Edge Deterioration
Hello! I'm trying to push PLA as fast as possible, but I'm getting some terrible corners on a speed tower long before the wall surface degrades (ignore the bottom warp which happened when I pulled it off the bed, and ignore the top most layers). I know the nozzle is moving much slower at the corners, but I'm not sure why it is deforming so much. Fan at 55% or 100% no effect. Temperature at 220 vs 235 (a bit worse).
5 Replies
I would adjust jerk to keep the printhead moving faster, but I understand that's bad for pressure advance. How can I improve these melty corners.
equal-aqua•17mo ago
Have you tuned your pressure advance?
Also might be overextruded, possibly connected
To my admittedly untrained eye I would say you're overextruded, by about 30-50%. But I could also be totally mistaken. I would tune extrusion, tune PA, then tune extrusion again just to make double extra sure.
I have tuned those, and if the speed is lower there is no issue. I'll double check extrustion, but it's definitely not that far off. I have redone PA, but maybe I need one closer to this speed. I'm not sure how speed sensitive PA is. Thank you for your help.
equal-aqua•17mo ago
Np, dunno if I'm telling you anything new from what I just said haha
I mean it looks to me like you're really over extruded, or there's a problem with cooling or something.
or PA
But for PA it'd need to be REALLY out of whack
Yeah, I think cooling is the most likely. Looks like each layer is getting placed a bit inside the last. Since this is a speed tower I'd expect the performance to degrade, but if it was cooling I would anticipate that it wouldn't be the corners that break first, since they are the slowest and get the most cooling time. Maybe I'll bring in a room fan and see if that diminishes the effect a bit.