First layer problem
Hi,
I have some problems with my MK3s printer.After i had successful prints for over a year suddenly i have problems with first layer.Whenever the head change direction the filament curl up and get stuck to the nozzle growing it to a blob.For this reason i cant print supports.Ive tried to wash the PEI with isopropyl alcohol, with acetone and with warm water and dish soap.I tried differently Live Z and hotend and bed temperature.Does anybody had this problem before? I have to ask before i disassembly the x-carrier , maybe the solution is much simpler.Thank You.
RE: First layer problem
I forgot to say that i have this problem with PLA and PETG.I use the presets for Generic PLA and PETG from PrusaSlicer.
RE: First layer problem
Wash, rinse dry. no ipa, no glue no hairspray... 
then set liveZ
https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-assembly-and-first-prints-troubleshooting/life-adjust-z-my-way/
test patch files at bottom of first post
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: First layer problem
Clean bed with dish soap.
Adjust your first layer, start to high and go lower in steps. Print a big flat square or a few square and check if it works.
On the pei sheet, if you go to low filament will release.(powder coated sheet needs to go a little lower).
Bed 10 degrees higher helps.
7x7 calibration in the printer settings is better then the default.
RE: First layer problem
I washed the PEI with hot water and dish soap (again 😀 ), but this time i used a dish sponge, i heated the hotend and used the needle from Prusa kit to clean the nozzle, although it came clean and now i can use my printer again.Thank you all for reply.