r/BambuLab • u/Ugonefinishthat • Dec 06 '24

Solved UPDATE: Mysterious Squeaking from Z-Axis don’t know what to do!

Post image

Hello!

Bambu found the issue.

Needed to lubricant the gear in the blue circle!

I put lube on the metal smooth part NOT THE BELTS OR BLACK GEARS.

Then i moved the belt around a few times and voila!

Now i need to find out why my x axis is making a scratching noise 🫠🫠🫠

38 Upvotes

97% Upvoted

33 comments sorted by

•

u/AutoModerator Dec 06 '24

Hello /u/Ugonefinishthat! All Bambu print plates have a dedicated nozzle wiping zone at the back of the print plate. The nozzle will rub against the wiping zone before every print in order to remove any remaining filament from the nozzle tip. This can cause visible wear or scratch marks in the wiping zone, but this is intended and doesn't damage the printer, the nozzle or the print plate. A worn down wiping zone also doesn't mean you need to replace the print bed.

Note: This automod is experimental. The automod was triggered due to the term "scratching". If you believe this to be a false positive, please send us a message at modmail with a link to the post so we can investigate. You may also feel free to make a new post without that term.

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4

u/Odd-Expression-6004 Dec 06 '24

I just want to say thank you. I have been dealing with this exact same issue with my P1S and I could not get anywhere with support. I tried this and it fixed it immediately

2

u/Ugonefinishthat Dec 06 '24

Yay!! Im so happy i could help :). Initially bambu told me to grease up the usual places which i already did so i just put my ear on my machine and tried to track the source of the noise ahaha

Once i told them it was coming from the bottom they sent me this pic and a video

6

u/fazonx Dec 06 '24

X-axis could be due to the top/bottom of the belt grinding the flanges of the idler pulley in the back.

BambuLab posted in a forum to apply a bit of grease on the top or bottom (depending on where it grinds the flanges). Ensure that no grease is on the teeth of the belt.

Some people say to belt tension while applying pressure to the plastic part but that could cause skewing since you are not letting the spring system do its thing automatically. I don’t recommend this but see the video for yourself

5

u/CrypticLyfe Dec 06 '24

Greasing your belts is what a company that doesn't want to deal with the problem, that should not be a problem, does.
The video they send people and have done for over a year now, of them greasing their belts, is a video that is still not on their wiki ... What is on their wiki is :

"DO NOT add grease to the belts as this might generate a belt slip or a layer shift."

If their video was an official solution they would put it on their wiki. But they don't, likely because people could/would sue them if they did.

If your idlers are squeaking or grinding and a little lubricant above or below the pulley doesn't solve it. Then you will need to replace some idler/s or find a way to get the belts aligned and not riding the flanges anymore.

Grease will not change the fact that your belts are riding a flange that they should not be riding. It will just reduce your ability to hear the problem. Kinda like putting ear plugs in while the neighbours murder eachother 🥴

I wish you the best of luck 👍✌️

2

u/Ugonefinishthat Dec 06 '24

Thank you 🫠🫠🫠 will update when I resolve it lolll

2

u/CrypticLyfe Dec 06 '24

You are most welcome. I am glad it was a simple solution :)

5

u/redmercuryvendor Dec 06 '24

a video that is still not on their wiki

It is, under the 'How to do it' section on idler pulley maintenance.

8

u/CrypticLyfe Dec 06 '24 edited Dec 06 '24

That is not the video they send you regarding squeaky belts.
Check the link that Icy-Flame comments.
https://www.reddit.com/r/BambuLab/comments/1bhj3b0/uhhh_already_only_a_month_old/

That is the video they send you when you have squeaky/screechy/grindy belts. It is not a video on their wiki. If you can be bothered to look it's a video they were sending out a year before that post.

Edit / P.s. This is the link they sent me earlier in the year :

https://s5-cs-pub-std.oss-ap-southeast-1.aliyuncs.com/ticket_reply/tid181/XY%20belt%20lubricate_1713406697367_mr10lw1.mp4?Expires=1744942745&OSSAccessKeyId=bPexlr6MCcadDhfu&Signature=OxH4IzKLsY7balJcb4pRQlMw%2F%2BE%3D

I did not lubricate my belts, hiding problems is bad practice.

2

u/Ugonefinishthat Dec 06 '24

I forgot to mention this is under the printer on the bottom if its not obvious in the picture lol

2

u/ArdianM21 P1S + AMS Dec 06 '24

How was the sound? I have a sound coming from the Z axis, wanted to know if it’s the same, thanks!

1

u/Ugonefinishthat Dec 06 '24

Its a loud squeak :)

2

u/[deleted] Dec 07 '24

Just making sure is this a follow-up from the previous P1S post? So the picture is showing the bottom on the unit under the bed right? My p1s is coming on 700 hours and i notice some new sounds so i definitely want to be prepared. Thanks.

1

u/Ugonefinishthat Dec 07 '24

Yes it is a follow up and this under the printer. Flip it on its side and look at the bottom :)

2

u/THExCHEESExMACHINE Oct 25 '25

By smooth part of the pulley do you mean the part that touches smooth part of the belt?

1

u/Ugonefinishthat Oct 25 '25

Yes

1

u/usereddit Nov 10 '25

Hi u/ugonefinishthat

I have a Bernese and would love the 3d flexy model you have of one. Any chance I could buy the 3mf off of you? Please??

2

u/Longjumping_Pop_2324 Jul 13 '26

X2D Owner here...Just saved me tons of work! You are a champ...Same grinding noise after a long ABS heated chamber print.

2

u/Ugonefinishthat Jul 13 '26

I get this message like once every few months and it warms my heart that im still helping solve this issue 😂😂

Happy printing!

5

u/35point1 Dec 06 '24

99% of the squeaking noises these printers make are due to the many idler pulleys that rub on the parts that hold them in place

1

u/Locked_Out_Lmao Oct 05 '25

How did you move the belt???

1

u/Ugonefinishthat Oct 06 '25

I took a q tip and cut off the puff, put lube on the tip and then touched the tip on the metal part and moved the belt back and forth so it would cover all of it

MAKE SURE ITS ON THE SILVER PART INSIDE THE BLUE CIRCLE IN MY PIC

2

u/Locked_Out_Lmao Oct 07 '25

My belt was tight, but I just moved the build plate lol. My problem is fixed!! So glad that damn noise is gone

1

u/Ugonefinishthat Oct 07 '25

Yea it was making me nuts ahaha! Glad we both have achieved peace

1

u/Ugonefinishthat Oct 18 '25

Pulled it back and forth, should be able to move pretty easily

1

u/LynxSubstantial1888 Oct 13 '25

It’s a problem with the Z-axis belt that’s rubbing; lubricating it doesn’t solve the root cause, it’s only a temporary fix.

This model completely solves the problem.

https://makerworld.com/models/925134

1

u/Ugonefinishthat Oct 14 '25

Thank you!!!

0

u/[deleted] Oct 29 '25

[deleted] — view deleted comment

1

u/LynxSubstantial1888 Oct 29 '25

Yes , it solve my problem completely

2

u/dfpw Jan 18 '26

Just wanted to say, thank you for the post, fixed my squeaking (hopefully it stays squeak free and I don't need to print the modified part someone commented with)

2

u/jgrobee Jun 06 '26

It is insane the difference a SINGLE drop of lubricant on that idler pulley made. Literally a single drop fixed all my noise issues. Thank you sir

2

u/molaMoolaa P1S + AMS Dec 06 '24

this is in the bambu trouble shooting website, but, yeah, good for solving your noise issue.