Maybe you're noticing your extruder is feeling a little reluctant to print. You know it's not shy, because you've printed on it before, lots. But now it just refuses to move filament through to your build plate. It's possible you've got a jammed extruder.
Any 3D printer that uses an extrusion mechanism for binding layers together is unable to escape the curse of a reluctant extruder. Since you're using our Generation 2 extruder, it's unlikely that this happens often, but I'll provide you with information on the possible causes and some methods used to clear the nozzle. That way you can get back to printing all the things. :)
New Type or Experimental Filament
You decided to try some new printing material. While our G2 extruder can print a multitude of filament types, sometimes there are different parameters for materials. Review the manufacturer’s use specifications and confirm that you are following their recommendations.
Brand New Spool
Perhaps it’s the same filament you always use but a new spool of it. Occasionally filament will have debris that can build up inside the nozzle and cause blockage.
Methods to clear debris
The following are a couple of options you can try in order to clear out the debris. Please note all of these methods require the use of high heat, so PLEASE USE EXTREME CAUTION WHILE HANDLING ANYTHING HOT TO PREVENT INJURY (you know, generally a good rule to live by) k thanks.
The cold pull method:
Using a clear or translucent filament cut several long pieces as you'll need a fresh end each time. Warm the extruder to 220 or 230C. Push the filament through by hand as much as possible, try to get it to extrude all the way through. Then turn the heating off, depress the bearing leaver and rapidly pull out the filament. Repeat this action continuously pushing in a fresh section of filament by hand and rapidly pulling it out until the heat is reduced to ~70C or until the extruder no longer melting filament. You can inspect the melted pulled ends of the filament to see if there's debris mixed in. Once finished re-warm the extruder and test to see if it will push through smoothly.
High heat "melt it all! muahahaha" method:
Heat the extruder to 300C. Physically push the filament through the nozzle. It should push through smoothly with little or no resistance. If you find you really have to push or are met with what seems like inconsistent pressure you may need to use the music wire method to clear out the debris.
The music wire method:
We have an article that lives here that will explain how to do this and despite the example using our older plywood model Series 1, the method remains the same.
Lastly, if you feel like you need additional assistance, feel free to contact us here to speak to one of our specialists.