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- #61
Polyterra PLA+PLA right? What is your nozzle temperature?
2 walls, 15% infill gyroidHow many walls and what infill percentage?
Not sure how much this will help as I wanted to see just how weak it was and pulled up on the separation that I pictured above. That said it was extremely weak up to about where the ramp meets the sidewall. The back half there is certainly an issue and what looks like the start of separation, but isn't just there yet:Can you take a couple close up pics of that thing where it separated?
I did check the Bambu Wiki and found this article about model interlayer cracking - https://wiki.bambulab.com/en/knowledge-sharing/common-print-quality-problem
Point 3 mentions excessive cooling. I had read PLA likes to be cooler, compared to other filaments. When I printed this second go round, I had the top mostly open (sitting on the AMS riser/stand) and left the door wide open. Part fan was 100% and the Aux fan I believe was set to 80%.
So after reading the wiki last night I decided to once again try to print this poop chute but this time only leave the top cracked and close the door. I also set the Aux fan to 60%..
This is the result:
Minus that little glob in the top right corner, a pretty flawless (to my dumb eye) piece.
The print looks to be printed pretty uniform with no other visible issues.
This "successful" print was done by changing the outer wall speed from 200 mm/s to 115 mm/s and the inner wall speed from 300 mm/s to 175 mm/s. I also changed (I think the layer height) from 0.28mm Extra Draft to 0.20mm Standard.