me with same issue, i purchased the printer 1 week ago and makes from the first day, i maked a ticket end they replied the next day, but saying tha this ressonance i normal, bla bla bla, i dont think so, it seems to be a bad assembly or a defectuous part, the thing is if now is making that sound when i has thousand hours or printing ir going to be louder and maybe break some parts.
Same issue.
The problem gets worse from time to time. It comes back again and disappears.
I have the screeching scratching sound from X-Y axis movement on my second X1C. It did this new out of the box and I almost returned it immediately.
It still happens so I created a ticket.
Mine is Iām pretty sure coming from the belt rollers, pulleys on the gantry, not the ones at the back corner by the motors.
During the stepper motor sounds calibration it is hideous. I clearly have a left screech and a right screech, and sometimes it is in stereo. It often happens during the sample movement, masking the sound of the motor, thus rendering the data for calibration worthless, so the printer is extra loud.
For some prints it is unbearable. It sounds like fingernails on a chalkboard. The noise is speed-based, each at only a certain speed.
I sent the ticket and sadly support sent me a one-off video that is not posted anywhere else by Bambu, and is not listed or discussed in the maintenance pages.
The video shows dumping the bambu grease all over the OUTSIDE of the rollers, and they put a large amount of grease on the timing belt! ???
I am disappointed. Iām guessing that these are just poor quality bearings, that, while cheap, are very expensive and labor-intensive to replace.
It is stated in maintenance that these pulleys are sealed and donāt need to be lubed.
No one on the Internet says it is ok to lube belts, because when that gets to the tooth roller, it will be skipping teeth.
I donāt know what to do. I am not able to upload the video they sent me but the title is literally: āLubricate XY axes and beltsā.
Here is a screenshot. After the grease the next shot is moving the XY axes and spreading grease all over.
Iām certain that this grease on the belt will cause the belt to fail prematurely, since the belt is rubber. Iām not sure what to think now.
Someone on reddit with the same issue and same private suggestion by Bambu support to lube the belts, thinks that the issue can be caused by the belt running to close to the edge of the pulley.
I still think these pulley have sloppy bearings or are dry, and should be replaced. I will challenge support and ask them to be honest.
Yeah, not sure Iād follow that advice from support.
Do you think itās that pully or the Idler in the auto belt tensioner? That one would be easy to lubricate or swayp pullys in.
Make sure that the tensioner is tightened. It doesnāt need to be ābatten down the hatchesā tight but the screws should be snug. What you could hear is that moving when the belt moves.
Honestly I tried what they recommended and it worked just fine all screeching stopped immediately. I would just trust them and try it I guess Iāll see in the next couple months if my belt go bad lol. One note is that I used the PROVIDED grease which hopefully does not soak into the belt. I guess time will tell
IF the provided grease is silicone based, it will not damage plastic or rubber parts. I would still apply it sparingly and then wipe off any excess that does not appear to be actually lubricating. If the grease gets on a build plate it can prevent filament adhesion and be difficult to remove.
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same thats what i thought, i used the provided grease that they said to use and it seemed to fix the issue
Mine is making the same sound!
Hello! I had the same problem. Iāve read your comments, and tried different ways but havenāt found a solution. You can watch my video with this sound: https://youtu.be/75TmJExP9Bs . I think itās coming from the back panel.
If you know what it could be - please help me.
To all of you with the same ratteling sound, i had the same problem til a minute ago. I just lubricated the Y rails (the rails on the sides, NOT the x rails where your printhead is mounted on) with these kinda liquid lube, which didnt do anything. Then i used the thicker machine-grease (i used one for bearings and fast moving parts) and it sounds like new.
Solution so far: use thick lube/grease NOT these fluid ones, those seem to be too thin.
I think youāre dealing with belt alignment. I had the very same noise and I noticed it was coming from the right rear of the machine. I turned the machine around and noticed both belts were all the way up and rubbing on the flange of the pulleys, Moving the head to the left side of the machine made the sound go away and I checked the pulleys again. Now the belts were on the bottom flange. So I went and looked up proper belt alignment and they should be in the center. not riding the flanges.
So now the fun begins, need to loosen both screws on both pulleys, the top and bottom. The move the head to the right rear corner. If the belt rides up then youāll need to move the bottom adjuster by pushing it in, while holding it tighten the bottom screw. Then move the head to the opposite side and see where the belt rides, if both ride in the center then tighten them and run calibration again. If the sound moves to the other side or the belt is still riding to far up youāll need to do the same procedure. It took me about 4 times back and forth on each side to finally get the pulleys centered and riding properly.
It seems that when the belts are all the way up and actually pushing on the flange what youāre hearing is bearing noise. Once even tension is on both of the pulleys it goes away. Itās a bit of a dance to get it right but it pays off big when you do.
Hope that helps
M1
Most likely a back panel bracket or internal wire vibrating