Mini Force Feedback Momo Steering wheel by TronicGr

Last crawled date: 3 years, 1 month ago

This is the design and STL files for the miniature Force Feedback Steering Wheel I made with spare parts leftover from other projects. The best feature it has is its rotation range of 720 degrees, like real steering wheels and has no real hard stops, apart from software defined ones.
The motor is powered by a 3.7v 2500mA battery that is charged by a battery charger (Adafruit) and then step-up to 18.5v. The small gearmotor that was used can operate on 24v so with less voltage stalls easier without shorting too much current. The motor is driven by a tiny 1A hbridge.
The FFB controller was designed by me back in 2015 and has DB9 plugs on the back so you can attach the original G27 Shifter and G27 pedals that I have. It runs MMOS Firmware and has additional wireless button support.
I'm placing here a link to the copy of MMOS firmware I use:https://www.dropbox.com/sh/fzc7cy183o5leo0/AAC-j_G-WUA86__moOBOtHcMa?dl=0
For testing the device I used 4 buttons attached on a adafruit piggrl button pcb that I had leftover on the side of the motor cover, and connected a small thumb stick to control gas and brake.
Test drive video: https://www.youtube.com/watch?v=B8tzYqHKpQg
See this video if you are not sure what is force feedback or what it does:https://www.youtube.com/watch?v=kqW52P0Fx2c
Some closer look on the device:https://www.youtube.com/watch?v=3rmzyQ3uMXU
I added the Logitech G27 Shifter and Pedals on the following videos:https://www.youtube.com/watch?v=i7p0dBDt5jUhttps://www.youtube.com/watch?v=2Ef2HBR85Cw
And Test Drive with them: https://www.youtube.com/watch?v=Qo3ZaC8Bhc8
The motor was salvaged from a tiny winch, probably used originally for setting flaps on aircraft. From the markings on the gearhead and voltage experiments is that the motor is a Micromotor 24v/500mA stall, 14600RPM with stall torque 2,89 mN-m. After reduction translates to 124.3mN-m. Multiplying for the wheel radius we get 1 Newton torque on the steering wheel on full stall !!!
Faulhaber
Minimotor SA
14/1 diameter, 43:1 reduction.https://www.faulhaber.com/en/products/series/141/https://www.faulhaber.com/en/products/series/1319sr/
The encoder I use is a magnetic contact-less AMT103:https://www.digikey.com/product-detail/en/cui-inc/AMT103-V/102-1308-ND/827016
it has resolution 2048 CPR which is more than enough to ensure smooth measurements for the FFB.
For a good read on the larger FFB steering wheels see here:https://sites.google.com/site/steppersimwheel/build-guide
If you want to make a real size one, with real powerful Direct Drive SERVOMOTOR, head here for more information: https://www.thanos-motion.com/products/thanos-tdd-controller/
Thanks
Thanos