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puremoco

Lines on outer surface (Extrusion problem?)

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Hello,

I have a UM2 with Olssen Block and 0.4 nozzle.

Today I wanted to print a housing, which I already made a couple of times. But at this time, the quality of the surface is very very poor:

IMG_20160214_211355.thumb.jpg.3b2c8720f95e4b950b804e14cc1b63a6.jpg

IMG_20160214_211337.thumb.jpg.3444acd66c68d55d5bc1fb03914b1641.jpg

I use Simplify3D and Colorfabb PLA/PHA.

I did not make huge changes in the settings im comparison to the previous prints. No I wonder why the one looks this bad...

My first guess would be the filament "age". It was a 2.2 kg spool which I use since December 2015. So I might got wet due to the humidity in my room. But I do not hear any zips during printing....

I have already ordered a new spool, to see whether it is to blame on the filament quality.

Which other factors could lead to such bad surface?

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