back motor problem

[trganet 0]

Hi

i have a problem with transporting filament. Back motor skip forwarding filament. I try to clean nozzle, try to set spring on back,...

please watch this video:

 

[gr5 898]

This is normal. It happens when the pressure in the print head is too high and the force to push on the filament exceeds about 5Kg.

What is happening at the nozzle during this time? Perhaps you are printing the first layer and the nozzle is too close to the bed and there is no room for the filament to come out?

Or maybe the nozzle is clogged? Or the filament is stuck on something inside the print head?