Every single time I start a print on my X2D (but it probably affects other models too), the printer does the homing, bed levelling, etc and one of the last things it does is 2 very loud noises. They’re similar to the noise it makes during noise cancellation calibration. I believe, but I’m not sure, that it’s checking for belts resonance to determine if they’re properly tensioned.
My printer in next to wall separating my flat to the neighbours. I think the normal printing can’t be heard on their side, but this “calibration” sure will. I feel like I’m testing their patience every time I start a new print.
If this is really about checking the belts tension, surely it doesn’t need to happen every single print. Once per day or once per week should be adequate.
Please update the firmware to skip this if it’s not actually needed.
This has been discussed many times, it’s necessary, if you don’t want it you can relocate your printer, put your printer on a cement patio block to dampen the vibration, or you can disable it entirely from the control panel and then run it only when you want.
Sorry, I’ve only found a single thread regarding that. It wasn’t clear to me if that solution (removing some gcode) had side effects. I didn’t know it ended up in the Wiki, which makes it an “approved” method I guess.
I still don’t see a reason to do this every single print. The belt won’t suddenly get loose, it’s a slow process. That’s why I thought Bambu Lab might optimise this and only do it when needed (after X prints, days, whatever).
Anyway, that workaround would work for me, so thanks for that Wiki link. I might try the cement block thing at some point and see if it makes a difference.
I should say, while Bambu is saying it’s explicitly to check for loose belts, a lot of different mechanical failures would be picked up during this test, not just a belt failure.
Also check out the “hula” feet, they do a lot to decouple the printer from the surface it’s on.