Either you have big hands, or it looks a little on the small side. Have you tried to put anything inside of it yet to test fit?
It's designed for a 77mm can with
very small tolerances
... It should be
very snug.
Anybody able to 3D print a new RPD knob?
If so I’ll send $$ my donor came without one.
I've modeled one up and have printed it for mine but the PLA I used did not "stay" on the shaft. If you want I can print you one and you can hot clue it on or something... (See attachment if you want to have it printed elsewhere)
The Mayor’s new cup holder printed out great. For you total noobs out there like myself it printed fine with no supports. I went 20% infill with normal PLA and it’s got a little flex. I’ll print another one a little more solid. Here’s some pics
I designed this to be printed without supports for
my printer and my settings. That's not too large of a bridge to print and the overhangs aren't too difficult with a decent enough layer height. With supports, however, it's even more clean. 45 degrees is usually a safe bet for angles, I'm not 100% sure what those ended up being... they're a 14mm diameter circle split in two so whatever that ends up being.
Regarding your rigidity, try more side walls. I usually print with 4x walls and 10-15% infill (I forget the fill option in cura). The infill isn't what gives it rigidity as much as walls and layer height do (in my opinion) I've found that 4x walls is the sweet spot for super sturdy prints, regardless of infill.
I usually print .1 to .2 depending on how large something is. If I want a quick draft for sizing I do .3 but then it's relatively weak in terms of layer adhesion including especially infill.
You don't necessarily need infill past the mid-low teen % if your other settings are spot on (in my experience) I do occasionally run with a higher % infill if I have large spots of flat surface with weird top designs on them, because the layers on top end up being printed on thin air and don't come out well... 20% gyroid does really well for those types of prints but it takes
forever...