I’m so pissed I let debolestis talk me into giving that dude this Otto trigger I had for him to rev engineer lol. Right when I started my current job… at a prototyping and 3d print shop a year and a half ago
It belonged to debolestis originally so no, he gave it to me to rev engineer and as a favor for other stuff we had going on but I lagged on it and right when I got my new job that would have made it a breeze he wanted me to give it to the replika dude. I told him I could bang it out real quick then give the parts to dude but he wanted it to stay whole for him so it disappeared into his black whole of empty hype
Hey @thoatse - I've been toying with the idea of building a metal FFB gimbal. I started with the same setup as Rhino's design, but quickly decided that the parts would require too much CNC time. I eventually arrived at pretty much exactly the same concept that you showed several months ago. I am just wondering if you are planning release the files eventually, so I don't waste the effort of fleshing out the same design.
Hey @jakesixx33, So the last Shipped RHINO is #0062 on 2023-03-08 Average waiting time from preorder to shipped is 143 days, median is 181 days, max is 209 days 59 Rhinos are shipped in total
Here is my take on the gimbal. It's very similar to @thoatse 's version. https://youtu.be/JGP4gw0xRF8 Currently it's a 160mm^3 cube. Excuse the drafty mockup. It will be printed with combination of PLA and Nylon-CF for prototyping and once everything is set, I will make a sheet metal version.
Nice! Sorry on my late reply but that seems to have spurred your own design process. Cool to see more stabs at minimizing size, applying the same tricks sff computers do to keep them cool and quiet as well (like 1 big fan being better than 2 small ones). I have been polishing up the final details on my rework. Externally looks close but internally completely different. Finalized and placed my order for the metal parts, ranging from 1mm to 10mm thick stainless and have had bearings and other bits showing up daily for a while now.
In the process of building my initial first 5 to evaluate best best bearing solutions (plastic sleeve vs oiless metal sleeve vs needle vs maybe some ball types) and to validate design/feasibility. My plan is to offer them as kits to accompany walmis's kit.
Nice! I'd love to know what you end up with the bearings situation. Currently I am using mounted bearings from Bilda. They are little bulky, but I am not sure how online fabricators like sendcutsend deal with pressfit applications, so for now I am just using off the shelf parts. What's the thickness of the belt you are using? I am going with 15mm HTD, but I am wondering if I can get by 10mm. I probably will release the files if everything works out.
For pressfits the trick is not to rely on fab houses like scs to do them.. order parts with slightly undersize holes and use a drill press+reamers to bring them up. They can do finish work like that but it adds cost just like having them tap/chamfer etc. They may need to be over or udersize to work since bearings will vary a tiny bit by batch (plus ones like Igus has need undersize holes to preload them into tolerance) so best to do that part yourself and design accordingly. Drill press is useful if willing to buy the range of reamers you need. Pressing bearings in prints is easier cause you can adjust the printed holes till they work. I'll be posting my bearing findings for sure.
I'm using 5mm pitch/9mm width Powergate GT3 belts, starting with Gates branded ones to set the benchmark, will see if off brand ones compare. Using closed loop belt for now, might switch to open loop since the big pulley doesn't make a full rotation it can be fixed somewhere along the dia. You should be fine with 10mm HTD, the forces involved in these bases are low by their normal standards.