Filament not coming out nozzle during print

[champsteve778 1]

Hey simple problem today

 

The filament not coming out nozzle during print

 

What are the problem / solutions?

 

Steve

[Slashee_the_Cow 410]

Hiya! As your Friendly Assistant Moderator Slashee I'm going to be generous and move this to the "Improve your 3D prints" board since it almost certainly isn't a problem with Cura, especially if you try printing files which have been successful in the past.

 

(Disclaimer: there's probably more instructional resources for these techniques than my brief ramblings, so look them up if you're going to try them)

Unfortunately this problem isn't necessarily as simple as you might hope it is. The most common cause is a clog somewhere - if you're lucky this can be as easy as:

• Heating the hot end up and sticking a nozzle cleaner up the nozzle
• Replacing the nozzle
• Remove Bowden tubing (if applicable) and see if there's a clog, exhibit A:
  
  If so, cut off the end of the tube (and cut it as straight as possible, the end needs to be flat) and stick it back in
• Heat the printer up, unload the printer, disconnecting the Bowden tube (if applicable), then got the hot end nice and hot (I usually go about 245°) and pushing a wire (somewhere around the diameter of filament - if you any wire coat hangers laying around, they can be sort of close, but some are too thick, some printers come with a tool specifically designed for it) and pushing it down into the print head, this force a clog in the hot end out through the nozzle.
• There's also a cold pull - I've never actually tried that one myself.

On the other extreme of the spectrum there's things like "extruder broke" (try heating up the hot end and getting the printer to retract the filament to test).

 

Other that... this is really more of a @GregValiant question.

[gr5 2,224]

What model printer?  Has it ever worked?  Is it new?  Used?  What kind of filament?