Mine has failed again after I got the successful print yesterday.
i will try a power cycle and see what that does. (obviously thats one of the things that the Factory reset did earlier which begs the question did the factory reset do anything or was it the power cycle that did the trick?)
I've tested with 2 different print heads, bowden tubes and filfment feeder units with exactly the same results, so I gues this is something further up the chain like maybe the controller? maybe the controller is causing the print heads to lose heat after the job has been running for a few minutes and that causes the filament to stop feeding?