I like it. Cheap and easy.
Looks like a little bulge in the joint, so you'd have to be a little careful about how it feeds, but I think it would be pretty easy to check.
Also like how you don't need to completely unspool one side to make it work.
this post was submitted on 24 Jan 2025
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Most printers won't care much about diameter on feeding, although if you run your filament through a Bowden tube that's cruising really close to the specified diameter that may cause you some problems. The real effect will be that your extruder assumes the filament diameter is consistent, so if you're over or under you'll get an over- or underextrusion. I don't think there's enough length of off-spec filament created by this process for it to noticeably matter, though.
Our printer feeds fine with filaments bulging up to 2 mm. What it doesn't like is uneven transitions.
Yeah, I imagine if you had like a stair step in it that might give your extruder gears some trouble.
And most importantly, your paper probably requires significantly less nasty chemicals used and disposed of in its production than PTFE.
PFTE, a.k.a. Teflon, is a forever pollutant in and of itself (despite the finished product being mostly inert), but the ingredients used in its production are seriously nasty stuff. Just using little chunks of it and throwing them away to merely stick bits of filament together is a monumentally stupid idea, and Sunlu ought to be ashamed of themselves for even proposing it. I'd rather freehand splices together with a lighter than do that.
Even better: you can reuse the baking paper if you don't overheat it 🙂
Epic follow up. We keep parchment paper on hand and I'll give this a go when I'm getting near the bottom of a row. This will be much easier than feeding the new role in mid print.
This is brilliant!
I'm gonna try the with tpu filament to make an o ring for my water bottle, thanks for the low tech approach, very cool ingenuity.