I just gave it a shot, at 0.05mm, and I'm pretty happy with the result
This is one of the shoes of my character. because of the long, slightly curved point going upward at a very low angle, it was a good candidate, you could see the layers a lot at 0.1, like on the top of a sphere. In the end, it makes the other artifacts only more visible (especially the backslash echo) I had a raft built in the model.
I haven't had a need to go below .1mm but here's my guess:
1) bed levelling is super critical if the first layer is less than .1mm. I mean 1/8 of a turn of the screw is about .1mm so you have to have those 4 screws accurate to 1/16 of a turn now? Plus if you still have the acrylic bed - it tends to bow by .1mm easily. So you might need a more level surface and you might not want to use blue painter's tape either. All of this only affects the first layer. You might want to check "add raft" for this reason.
2) clogs/plugs. Cura has a "minimum" feed rate. I assume this is because of plugs but not sure. People have complained with the older hot end that heat slowly travels "up the solid filament" into the peek where if the PLA gets soft it can clog in the peek. I think this is only a problem with retractions maybe? Obviously with retraction you are transferring some heat upwards briefly, and then if you soon retract again, the heat can go up further as the previous retraction heated slightly higher parts of the filament and assembly. I don't know as I've never had this problem. However I know you can go much thinner than .1mm. Anyway you might want to print faster (over 100mm/sec) with thinner layers to avoid this problem? I don't know. I guess I would only print fast if I had ever gotten a clog in the first place.
Check out these tiny frogs - made at .1mm layer and with a .2mm nozzle which use only 1/3 of an inch of PLA! and most of that for the bed:
Link to post
Share on other sites