Finally made the jump to the lulzbot family after having my Afinia H479 printer for 2 years as beginner printer.
I just recently bought a taz 4 from I-T works and spent 2 days just overall inspecting the entire unit. Everything looks solid and I took the time to verify that all the screws were tight and belt tension was good. The issue I ran into is when I first did an extrusion test, the filament would extrude then stop then extrude and stop. This repeats multiple times. The feed gear is full of grinded up filament and I noticed that the idler bearing is not rotating freely, it takes some effort to actually rotate it. I adjusted the tension slowly to see if the bearing will rotate and it did not. it seems to be causing a friction to the filament as the feed gear is rotating causing some extrusion issue. It looks like the bearing is on that plastic piece very well and I am unable to move it. Anyone have any suggestions on how to resolve this issue?
I removed the tensioner and applied a little bit of downward force into the extruder as it was going its print calibration and it printed perfectly. now I just need to resolve this little hiccup.