Fixing the Annoying Squeaking P2S Noise on Bambu Lab P2S 3D Printer (Updated)
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Time to read 3 min
Table of contents
P2S Noise: Symptoms and Misconceptions to Rule Out Root Cause of the Noise Issue and Solution Step-by-Step Instructions to Fix the Noise (No Idler Disassembly) 1.Locate the lubrication point 2.Prepare the right lubricant 3.Spread the lubricant and test Long-Term Maintenance (Optional Idler Disassembly) Summary: How to Stop P2S Noise for Good
The Bambu Lab P2S 3D printer is a top choice for many makers and enthusiasts thanks to its excellent printing precision and user-friendliness. However, after using it for a period of time, some users may encounter an irritating high-pitched squeaking P2S noise during printing—so loud that it’s like having a nest of mice scurrying around whenever the print head moves. Not only does this noise ruin the user experience, but it also raises concerns about potential equipment malfunctions. Today, I’ll share a tested and effective solution to resolve this issue once and for all.
P2S Noise: Symptoms and Misconceptions to Rule Out
After using my Bambu Lab P2S for a while, it started making noticeable squeaking P2S noise during printing—sharp "squeaks" when moving left and right, as well as forward and backward. This P2S noise was especially unpleasant while printing, and it only got worse as I continued using the printer.
At first, I thought the P2S noise was caused by the print rods and assumed lubricating them would fix it, but this attempt was completely useless. This is a common misconception many people fall for: this type of squeaking P2S noise is NOT caused by the print rods, so oiling the rods won’t solve the P2S noise at all.
Root Cause of the Noise Issue and Solution
After troubleshooting, I found the real source of the P2S noise: the idlers on the Bambu Lab P2S. But there’s no need to disassemble them to fix the immediate P2S noise issue. The squeaking occurs due to friction between the idler assembly and the belt, and this can be resolved with targeted lubrication—no need to remove the idlers.
Step-by-Step Instructions to Fix the Noise (No Idler Disassembly)
1.Locate the lubrication point
Identify the deep hole at the idler assembly location – this is where lubricant needs to be applied directly, without taking the idlers apart.
2.Prepare the right lubricant
I used the official grease supplied by Bambu Lab (note: it’s grease, not regular lubricating oil) to tackle the P2S noise. Later, following other makers’ recommendations, I also tried silicone-based specialized oil for belt maintenance—and it worked wonders for reducing the P2S noise long-term.
3.Spread the lubricant and test
Move the printer’s X/Y axis components back and forth to spread the lubricant evenly over the friction surfaces. Test the printer immediately to confirm the P2S noise has been eliminated.
Long-Term Maintenance (Optional Idler Disassembly)
While disassembling idlers is not necessary to fix the immediate noise, it can be done as part of major maintenance (note: idler disassembly is quite cumbersome and only recommended for long-term upkeep). If you want to perform in-depth maintenance to prevent future issue:
- Remove all four corner idlers (this is a more complex process, so proceed with caution) and thoroughly clean off any black belt grime from the idler edges.
- After cleaning, reapply silicone-based specialized oil to the idlers and belt—during my second round of this major maintenance, there was almost no black grime on the idlers, and th noise did not return.
Summary: How to Stop P2S Noise for Good
Don't panic if your Bambu Lab P2S starts squeaking during printing. The core issue behind the P2S noise isn't insufficient lubrication of the print rods, but friction at the idler assembly—and you don't need to disassemble the idlers to fix it.
By using Bambu Lab's official grease or silicone-based specialized oil directly to the deep hole of the idler assembly (no disassembly required), you can easily eliminate the P2S noise and restore quiet printing.For long-term prevention of P2S noise, you can opt for major maintenance (disassembling and cleaning the four corner idlers) – though this is cumbersome, it further reduces the chance of P2S noise returning. If your Bambu Lab P2S is plagued by this noise, start with the simple no-disassembly lubrication method—it’s fast, easy, and effective. The silicone-based oil is a game-changer for long-term P2S noise prevention, and you’ll never have to put up with that mouse-like squeaking P2S noise from the moving belt again!
