An adapter to mount your OpenPrintTag onto Prusament spools, part of a modular system for different Spools. The main idea is, that you can reuse the baseplate (with the OpenPrintTag) indefinitely. If you want to use it on a different spool, simply print the matching adapter. Because of this, the backplate is a separate model, which you can download here, including a small jig for helping to install the sticker.
This adapter fits Prusament-Spools with roughly 50 mm inner diameter and a width of 68 mm. The hole inside this adapter is 38 mm, which should be enough for most spool holders, like the classic Prusa i3 one. All parts can be printed without supports. I would advise using a springy material like PETG. There are now three tolerance versions: the original one, one with a bit tighter springs and the last one with even tighter springs. The original one is the one that I printed on my MK4 with Sunlu PETG. You can install and uninstall it quite easily. At least for me, the springs are tight enough to not fall apart on their own. If you want tighter springs, just print the tighter versions and let me know if they work for you.
Is this model overly complex? Yes, probably. But where's the fun in simple designs :D
The springs in this design are supposed to counter dimensional inaccuracies of the 3d-printed parts and the spools itself. It worked for all spools I tested, I hope it works for yours too.
To install it, place the backplate on a flat surface, put the spool on top of it. Then place the baseplate and spring onto it, press it down.
To uninstall it, slightly pull the backplate outside with your fingers.
The author marked this model as their own original creation.