Anyone have any idea what might cause this sort of issue on PLA? I run into it frequently, but pretty much only when all of the following points are true:
- the print has multiple parts, so the extruder spends a decent amount of time off of any given part (only one part from this print is pictured)
- the affected part(s), like the picture above, have a relatively steep outward overhang, extending over the build plate
- the outward overhang part is relatively narrow, as seen from a top view
This is from a printer with a 4028 fan (i.e. pretty massive airflow, server type fan) so even the 35-45% (based on layer time) I have it currently set at is more than 100% with single/dual 5015's or etc.
I guess my other option is to try supports, but this doesn't really seem like a situation where supports should be needed. Anyone ever had a similar problem and solved it without just turning the speed waaaayyyyyy down?
this looks like its warping from too much heat. you can try:
lowering temperatures, more cooling or slower printing
also is your bed leveled? sometimes this can happen because the extruder is too close on some points but not on others. from that angle it looks like its not warping evenly.
give us more details about your setup if you can, temps, printer type etc.