Hi,
Here is a video about 3mm on UM2.
https://www.dropbox.com/s/utonmgx4maalsde/20140512_121312.mp4
What setting would you recomend to prevent the "turn back" at the back, because it can damage filament and get stuck, then no extrusion anymore :(
What settings would be ok ?
Best regards, thx for help !