Hi guys,i don't know why i AM not able to print with my um2,it seems like if it wasn't able to extrude enough material,and i print at 50 Speed,0.2 layer, 1.2 shell thichness and 150 of travel Speed,temperature 210,with eumakers pla.i have just changes the ptfe Because i tought that that was the problem but nothing changed....in the pitture is shown the problem....help me please!:(