Hello. I had an Ender 3 for 6 years and recently bought a Bambulab A1. I did the first calibrations and got good quality, but then I got this strange defect. The file is from Makerworld, and no one else had this defect. The belts are ok. no speed exceeds 150 mm/s and the main speeds are at 60 mm/s.
The lines seem to have shifted in x and y, for a height of 3mm. On one side the shift was inwards and on the other it was outwards. Does anyone know what it could be? Thanks.
I printed something similar in the last couple days on my also almost new a1. It didn’t have any issue like this, but it’s not the same file either. Could you link the file?
I don’t really see how that could happen physically unless the whole bed plate shifted then shifted back. Looks more like a slicer problem.
Good morning.
I have the .3mf that I used here. is attached. Attached I also have another photograph that clearly shows that in “A” the print was on the inside and on “B” it was on the outside. Thanks
A1+Poop+Bin.3mf (2.6 MB)
I sliced the file in bambu studio and it looks fine, so I really don’t know what could have happened. Is your printer on newest 1.04 firmware?
Something got stuck in a belt path, changed the length of that belt slightly, like something wrapped around one of the pulleys the belts run over/around. After a bit more printing, it fell out and the belt went back to the original “length” and the offset error went away.
Print it again, does it repeat?
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yes I have the latest firmware
I also think it was something physical that changed the movement…. I was trying to understand what kind of mechanical arrests happen with the A1. I haven’t printed it yet
The way the wall goes inward near your “A” and then outward near your “B” tells me there was an intermittent mechanical issue the caused the machine to operate out of square.
Make sure all the belts and idler bearings are looking clean with no bits of filament around to interfere with them.
I think if you simply print again this will go away.
Very strange… I made two more prints and the same thing happened (less accentuated) at another layer height. The height of the defect marked in black appears exactly the same, but now in a lower position. I made new impressions with the aim of keeping the impression firmly fixed to the base, so as not to have any doubts that this could be the problem.
