Dear all,
I'm trying to print a rather big part, nearly 13cm in diameter, 3 cm height, PLA. However, my UM2 fails to print even the very first layer. It starts pretty much okay, but it looks like with the matter of time the plastic line becomes thinner and thinner until UM2 stops extruding at all.
Temp 220C, print speed 40mm/sec, travel speed 40mm/sec, layers are 0.06mm
The feeding engine at some time starts clicking and the feeding gear jumps back (probably, to avoid grinding plastic).
Tried cleaning up the nozzle (by sequentual manual pushing of plastic at 220C then manual pulling at 90C), did not help.
Smaller parts (size around standard Ultimaker Bot) are printed okay.
Picture below, video of clicking feeder here.
Any advise is highly appreciated!