Bambu Lab A1 : How to tension belts

The x and y axis requires you to move it three times back and forth. The z axis only requires one time make sure to run calibrations afterwards.

[EnnTomi]

bro's printer just came back from afghanistan

[tbounds]

Thumbs up for quick and clear video I watched another video which was 25 minutes long and was only about tightening the x axis and he didn’t even mention having to move the X axis back and forth 3 times

[jcastro]

I get random layer shifts too! I noticed that the hotend had a lot of build up on it and removed the sock cleaned out the hotend and then it worked for a bit and bam layer shift. I just ordered new belts to replace the ones on my machine thinking the belts are slipping. I figured that I would try and re-tension the belts and give that a go, which is how I found your video. Thanks for sharing your video :) Let us know if you find that solution to your layer shift issue, good luck!

[balthaharis]

I thought my printer was dirty til i saw this lol

[mvandepeer]

Nice quick vid, thank you.
Also DO NOT USE WD-40. It is not a true lubricant. As a cnc machinist by trade I only recommend LPS 👍

[nickbutler]

I have just unboxed and set my new A1 up (17/04/2025). It immediately failed calibration tests. I ended up have to retension all 3 belts before I could even think about printing. Not at all what I'd expect from a factory fresh machine. I'm glad I got the Mini first, apart from lubricating the rails it has been a printing dream. I only hope the A1 will do likewise, after the teething troubles.

[DG-mimc]

Why has this printer been on the bottom of a lake😂😂😂

[alastair]

Where did you add tension to the belts? - I must have missed it, you loosen the screws, and move the item (plate, head, etc) 3 times and then tighten the screws.... what part of that tightened the belt? - thanks!

[Underpntz_Gaming_Channel]

dude WTF is WRONG with your printbed? did you put acid on it? but getting back on tensioning the belts... i wonder if this really helps... i know its in their manual seems like its spring load/tensioned but the belt just feel the same like before it was "tensioned". i rather had just a screw to tension it by hand.

[JMLRecording]

Woa, can you tell us how your yearned got obliterated so we can avoid the same fate? That’s insane

[LynnsD_PrintingStudio]

Ever clean your printer that bed looks like it has been through a WAR! The Bambu Lab instructions say DO NOT USE WD-40!

[nickademuss]

WD 40 isnt a lubricant, its a WATER DISPLACER, good if you want to clean the old grease off and leave bare metal. Its also good at removing stickers, bad at doing much else.

[Arpatube]

Ty for the video. Can you do a a1 mini video please?

[TheLifeWorthLiving]

Appreciate your video dude, helped me out... did you ever figure out what was causing your layer shift?

[dosdont]

Yes looking forward to A1 Mini explanation. I'm having some z lines that I can't figure out on it.

[redherring]

Wd40 is a cleaner, you use wd40 to clean the rails and then lube after, with lubricant. Not wd40

[porkhunts]

That didn't explain anything about tensioning belts FFS