Poop Snagger for Bambu X/P Series Printers

There is an annoying issue with the Bambu Core XY printers that use the nozzle wiper that looks like a bit of PTFE tube on a flat plastic “S”.  When the wiper becomes worn or damaged, it doesn't wipe properly, and it will often drag the purged filament out of the chute and fling it onto the print bed.  If you're watching your printer, you then find yourself scrambling to grab the ‘poop’ before it ends up stuck to the nozzle and ruining the first layer of your print.  This had been happening to me for several months with every single print, so I decided to do something about it.

There are plenty of interesting mods out there to address this concern, including some that use the newer nozzle wiping “brush” that exists on the A1 mini, or that are chute covers. Each has its pros and cons, and I expect that mine will also have its design flaws.  Personally, I didn't want to spend more money on parts that I had to adapt to another purpose, and I wanted to find a simple solution that just adds to what the printer already has.  When I noticed that the poop always has a long strand of filament at the end, the simplest thing that I could think to do was to snag the strand and add something that would hold on to the bulkier coil of poop.

I settled on a kind of fork like model and designed it to slide on to the original wiper so that it would all be one simple unit.  I needed to use a longer screw to hold it all together and used one of the screws that came with the printer for the scraper that I never built.  I also made sure that it sits nice and low in the purge chute so that it doesn't interfere with the normal operation of the wiper and it can't collide with the nozzle.

I designed the model with support already built in as I find that it prints much better this way, and it reduces the cleanup effort that you always seem to end up with when using slicer supports, especially when printing small models.  You will need a pair of side cutters to snap these supports off as I needed to handle an awkward floating bit at the angle that I chose. Just be sure to include a brim to make sure the first layer of the model has something to hold it down as the first handful of layers are being printed, and orient the print to have the little triangular bit of the support in contact with the print bed.

So… the most important question is, “Does it actually work?"

See for yourself:

*** Update 21-06-2025 ***

After extended testing, it turns out that the print head doesn't always go to the exact same position when purging.  Sometimes it can be a little closer to the nozzle wiper, and at other times further away, but always over the shiny bit that you see at the top left of the chute.  Since this can cause the purged filament to stick to the fork before it has sufficiently cooled, and because not everyone feels comfortable modifying g-code, I've modified the geometry slightly, shortening the fork to minimise the likelihood that purged filament will stick to it.

That should address any of the issues I could foresee. So far for me, this adjustment has been working perfectly over the 30 or so tests plus additional prints that I've done. but if you do run into a problem with this model, please let me know and I'll be happy to help you solve the problem.