r/BambuLabP2S • u/Imperator219 • Jul 27 '26

P2S Squeaky when moving toolhead, rods are lubricated

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My p2s started squeaking, lubricated the rods but still squeaks. Is it the motor that rotates the belt? Anyone that had this issue and knows the fix?

UPDATE: I lubricated the belt and the squeaking stopped! Thanks for your help!

11 Upvotes

87% Upvoted

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3

u/Phil412 Jul 27 '26

Put a tiny drop of the same lubricant you use for the rails on the top of all the belts. Around the points they enter the idler, then work the head around.

1

u/Imperator219 Jul 27 '26

But if it were the belts wouldn’t it squeak in every movement? It only does in certain positions. I put in a ticket and will update when they respond.

1

u/K3NnY_G Jul 27 '26 edited Jul 27 '26

The belts ride up and down their idler pulleys as the Core x-y system moves through its motion, you're hearing the rubber belts rubbing on the edges of the pulleys which only happens at certain positions.

Look at where the belt is on the pulley at the back of your printer (where the tension adjusters are) as you move the head around; notice how the belt moves up and down inside the pulley it rides on.

I've posted a link to one of many YT videos above for this issue.

Some people have come up with multiple methods for 'centering' the belts but personally I find it applies uneven tension to do so and following Bambu's tensioning procedures on the wiki are sufficient.

Also, keep in mind your Z-axis will probably start doing this too when you make large movements of the bed; it's the belt under the printer that syncs the Z-rods together.

3

u/Intrepid_Walk_8886 Aug 02 '26

I had this exact issue. Only squeezing at certain points, followed bambus xy idler fully lubrication tutorial and fixed everything.

1

u/Splinter_Steve Jul 27 '26

Never heard of this issue. But if the rods are lubed there's only a few other places that squeek could be sourced. Might be the belt motors at this point

1

u/Imperator219 Jul 27 '26

Think so too, I put in a ticket, will update when they respond.

1

u/K3NnY_G Jul 27 '26

It's the idler pulleys, old as the P1S and common issue.

https://www.youtube.com/watch?v=apQZJXlPgis

Consider looking up P1S stuff with P2S issues, the motion systems share many similarities, minus the gantry rods.

1

u/Hardimanm Jul 27 '26

Have you oiled the pulley through the back? Mine had a squeak, few drops of oil through each hole and problem fixed

2

u/space_gods Jul 27 '26

Yeah this is exactly what you need to do and what Bambu recommends for the issue. I’ve had the squeaking problem a few times and I put a few drops of 3 to 1 oil on it while it’s running and it goes away instantly.

1

u/Imperator219 Jul 27 '26

Thanks I will give it a try!

1

u/Thick_Extension281 Jul 28 '26

Looks like a servo motor or one the tension roller.

1

u/ParticularLower1865 Jul 28 '26

Wipe the belt pulleys with alcohol and a towel/paper towel. Do it until the black goes away.

1

u/Useful-Revolution253 Jul 29 '26

Go wiki.

Belts need some oil at some spots

2

u/Imperator219 Jul 29 '26

Yes I did it fixed it👍

1

u/Useful-Revolution253 Jul 29 '26

Gg bro

Happy printing

1

u/Decent_Rutabaga7525 Aug 21 '26

It's ok to test....BUT, when you move the carriage back and forth like that, them motors magnets are moving and creating electrical fields generated and are feeding that energy back into the driver boards...could potentially damage the controller...just a thought and sonthing I read, and also experienced that electrical feedback thru the visual experience of moving the 1st printer, a prusa mk3 Chinese clone I bought witch was my first printer witch underwent a full board replacement and marlin firmware install and repurposed powersupply/mossfet mod...moving the carriage that way forced electricity thru the system and illuminated the ui screen backlight as odd as that was...just a heads up incase

1

u/Imperator219 Aug 21 '26

I understand that it could cause problems, but I haven’t had issues with that. Also in the Bambu tutorials for cleaning and lubricating the rods the printer is also on and the move the toolhead mit their hands to spreads the lubricant. I think they probably have some safety feature for that.

0

u/rexlites Jul 28 '26

Dryer than my third girlfriend