Yet more plank clamp things, what can i say, i have a plank above my table.
This one basically only cares about plank thickness and minimum distance from the wall. (20.2mm and 6mm resp.) You have to provide a sufficiently long rod to stick underneath. (as usual you can use tape/file a bit)
The rod isnt in there you have to make/find own of the correct length; longer than
pl-2*dx = pl - 23mm. The 'safety pin' isnt included either.(Its from another print i heated a nail through)
It comes in a few variants, converted a small and big one to stl and also a big one in two parts.(If the print area isnt big enough.)
I put stuff on my o-jasper/various-physibles github as usual. Of course the parameters said here can be changed.
Note: initially i used pfte tube on the rod to make it rotate. However this was a bad idea, as it is 'sticky'; the large static friction vs dynamic friction makes it move 'earthquake style'. Basically once it starts rotating it rotates a bunch, releasing a bunch of filament.
It is much better to have it rotate slowly, it has much less potential for the filament to get stuff. The filament drive can easily pull against the friction of the spool holder.(But not against tangles)