Change Filament Retraction at End of Job

[jamick0330 0]

I've noticed that at the end of a printing job on my Ultimaker 2 Extended the feeder is retracting the filament back too far. So the filament comes out of the top of the extruder. Because of the natural bend in the filament it's getting stuck on the top edge and the feeder gets hung up trying to push the filament back in when a new job starts. So I have to manually aim the filament back into the extruder before every job. This is a relatively new extruder (only a few printing hours, but the extruder nozzle is about a year old)

 

Is there a way to adjust the end gcode in Cura so the filament doesn't back out of the extruder too far? I'm a gcode noob. 

[jamick0330 0]

Update please? Has this post been approved by moderator?

[IRobertI 454]

1 hour ago, jamick0330 said:

Update please? Has this post been approved by moderator?

Yes it has been approved. Usually posts never get beyond a couple of hours old at most in the approval queue (depending on holidays, time zone glitches when moderators from different parts of the globe are around, people being busy with work etc).

 

How far is "too far"? Is this something that has started happening recently? Do you remember if you have changed anything lately that coincides with this starting to happen?

 

Sometimes when loading in new material it can get stuck on the transition between the bowden tube and the PTFE/TFM coupler but that can usually be remedied by cutting the filament at an angle. Just re-loading filament that has been retracted after a print shouldn't really pose a problem since it will already have a bit of a point to it. Is it possible that the bowden tube isn't seated fully all the way?

[jamick0330 0]

Thanks for your reply. Of course, as soon as I messaged about this, the problem has not reoccured. I have been cutting filament at angles and this is a fairly fresh reel. I just notice the filament has a natural bend coming off the reel and the bend stays through and out the tube so when the filament backs off after a job it can get stuck on the edge of the coupler. Sometimes I can steer in manually with a spatula or driver but this shouldn't be the norm. Again, the problem seems to have abated for now. I'll keep an eye on it. Thanks for the quick reply. 

[IRobertI 454]

You might want to have a look at the end of the bowden tube and check that it hasn't been cut at an angle causing it to form a gap between the coupler and bowden.