I have some very consistent issues with warping when printing ASA/ABS, which is really annoying since I’m trying to print my voron parts. It’s not warping massively, but enough to mess things up.
I print with these general settings, on a textured PEI flex-plate.
- heated chamber @ 45-47C (can’t go much higher)
- bed temp @105C
- first layer 255C, other layers 245C
- fan off, unless it’s an overhang >=50% or layer time is <10s. Fan maxes out @70% unless bridging.
- speed 200/120 mm/s inner/outer walls
- first layer 50mm/s, 80mm/s infill
I’ve tried both with my regular Z-offset which creates a good uniform first layer, and slightly lower to kind of push it more on to the plate (but worse looking)
- I’ve cleaned the plate with pure IPA
- I’ve tried glue stick
- I’ve tried brim both skirts/mouse ears, which help but don’t eliminate it. (5mm, 0.15mm space)
ABS seems to be a little easier to print than the ASA. I’m using filament from Polymaker
I had an issue I caught early when I swapped my prusa from a Rambo to an skr mini, used the same power wires which didn’t have ferrules, I got “lucky” that the power supply shut itself down, one wire had worked itself a bit loose, enough to potentially arc.
I’ve replaced everything with new 14 awg wire with solid ferrules and I inspect semi regularly, I trust my crimps here but I don’t mess around with potential fire hazards. I think there’s a tendency to think, oh it’s low voltage, it’s fine, but there’s a lot of energy going through those wires, treat it with the same respect you would mains power. Take your time, double check everything, and invest in good crimping tools.