The problem is not the mechanical design, slipping a toothed ring over the motor is easy.
The hard part is designing a very compact and efficient driver and rotary encoder. Space and weight and cost really matter for this application, and 12 of these motor/driver/reduction systems are needed. Very high speed FOC comutation is needed. I suspect a custom PCB is needed. On Wed, Oct 12, 2022 at 8:04 PM Gregg Eshelman via Emc-users < emc-users@lists.sourceforge.net> wrote: > Put a bearing in the frame for the motor shaft to run in, then the motor > has support at the shaft and the 4 fasteners on the opposite side. That > would provide maximum support for a toothed pulley ring on the outside. > > Another possibility is electric skateboard wheels with built in motors. > They can be some pretty tough units. This guy takes his Maxfind board off a > few jumps onto a street with no damage. It has one rear wheel with a motor. > The board is designed for cruising, not stunts, but can still take plenty > of abuse. > > https://youtu.be/bFi55fSqdZY?t=1915 > > Jump to 31:55 if the link doesn't take you to the time. > > Replace the urethane wheel with your toothed pulley or gear. The width of > the wheel could be used for wider gears to spread out the load so the gears > will wear less and be more resistant to breaking. > > On Wednesday, October 12, 2022 at 11:48:45 AM MDT, Chris Albertson < > albertson.ch...@gmail.com> wrote: > > I'm actually thinking of using belts and motors where the outer housing > spins. I could press-fit a toothed ring around the motor and make a timing > pulley with a motor inside. The ring would need to be metal as it would > get hot. A motor like below might work. See that in this kind of motor > the shaft is welded to the housing and the entire motor housing spins. > > getfpv.com/brotherhobby-avenger-2806-5-motor-870kv-1300kv-1460kv-1700kv.html > < > https://www.getfpv.com/brotherhobby-avenger-2806-5-motor-870kv-1300kv-1460kv-1700kv.html > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
