Under extrusion problem

[Paoloboni 0]

I've set all the default parameter in cura but still have under extrusion problem like in the photo..what can i  do?(i'm printing original PLA 2.85)

Edited September 6, 2015 by Guest

[Labern 775]

Have a look at THIS guide. if you still have problems after going through the steps then report back.

[puremoco 15]

How many hours of printing does your print have? After ~500h my teflon insulator was deformed and caused heavy underextrusion. Changing to the Olssen block (whole hot-end) solved the problem and now I can print fast again

[sproutdesign 5]

Hi had exactly this problem and after trying everything else I disassembled the print head and removed the teflon isolator. I compared it to a new spare I have and found that the hole had grown significantly, which explained the backflow I was seeing when doing the atomic pull cleaning method. Replacing with the new teflon insulator instantly solved the problem and I'm now printing perfectly at full speed. Worth remembering these are consumable, especially if printing hotter materials like co-polyester, and that Olson also has an insulating washer (isolator) you can add under the teflon part to reduce the rate of deformation.