First layer problems with PCTG - need some help figuring this out!
Hi all!
I've got a Prusa i3 MK3, which prints PLA perfectly, and I had pretty good success with Prusa PETG. I'm trying 3D-Fuel Pro PCTG, and the first layer is always junk. It seems to be sticking to the nozzle a bit. See the attached picture.
Prusa slicer settings: 0.2mm layer, nozzle 240/250 C (first layer/others), 85/90 C bed. 20mm/s first layer, 45 mm/s second layers. 3D fuel says: 50-500 mm/s, 250-270C, 70-85C.
I've tried changing speeds...temps...adjusting the z..cold pulls. Maybe I'm not hitting the magic combination for PCTG. Any advice?
RE: First layer problems with PCTG - need some help figuring this out!
Well, after messing with it some more, this may just have been the nozzle being too low! I'm getting better results with it a little higher. -1.270 was bad; -1.225 seemed better. It has to be slow enough for it to stick, like 25mm/s first layer.