Getting burnt blobs when trying to print a lithograph
 
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Getting burnt blobs when trying to print a lithograph  

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rjbram
(@rjbram)
Active Member
Getting burnt blobs when trying to print a lithograph

I've tried three times now to print a lithograph, and am getting sporadic blobs of burnt filament stuck to it. Using the stock nozzle, and PETG, 0.05 mm layer. I tried making sure the nozzle is clean, did a cold pull, and also tried dialing down the nozzle temp by 5 degrees. Now I notice that on the back (flat) side of the print, there is a definite pattern to the burnt blobs (more like a curving line) . In comparison, I tried printing a plain box with same outer dimensions and it comes out fine. Do you think this can be solved somehow? (- see pics - first pic is the plain box, second shows the back of three attempts). On the detail side, there are occasional burnt blobs, but not quite so similar in location

 

Posted : 16/07/2021 12:26 am
cwbullet
(@cwbullet)
Illustrious Member
photo

Can you post an image of you hotend with your nozzle in the photo?

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Chuck H
3D Printer Review Blog...
Posted : 16/07/2021 9:49 am
rjbram
(@rjbram)
Active Member
Topic starter answered:
nozzle picture

Thanks, here's a picture. hard to get a good angle on the shot, though, so may not be all that clear

Posted : 16/07/2021 10:12 pm
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