I'm getting an under-extrusion print failure at a similar place in a particular piece, while other pieces have printed normally. I understand that two primary reasons for under-extrusion are clogging in the printhead or deformation of the ptfe coupler, but the way this print job fails only after over an hour of correct printing, but always before two hours, doesn't seem to match up with either possibility.
https://www.dropbox.com/s/ig5tdwh308g1lnd/20160615_120430.jpg?dl=0
Ultimaker2
Cura 15.04.5
I'm using pretty standard settings for PLA 210/70 degrees and rather slowly 40 mm/sec, 0.1 mm layer and 0.4 mm nozzle.
Any thoughts appreciated, thanks.