Fractal type additional material

[upsw 0]

Any tips chaps?

Its quite a pretty pattern but I cant understand why its doing it!

[badger 0]

I am seeing this on my UM2 as well. Looks very nice as errors go but not very useful. Hopefully someone has an idea what is causing it.

[IRobertI 521]

This is classic "stringing":

http://support.3dverkstan.se/article/23-a-visual-ultimaker-troubleshooting-guide#stringing

[stu_le_brew 42]

try increase travel speed to 250 and drop temp by 5-10 degrees, as it says in the article mentioned by IRobertI