Extruder motor noise


I’ve just switched to E3D v6 hotend and bowden setup on wanhao duplicator i3+.
ADVi3++ version 4.0.5

I’m having 2 problems with the extruder motor:

  1. It makes this loud buzzing noise which it didn’t before (https://drive.google.com/open?id=1-XYKDpoFHoJkT5S0hymzKSZ5U4M7qO-Z).
  2. Somewhere in the middle of the print it usually grinds on the filament and thus stops extruding.

I’ve calibrated E-steps in the software. Tried lowering the extrusion rate (gcode), prints get under-extruded, but this noise still persists.

Any help appreciated,
thanks in advance

As this a general problem with the printer and not ADVi3++, I move it into a more appropriate category.

It looks like a partially clocked nozzle.

I agree with the partially blocked nozzle.
The noise sounds like vibration but I can’t pick where it’s coming from.
Note, large are flat plats can make make small noises much bigger.
Try adding a rubber spacer between the extruder assembly and the frame.

Ok I think I got it, here’s what it was:

  1. Z steps were not calibrated right, so it was pushing all the time, but could not extrude as much as needed, eventually causing clog after some time. I’ve really cleaned the nozzle each time, that’s why it got me confised.
  2. As far for this buzzing f-king noise I think this extruder wheel was a little off, so filament was sliding against the plastic, see here: https://ibb.co/zVsKmsZ. I tightened up the screws and it kinda lowered the noise a bit.