Same as this here for me. The tape adds ever so slightly to the pulley diameter which will compress the tensioning springs slightly more which means the belts are every so slightly tighter which will ever so slightly affect the resonant frequencies.
The variation in belt tension between any two executions will be less than the change in tension for adding a few wraps of teflon.
about to give up on the VFA on my p1p. I only print PETG and the quality this machine makes is disappointing, not to mention the amount of time and filament I waste with Bambu support and days and days waiting for responses. I am over 1 month now on a unit that never worked well since I bought it and I am just about to throw in the towel on the XY bambu system.
Print using a much slower external perimeter speed. I find that the stepper noise artefacts are more tolerable compared to belt rippling artefacts that you see there , so I print petg and silk with 35mm/sec external wall speed.
Tried all speeds. Slower in fact, is when this printer does the absolute worse, especially for the outside perimeter.
Got any pictures of the slow printing ones?
I see slight ringing on the corner which isn’t too abnormal on shiny plastic, but you have considerable VFA as well. Have you tried adding tape to the pulleys?
I have ordered new Gates belt because my friend and I have a suspicion the belt that came on our printers is to blame for not being straight cut and thus riding up and down pulleys which also helps explain why it shows up more at certain Y positions in the build envelope.
My P1S is doing this and even at 200MM/s im seeing it appear in my prints which is driving me absolutely insane. I dont really see it much on the Y axis but it is super prevalent on the x. ive tried only barely tightening the belts or having them tight had cleaned the ■■■■ out of the rods and nothing seems to actually work
That is the exact problem. If you measure it you’ll find it is 2mm on the X axis and on 45 degree diagonals it will be just under 3mm. If it doesn’t disappear or at least significant reduce by 200mm/s then yours is around as bad as mine is. Crazy that Bambu does not consider this a problem!
Check the above thread for instructions on a DIY bandaid that will greatly improve the issue even if it does not fix it, and does not ultimately address the cause of the problem.
I have this as well. My xc1 is only a week old though.
Does everyone have this or is it just being unlucky?
Considering returning mine.
Anything above 160 gets a little better but, printing under 160 looks terrible. My X-axis is the worst. My Y axis above 160 is alright can still see it but could live with it. If i print on and angle like oneill8902’s picture its bad on all sides.
Wondering if I should try the teflon trick? Can you get it off at all without cutting? if not probably not worth trying if i return.
Not everyone has it enough to matter. The newest machines have it less often, but literally all have it to some degree. So I would say just unlucky.
The issue with normal belt tension peaks around 120-130mm/s. Below and above that it will improve. It appears mostly on the X axis because the X-axis has movement across the final smooth pulleys. If you slowly move the toolhead left and right with power to motors cut you can feel it camming back and forth as the teeth pass over the pulleys. On diagonals it moves the X-axis still, but because it is also moving in Y, you get the same artifact stretched out on the hypotenuse of a 1:1 triangle.
Yes, but it is pretty tedious to do. Using a sharp plastic tool like a shattered piece of acrylic makes it easier to do without damaging the pulley. Even then it still takes some time to get off every shred. Since yours is new and under warranty, I would try to get it replaced.
Thanks for your reply.
I have lodged a ticket, ill see what bambu say.
Most of my prints are black and grey and they are more pronounced.
thank you for the replies.
I have spent WEEKS on this issue with Bambu. If you try to talk about this subject on the Facebook page you get stoned by fanboys.
Last update from support was today, after they claimed support is working hard to find a solution, all of the sudden the error is user error and I need to tune my filament to make this go away.
Well, I am not impressed to say the least. Not too happy with support but worse is that now I have to deal with this printer that seems to be useless for anything other than PLA.
I am contemplating cancelling my A1 order and take my business to Prusa. Sure older tech and slower machine, but I think I might be better in the long run.
one of my belt does ride up and down but only partially as the extruder approaches the front of the machine.
But really to be honest, I am really not interested in doing any more tweaking on this machine, I think I am done here… If Bambu engineers have not figured this out, how would I?
Yikes, that is pretty bad… on my old printers I would deliberately throw things in at 45 degrees because it allowed both belts to absorb and reduce ringing. That ends up being worse in these printers because it just makes the issue all around. On my printer is is poor in X, almost non-existent in Y, and is worse at the back of the build plate than the front.
Support runaround was my experience on this issue as well. It was all - print faster, run the tensioning, it is your filament not being calibrated, you need to clean and lubricate, etc etc. I got them to admit it might be a problem with the mechanical system but they were basically like A: I do not know it will fix it and B: You are out of warranty. The issue had been there since day 1 and I just didn’t recognize it until I started printing large transparent objects.
I have had mostly good experiences with their support barring this and the fact they told me to spend $40 on an AMS feeder funnel when it was not actually the problem and I had to resolve it on my own. I think they started out really strong and then got too saturated - too many users asking for help on a system which had an established reputation and justified giving slack lazy answers and denying responsibility.
I still have not had a better printer. My other ones certainly have had their share of problems, and the Bambu is no different. It requires troubleshooting just as much as other platforms, though given the greater complexity not as bad as it could be. I would definitely be willing to buy another Bambu myself, despite this, but I would probably go P1 not X1 because once you start trying to do any maintenance the panels are a hindrance.
What are the odds they knew the issue existed but that fixing it in a reliable way would be too costly and would bring up the idea of doing recall repair on existing machines? IMO, they knew but were required to keep it under the rug to avoid complications. If I can figure out the source and a fix by a process of elimination, then with their resources I am certain they could do better than I did.
My A1 just shipped. Just when I was thinking of cancelling.
Will print a few things then, if no ringing the p1p goes out the door and prusa is in.
That said, have you solved ringing in yours???
How are people putting uo with this, print quality is prettty bad
Wondering if I send it back and possibly get another, whether it would be any better.
Yeah that’s weird mine is worse on the back of the build plate as well.
Does yours or others look anything like that on 45deg? I’m guess mine is just bad but have nothing to compare it against really.
My mk4 prints way better with no vfa but love ease of use with bambu and ams. I was going to get rid of the mk4 but now I dunno.
I wouldn’t say I solved it, but I got it to a level it is not worse than other Bambus I guess. I am not totally satisfied but I also have no choice this late. I also have some ideas on fixing it more permanently, but it require getting more invasive than I have so far.
Yeah, mine looked exactly like that on the 45 before the mod. Check out some of the pictures way earlier in this thread to get an idea of where I started.
