Nozzle wear or other problem?

[kiwi76 0]

Hello,

I have an Ulitmaker now for a while and done quite a few prints but lately before every print I have to preheat the nozzle and then pull the filament out. Cut the first part off and then feed it back in to make the printer work.

also when I print I get a bit of overrun like the nozzle still extracting that I have to clean up.

My question is the nozzle to work and do I need to get a new nozzle and the little white part or is there another problem?

 

[illuminarti 18]

What happens if you don't do the remove-cut-reinsert routine that you describe? Have you tried just turning the extruder gear by hand, to push the filament through the nozzle?

 

[gr5 2,247]

1) UM1 or UM2

2) What happens if you don't cut the end off and put it back in?