Mini Force Feedback Momo Steering wheel

thingiverse

This is the design and STL files for the miniature Force Feedback Steering Wheel I crafted from spare parts leftover from other projects. The standout feature it has is its impressive rotation range of 720 degrees, similar to real steering wheels, with no hard stops except those defined by software. The motor is powered by a 3.7v 2500mA battery that's recharged by a battery charger (Adafruit) and then stepped up to 18.5v. The small gearmotor used can operate on 24v, but stalls more easily without drawing too much current when less voltage is applied. The motor is driven by a tiny 1A H-bridge. The FFB controller was designed by me back in 2015 and has DB9 plugs on the back for attaching the original G27 Shifter and G27 pedals that I have. It runs MMOS Firmware and supports additional wireless button functionality. I'm sharing 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 to an Adafruit piggyback button PCB that I had leftover on the side of the motor cover. A small thumb stick was also connected to control gas and brake. Test drive video: https://www.youtube.com/watch?v=B8tzYqHKpQg If you're unsure what force feedback is or what it does, see this video: https://www.youtube.com/watch?v=kqW52P0Fx2c Some closer looks on the device can be found here: https://www.youtube.com/watch?v=3rmzyQ3uMXU I added the Logitech G27 Shifter and Pedals in the following videos: https://www.youtube.com/watch?v=i7p0dBDt5jU https://www.youtube.com/watch?v=2Ef2HBR85Cw And a test drive with them can be seen here: https://www.youtube.com/watch?v=Qo3ZaC8Bhc8 The motor was salvaged from a tiny winch, likely used originally for setting flaps on aircraft. From the markings on the gearhead and voltage experiments, it appears the motor is a Micromotor 24v/500mA stall, 14600RPM with stall torque 2.89 mN-m. After reduction, this translates to 124.3mN-m. Multiplying for the wheel radius yields 1 Newton torque on the steering wheel at 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 larger FFB steering wheels, see here: https://sites.google.com/site/steppersimwheel/build-guide Thanks, Thanos