Good morning everybody, First I would like to apologize for the title of this topic, it's hard for me to describe this problem with text, but I will post pictures I wanted to print this : So the few first printed line would be like this : So far so good ! But here is the result : Full resolution here : http://nicolasmazo.com/4.JPG My gcode is here : http://nicolasmazo.com/GBS.gcode I print with 3.0 mm PLA, speed 20%, Temperature : 210°, Buildplate 70°, Fan Speed 30%. Have you got any idea of what happened and how to fix it ? Thanks a lot !!