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Can't get my UM2 to print after filament ran out

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Hello Everyone,

 

I'm having an issue with my Ultimaker 2. I had a print running that quoted 21 hours to finish. About 1/3 of the way through, the filament ran out and I did not catch it. So it continued to "print" for about 14 hours with no filament running through the nozzle.

 

Since then, I cannot get the printer to print. The filament will not stick to the plate on the first layer.

 

I've done several Atomic Method cleanings in the nozzle, i've releveled the build plate several times, and reinstalled the filament a number of times as well.

 

Below you can see a video of a print attempt that I just made. This is with stick glue on the build plate. I've tried a few different glues and also a clean plate without any luck.

I also had to increase the temperature of the nozzle to 230C for PLA. It was set at 210C prior to the incident; but after, filament would not extrude at that temperature.

 

Any tips or suggestions on how to proceed?

IMG_2628.m4v.zip

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The filament is coming out of the nozzle just fine.  You don't need to do cold pulls.

 

What I see in the video is exactly what you expect when the leveling is too high.  Just run the leveling again.  Or don't even do that - just turn the 3 screws CCW as seen from below about a half turn to raise the bed up a bit.  You can play with these as it's printing.  Or you can push up on the bed to see that I'm right for a few seconds.  I demonstrate this at about 3:14 in this video:

 

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On 9/28/2018 at 9:59 PM, gr5 said:

The filament is coming out of the nozzle just fine.  You don't need to do cold pulls.

 

What I see in the video is exactly what you expect when the leveling is too high.  Just run the leveling again.  Or don't even do that - just turn the 3 screws CCW as seen from below about a half turn to raise the bed up a bit.  You can play with these as it's printing.  Or you can push up on the bed to see that I'm right for a few seconds.  I demonstrate this at about 3:14 in this video:

 

 

I tried moving the build plate closer to the hot end and it helped a little. However, the filament feeder is just gnarling up the filament rather than feeding it through. 

I've already increased the temperature to 230C. Does it need to be even hotter? Did running out filament maybe destroy the hot end somehow, causing it not to heat as well as before?

 

What should I do?

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In your video the extruder is working great - it's extruding lots of filament.  So I'm a bit confused.  Maybe your video should have shown what's going on at the extruder instead?  Is this a UM2 with the black feeder?  Or a UM2+ with the white feeder?  Or something else?

 

Is it grinding on the very first layer or only later on?

 

I suppose your steps/mm may be off for the extruder.  Try putting the filament half way down the bowden, then use the MOVE command to move the filament exactly 100mm and measure how far it moved.  It may be extruding at 2X or so the nominal rate.  That would cause it to extrude nicely and also grind up the filament at the same time.

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