ill try to explain this the best I can:
i bought a Taz6 around a month ago.
everything was perfect. until today, right after printing an object. The Z axis started to misbehave.
the extruder unit cannot go up or down. the z axis motors do not move smoothly. they vibrate a lot and turn very erratically.
and most of the time do not move.
I tried aligning the 2 Z axis sides manually by turning the motors after disabling the steppers, that helps for a couple of seconds and then it went back to not working.
i am not sure what else i need to do.
here are 2 videos of whats going on: