Layer shifting

Bambu Lab X1 Series
1

Hi All,

I was printing an Aux fan saver: ( Printables) in PETG. (Extrudr XPETG MATT black).
Nozzle temp 245, bed temp 70 degree. 0.20mm Standard.
First layer 50mm/s, outer wall 200 mm/s, inner wall 300 mm/s.
Wall loops 5

When the print was done I did see a layer shifting. See picture.
What did I do wrong?

IMG_7476
IMG_74761920×1440 207 KB

2 Likes
2

If you ever figure it out, let us all know. I printed a small forest of tall, skinny cribbage pegs (200% normal size) in standard mode and was so impressed that they printed! Then I noticed the layer shift. Eeeesh. Eyeballing it, I’d say it was at about the same layer as your pic. Standard PLA. They all went in the bin. A damned waste.

3

I have no idea what went wrong. I sliced it again with the same settings with bambu lab slicer. There was no layer shift visible in the software. I printed it again with the same settings, but now with 4 wall lines instead of 5. The print is successfully printed. Really strange.

4

I’m getting exactly the same problem. Massive layer shify for no reason early on

5

Try the following:

  1. Retension the belts:
    Belt tensioning procedure | Bambu Lab Wiki
  2. For the infill use Gyroid pattern
  3. It already looks like you are using a brim which is good
  4. The model looks top heavy. Is it possible to use support? If so, could you add it and then retry it?

Please try all 4 and your part should print. I had to do the above when I had a part that was top heavy like yours.

6

This looks like the belts skipped maybe? I would definitely check their tension before printing anything else.

Check if the layers shifted on a travel move or on an extrusion, in other words: is it completely cleanly split or is there a string somewhere attaching the two shifted layers?
What accelerations were you using? Was jerk control enabled or just the basic settings?

7

Just wanted to come and give everyone here some help if this is happening to them: check out my layer shift. It’s about 1mm in both x and y, but only one random spot. This has happened twice now and it’s being combined with plastic clogging in the poop chute. I believe the plastic has hooked the extruder/nozzle assembly head and caused it to get knocked out of place. It’s never done this before but now it’s getting clogged, I think it must be too hot during the filament changeover because it keeps clogging the poop chute and causing thick blobs.

I’m not sure if I changed the settings on this one, I may have made it hotter by accident. I also recently moved the machines into my garage, which we live in Florida and it’s summer. It went from 72 degrees F inside to 85-90 degrees F in the garage. Fixing the heat problem will almost 100% fix the chute clogging and thus any layer shift caused by it during changeover
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Oh and fyi, blue Sunlu PLA+ is not as strong as black Sunlu PLA+…