While 3D printing has been a great thing all by itself, it has also made electromechanical hardware a commodity item. Instead of raiding an old printer for motors and rods of unknown provenance, you can now buy everything very inexpensively due to the economy of scale and offshore manufacturing.
[Mr. Innovation] proves this point with his recent paper cutting machine which feeds and slices paper strips with user-selected width and quantity. He did steal one roller assembly from an old printer, but most of it is straight out of a 3D printer build. There’s NEMA stepper motors, modular motor driver boards, smooth rods, belts, and pulleys.
The blade of the cutter is just a standard snap off box cutter blade. It is angled so it doesn’t drag when the motor pulls it back to the home position after a cut. Honestly, we might have made the paper mechanism retract the paper a bit at that point, but that would be simple to add to the device’s firmware.
You might think an automated paper cutter is a bit lazy, but we could see if you were cutting up flyers for a hackerspace event, or cutting paper insulators to fit in an enclosure for a kit you were selling in small quantities.
The biggest issue we saw was that the machine is open loop. It would have been interesting to put an optical sensor between the roller and the blade. When the paper covered the sensor you’d know the position of the edge and could then move the paper a precise amount, assuming it didn’t slip. Another idea would be to put the sensor after the blade in such a way that it could be moved so that the cut would happen once the paper covered the sensor. You could probably do the same thing with a microswitch or some other sensor.
Still, this looks like a simple but useful project for some leftover 3D printer parts. Just be careful with the open blade.
We couldn’t help but think about building this with a floppy disk blade for cutting plastic. Or you could mount a laser (but use a different power supply, please).
Never mind the spelling mistake at 6:21… but a stronger version of that that can securely cut up an expired debit card would be real handy.
There is a worse spelling mistake a bit earlier, where it says ‘cm’ and should say ‘mm’.
Doesnt seem to take in account the calibration of the first cut.
When seeing the video it tought it was doing a sacrifice cut so the width was set to zero, doesnt seem to be the case.
Also not a very clean cut of you don’t feed it trough another set of rails.
Maybe cut before the large rail with a small channel on the bottom,that would get you a nicer cut, or run a sort of pizza cutter wheel so you have downwards pressure.
But why? What is the usecase here?
You have selected: “Slow and painful”.
I could see it work as a module of an assembly-line, put 2 on the sides to trim the width and you got a automatic trimmer
Pizza wheel would double output tho.
paper quilling?
“be careful of the open blade”. Really? I never knew.
“I never knew.” in that case I really should mention that running with scissors is not a good idea either.
These look really good
This is much better way for cutting any kind of page. also visit
https://www.blurspy.com/
Paper cutting is easy for this 3D printer. But, I really don’t like its whole layout!
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Thanks for sharing. Good idea but be careful with the blades.
“be careful of the open blade”. Really…..
Thanks for sharing. Good idea but be careful with the blades.