I was getting rid of some spool ends the other day by manually feeding them in while printing. That way I was able to push all these ends past any sensors and into the extruder for uninterrupted printing. It came out fine but was quite tedious.
So this got me thinking: Do any of you guys splice filaments? Not only would this allow for more efficient material use, but I suspect a print made from a bunch of small segments of different colors could look kinda cool.
I’m primarily printing with PETG, so my question is specifically about that, but I’m sure the concept should work for other filaments too.


Bambu allows you to automatically switch to a different spool from ams when you run out and continue printing, so this becomes unnecessary.
Yep. I think other manufacturers do this with multi-material units, too. It’s a really clever way to handle the issue and one of my favorite features of the AMS. Spool running low? Just throw a second one on there, tell the printer they’re the same material, and bam. Wake up the next morning to an empty spool and a completed print.
Not completely unnecessary. I have several 95% used tricolor filaments that aren’t wound with the colors in the same orientation so I can’t just feed a replacement in. I’ve tried splicing but it’s been insanely difficult to get them to line up properly while the plastic is still heated.
I meant in the context of the post where primary focus seemed to be using up the leftover bits of filament