Sometime approx 25-30% of the way through printing a full plate of multiboard connectors, the Y-axis shifted by more than 1mm. No idea at all why.
Note, part in picture is turned on its side for the photo.
I can see some warping on the corners of your part that would cause the nozzle to encounter more resistance and causing skipped steps.
Could you share a bit more about the material used and also if you clean the build-plate? It might also be helpful to know if you used any type of adhesive.
1 Like
Warping not an issue. All pieces were well-adhered to the bed, had to be pried off. Bases are perfectly flat. I’m assuming any warping you see is lens distortion.
PolyTerra Black filament
Yes, plate was washed with soap and water, dried with clean paper towel, not touched with bare skin.
No adhesive used.
Addendum, did another print right after, no issues.
I can clearly see some warping on the edges of the part. Just to be sure, could you make another photo of the part with a flat object like a ruler close to the layers where the shift happened. Warping might not only result in edges being peeled off, it can also result in layers that might be getting higher in some spots (toward tension regions like corners) and building up to failure points where the nozzle gets caught.
This could be because of a flow rate thats set to high or a wrong flow dynamics setting, but are by far not the only causes. (I can see some signs of flow dynamics that are off on the corners of your print. Might be worth to run a calibration with Bambu Studio.)
Good to hear you had success with your second attempt!
I straight-edged (with a real straight edge) both x and Y on a handful of pieces, all were level.
1 Like
I mean, I can see the image, and I can see the top and bottom layers for as a reference for image distortions. I can definitely see warping layers. Especially on the left side of the model, right before the layer shifted. No clue how you would check that with a straight-edge.
OK, it’s kinda obvious you’re trying to force a theory at this point.
1 Like
Prove me wrong, or give me another point of failure.
If been running through quite some rolls of PolyTerra now and had the same thing happen one or two times.
But whatever, its not my issue… Interesting that you have “No idea at all why” this is happening.
1 Like
Shift during prints can come from a few things:
-
Print rods or rails need maintenance
-
Overlapping infill like grid or the part is warping
-
Travel speed too high or acceleration and the stepper driver or motor get too hot then they can skip steps.
-
You can try dropping the travel speed down and acceleration by 10 or 20% and see what happens.
-
You can also look at your preview screen and see what auto Z-hop is doing for the multi plate parts or use the normal z hop on this multi part print with your filament override settings.
My Bambu Lab A1 arrived yesterday and I made 2 prints of paint rack shelves (2 different files) - both of them printed with layers shifted at some point in Y-axis.
Y axis layer shift is just one of the print quality failures my bought the start of this month A1 is now having.
It’s never at the same point in a print, and it’s not grid infill related, or due to warping.
Got to be honest, the short lived “Bambu Experience” was lovely, but a touch too brief for me to be happy about. The machine’s gone from flawless and effortless to as dependable as an Ender 3.