Summary of "Why I CHANGED the Poop Chute on my Bambu Lab P2S!"

Why I changed the “poop chute” on my Bambu Lab P2S

Context / tech concept

Bambu Lab printers (including the P2S) purge filament during calibration and color changes by extruding small blobs/balls of filament — commonly called “poop.” That waste is routed out the back and needs a catch or chute to avoid messes and machine errors.

Problem: with multi‑color prints there are frequent purges. Hot filament blobs can stick inside a chute, build up, and cause jams or a “full of poop” error that stops prints.

Original chute (previous design)

The author’s original printed chute (PLA) worked, but had key shortcomings:

Narrow, slanted shape allowed hot purge blobs to stick mid‑chute → buildup/“constipation” → stopped prints.
Limited capacity → occasional overflow and filament on the floor.
Some geometry risked blocking rear fans (this was later fixed in other versions).

New chute (what he switched to)

Switched to Chris1974’s “version 2” poop shoot.

Wall thickness / print options:

1.6 mm walls — sturdier, ~5 hours to print, ~267 g filament (what he printed).
0.8 mm walls — faster, ~2.5 hours to print, ~130 g filament.

Observed benefits:

Much larger internal volume — significantly less frequent emptying; handles long multi‑color prints.
Geometry prevents back‑up and does not block rear fans.
Sits against the printer side and catches many more purge blobs (demonstrated on camera).

Practical notes, tips and analysis

Cause of sticking: purge blobs are still hot and can adhere to chute walls. Surface coatings (e.g., tape) can help, but improved geometry and increased volume are more robust fixes.
Use case: if you run long prints unattended (overnight or while away), a larger-capacity, anti‑clog chute reduces the risk of stopped prints and messy cleanups.
Tradeoff: the larger/sturdier print uses more filament and longer print time but reduces maintenance and cleanup effort.
The author demonstrates actual purge blobs and color transitions to show why volume and shape matter.

Resources / guides mentioned

Previous video: “top 10 / first 10 prints” to do on a new Bambu Lab printer (referenced).
This video functions as a short guide/review comparing chute designs and explaining why he replaced his original.
The channel contains a 3D printing playlist and other tutorial videos.