PTFE & Filament cutter Enclosed for use in schools etc

I printed the peg spring version, the black is PETG, the red is ASA. Looks good, but besides that....:( I had to clean all the screw holes otherwise the screws.do not pass through. This is ok, but instead the holes for the PTFE tube are a bit oversized :O
Fitting the peg spring inside was a pain, but I managed. Screwed everything together just to notice that it doesn't work :( The same as the other comments, the blade doesn't go all the way up, because the spring is constrained.
Also, I used 20mm screws, which are too long. And the 16mm are too short.

Dear author, unfortunately my rating for this device is not very good, as it did not meet my expectations and even needed adaptations to be able to function properly.
The peg spring version has a conceptual error where the spring axis does not coincide with the arm axis, so the spring itself prevents the movement of the blade arm. I was about to throw it away and print the other version again, when I decided to try it with the dreemel and it worked, see photos.
It was necessary to open the way for the spring to work and make a small bend in the spring rod. Then it worked.
However, I expected a straight cut in the PTFE tube, but the result is an inclined cut. No matter how hard I try, the cut always comes out at an angle.
I will only use the tool to cut filament, as the angled cut is welcome there. (edited)

i've printed the peg springs version first and it was awful

the spring was blocking the mechanism making impossible to make the blade go all the way up resulting in a bit of the blade peeking on the holes from his resting position, when i've tried to slide the PTFE tube in his slot a bit of it got scratched, maybe the spring wasn't the wright one but having the spring not centered just sucks no matter the sanding,
and it was nearly impossible to get a straight cut

then i've printed the other version featured in the photos of the assembly and since i didn't had the requested spring i had to make one myself by wrapping around a 1mm steel wire around a 3.2 diameter steel rod and IT WORKED!
cuts well and straight, the machanism works as it's supposed to

in order to not waste material i've mounted on the bad ''peg springs'' version the open blade variant

Perfect! Great model, Thank you!
as possible improvemnts:
1) some sort of latching mechanism?
2) few alternative positions for the blade, to move it few mm when the portion that is used for cutting becomes dull ( like if you cut a lot of filament but not many of tubes) , as it is now only turning the blade is an option

沒找到合適的彈簧