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Printing quality is so bad

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Posted · Printing quality is so bad

Hi, I'm UM2 user in Korea, so please understand even if you can't read my English.

My problem is bad output of UM2

I've used UM2 about 1 year, but I can't get anyting from my 3D printer.

Please watch these images :

20150907_000412.thumb.jpg.6532c2d7a467b630054948ffcae40206.jpg

20150907_000405.thumb.jpg.48c85ed3ff7c4cfe80c046935e58de8f.jpg

I've changed filament and nozzle(new) and PTEF coupler.

But It still doesn't work!

And I cleaned knuckle of extruder, and changed setting of filament diameter from 2.85mm to 2.95mm

How can I do more?

Please help me!

20150907_000412.thumb.jpg.6532c2d7a467b630054948ffcae40206.jpg

20150907_000405.thumb.jpg.48c85ed3ff7c4cfe80c046935e58de8f.jpg

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Posted (edited) · Printing quality is so bad

Some other user might help you more but for what I see the ptfe coupler and the metal part need 1mm space

https://ultimaker.com/en/community/view/9513-underextrusion-need-help-with-this-one#reply-84942

http://umgallery.ultimaker.com/uploads/gallery/album_27/sml_gallery_341_27_243635.png

Edited by Guest

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Posted · Printing quality is so bad

Think indeed you need to create 1 mm of distance between the PTFE and the Hot-end-isolator (metal part with holes). You do this by turning the hot-end-isolator. You may need the heat the nozzle a bit to be able to.

another thing, why did you change filament diameter to 2.95 ? is it because you actually use thicker filament? if so this can be a reason for under-extrusion due to higher friction in the bowden tube, you should better stick to 2.85 mm filament.

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Posted · Printing quality is so bad

True and also if he uses 2.85 but configures it to 2.95 it will push less filament making underextrusion as well.

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