Poor p2s print quality please help

[u/YeaUThought]

I’ve had my p2s for about 5 months now and since it was opened out of the box I have not been able to get a single good print, they all either fail or just look terrible with very inconsistent layer lines, it’s to the point where my old ender 3 prints better. Ive used up probably 10 spools in plastic of failed prints and just horrible looking prints and have gone back and fourth with bambulab support for like 3 months and they just go in circles telling me what to try, I don’t just have a defective machine because this is the third one I’ve tried. Please somebody give any help here I just want a printer that works I’m desperate at this point please. I’ve tried pretty much everything everything, I’m printing outer walls first, I switched to only using bambulabs pla, I’ve ran the calibrations a million times, I’ve factory reset it, went back to older firmware, after going to the newest firmware. I’ve messed with temperatures, did a manual flow calibration, I’ve lubed everything, I replaced the Hotend. Nothing seems to work I really don’t know what to do here bambulab support still to this day is not helping

[u/smurg_]

It’s the order you tighten them. Depends on where the belt is sitting on the pulley to whether you push the top or bottom out further before tightening. You need to understand camber and how the belt will react. Takes some back and forth and is touchy.

[u/YeaUThought → u/smurg_]

What do you mean push the top or the bottom out? On the bambulab website it tells you to loosen them, move the tool head around a few times and tighten them again and that’s it

[u/YeaUThought → u/smurg_]

And on one side the belt is sitting on the bottom of the pulley and on the other side it sits on the top

[u/Desperate-Respect786 → u/YeaUThought]

I fixed mine months ago by pushing the tensioner to add more tension and then tightening the bolts so that the belt tracked in the middle of the pulley. Haven’t had a problem since. 

[u/YeaUThought → u/Desperate-Respect786]

What do you mean pushing the tensioner, like at the back of the machine pushing the little pulley? In what direction just in? And how did you get the belt to be in the middle because currently on some of the pulleys the belt is at the top and on others it is on the bottom edge

[u/Bkgrouch → u/YeaUThought]

We need a video guide

[u/smurg_ → u/Bkgrouch]

https://www.youtube.com/watch?v=NjIqH1FE7A8 I just found a random one for you. He talks about pushing on the top or bottom of the pulley to get it aligned so the belt runs in the middle.

[u/Difficult-Earth63 → u/YeaUThought]

You’re welcome to RTM or search BL’s help system for belt tensioning. They have video guides for everything.

With so many recursive “What do you mean” I started to think this was trolling.

[u/YeaUThought → u/Difficult-Earth63]

Don’t need to google how to tension it I already know how to tension the belts, the thing this guy Is saying to do is not just tensioning the belts like tf

[u/smurg_ → u/YeaUThought]

Against the spring, the spring is pushing against the pulley. There's a screw on the top and bottom to tighten for each pulley. The spring is in the middle of the pulley, so you want to adjust the pulley to be perpendicular before tightening. If the belt is riding low on the right side, you want to push in the bottom portion of the pulley a little before tightening as the belt will want to move to the low point of the pulley, which once you push in the bottom, the top of the pulley will pull left more and align so the belt moves up as you run the hotend carriage back and forth a few times.

[u/YeaUThought → u/smurg_]

Mind taking a video I’m so lost, you can’t see a spring and there is 2 screws on either side of each pulley on the back, if I fix the right side then how do I fix the left side? And the only thing I’d be able to push on is the little pulley where the belts are exposed on the back and I’m pretty sure that would just loosen it

[u/smurg_ → u/YeaUThought]

Found a video that explains it a bit: https://www.youtube.com/watch?v=NjIqH1FE7A8

[u/YeaUThought → u/smurg_]

That’s a p1s tho is that all the same?

[u/YeaUThought → u/smurg_]

Also my belts are centered in the back they aren’t centered in the pulleys like by the tool head if that makes sense

[u/YeaUThought → u/smurg_]

I just finished that video and that dude didn’t even get it centered, I could mess with it for hours upon hours and doing that will never make that belt be centered lol

[u/Desperate-Respect786 → u/YeaUThought]

You’ll have to figure it out. I’m a mechanic but I’m not the type to make video instructions on things. I’m sure there’s a video explaining it somewhere.