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Adjustable Purge Bucket for CR-10 printers (and similar)
thingiverse
I liked the original design from 3dMakernoob, but it didn't quite fit my printer. I also wasn't a fan of the wire brush it used, plus it was a pain to put on and remove (since my CR-10S is in an enclosure). So, I took that design as inspiration for an adjustable version that should fit any printer with ~70mm spacing between the delrin wheels on the z-axis. You'll need a 3mm thick silicone sheet that's roughly a 50mm (2") square. I bought a meter long roll of [50mm wide by 3mm thick from Amazon for $5 US](https://amzn.com/B00LNE8VD0). The silicone should hold just fine with a friction fit, but if it doesn't work there's a hole for a short m3 screw to lock it in place. You mount it on the printer by: backing the bolts for the z-axis out about 3mm (do not remove them entirely); fitting the large holes over the bolt heads; sliding the bucket mostly to the right; then tightening the bolts most of the way (but not so tight that you can't adjust things in the next step). Next you just need to move the silicone sheet up/down and slide the bucket left/right on the wheel bolts until everything lines up nicely. Then you can just tighten the bolts the rest of the way back down to lock it in place. I also got good results by leaving some extra vertical slack and then cutting a small groove for the nozzle in the silicone. You might also want to put some aluminum tape on the inside first, to prevent filament from sticking. Although, I've found that just rubbing a bit of vegetable oil on the inside seems to have permanently done the trick for me.
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