcome.

As for motors to use I have been very interested in motion dynamics as many of you here have used but being in canada and shipping costs I think and eBay/amazon option might be in order. I was thinking something in the 24v range at a hopefully 25:1 ratio for responsiveness although concessions can be made here.

I think I should leave it here for now as it's getting a bit long winded, although I have to say It's nice to be back and be digesting all the new builds people are putting together. Hope I can bring something to the table as well, with help of course

Thanks for the reply noorbeast your build is quite impressive and I like the idea of the spring assist or some form like that.

Those seem like decent units you showed on ebay, I was wondering if you know if there are sourceable replacement for the gearing if I want to change it later? I just wish motion dynamics had a cheaper way for me to get their 24v units without getting slagged with shipping.

I guess what I just learnt from watching your heave video and seeing other talk about it that depending on the motor you can change some of its characteristics though is lever CTC and the settings within xsimulator so that might give me some play without sourcing new gearing for fine tweaks.

Thanks again for the reply.