I print PLA and for the most part I don’t have a big problem with curling around the edges, usually a minor amount if that.
My last print, two of the same thing actually, has been an exception. A 2 1/4" round base 8mm thick with a relief in the middle and a boss on the top for mounting in a 4 jaw chuck. It is a glue chuck for mounting castings to be turned on a lathe. Confused yet. It is an experiment to see if it is viable to make one out of plastic. With the current insane price of metal it seemed like something to try instead of turning one out of aluminum.
All around the bottom it curled and pulled up off the bed but I think I know why so correct me if I’m wrong.
I needed this to be as strong as possible to resist crushing forces of the chuck jaws. So to this end I made the outside walls 9 layers thick, ya I know crazy but it is an experiment. My best guess is that all those layers caused the outside to shrink much more then the rest and caused the curling. I usually have the bed at 60C for the first layer and then 50C for the rest. If you have an other idea I would like to here it.
What is the best temp or the lowest temp that PLA could be printed at and would it be better at stopping curling by lowering the bed temp. below 50C.