Problems with PLA first layer
I am printing for someone with Makerfill PLA, I normally use NGen these days. I have had a lot of problems with the first layer not sticking. I recalibrated my I3 and even lowered speed to 80%. Problem is these boxes with logo are printed face down. What is the reason I get rough patches in the surface? Is it nozzle too close or far ? I have trouble finding optimal setting where surface is smooth. I also tried the calibration patches elsewhere on this forum. Now also cleaned my steel sheet before next print.