Question Some questions regarding 1DOF in VR

Hello all! As evidenced by my name, I am new to this forum, as well as motion simulators in general.

I've been enamored with the idea of motion simulators since I've first seen the DOFreality H3 in independent youtube reviews. However, I currently cannot afford to utilize such equipment due to space constraints in my current living situation. This has led me down the rabbit-hole of DIY motion simulators and this wonderful forum.

Some background about me: I only race - and sometimes drift - in Assetto Corsa using VR on my computer desk. I currently have issues taming oversteer in both race and drift scenarios and have concluded that I will benefit from a rear traction loss simulator. I am sure additional motion axes would be beneficial and enjoyable, but I am intent on keeping this build simple for the following reasons: financial, space constraints, being a motion-sim noob, and enjoyment (I believe I would obtain the most "smiles-per-mile" from RTL than any other type of motion simulator).

I weigh under 70kg and have no plans of sharing my rig with anyone else. I plan on building a simple, lightweight rig from wood, with a metal wheelstand. I likely will use a lawnchair as a seat, to keep the weight down. I estimate the rotating portion of the rig will weigh less than 20kg, including the weight of my peripherals and motor/actuator, etc.

My main objectives for motor, or actuator selection is:
-Quietness
-Responsive
-Easily-repairable
-Inexpensive is good, too.

I have considered utilizing a single SCN5 actuator, like simXperience's rear traction loss add-on - which, by the way, has been the catalyst for this project.
The noise of the SCN5, has turned my attention to DC worm drive motors. I understand noise-reducing enclosures may help, but I am hesitant due to the possibility of being unhappy with the result after spending a significant amount of money that could have been used elsewhere.

After some brief research, I have concluded that a DC worm gear motor with 25:1 gearing will allow me to achieve my goal. Since I'm still a beginner, I have some questions regarding their application for RTL in VR:

1) How do I achieve a responsive setup, so that I may feel the rear stepping out instantaneously? Do I require a faster linear-speed, or should I shorten the CTC lever for more force?

2) I understand that less motion is much more beneficial in VR, but if I were required to utilize a longer CTC lever, would I be able to limit the range of motion in SimTools?

3) I have been comparing the PGsaw and Motion Dynamics 25:1 motors and have noticed that they are 180W and 200W, respectively. Could the wattage difference be felt during simulation?

4) I have read about the inherent backlash in worm drive motors and am wondering whether it will affect the sensation of traction loss. Is this a valid concern? If so, could I use two bungee cords to keep the backlash minimally noticeable?

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For the rest of the traction loss system, I will use a furniture-sized lazy-susan bearing as the pivot, and some rubber-wheeled casters - placed in the rear and middle of the platform - for minimal noise production. I am also considering utilizing PTFE plastic as a surface for the casters to roll on, in order to reduce the amount of friction for improved responsiveness.

I will use a JRK, due to their simplicity. I have not considered the power supply, but am willing to take some recommendations. I'd like it to be inexpensive and quiet, as well. Reliability is also important - I'd like to avoid a fire.


I am sure I have other questions, but these have been primarily on my mind lately. If I think of new ones, I will reply with them. If you have any suggestions on how I could improve this setup to achieve my goals, please let me know. I am also willing to clarify any questions, too!

Thank you all!

Hello noorbeast,

Thank you for your helpful reply. I will read into the provided links to further optimize my build.