Johngear

Hey, Can anyone give me some tips on how to improve my prints on the ultimaker 2? Since I bought it I have been using the Marvin model (http://www.thingiverse.com/thing:215703), and I keep getting low quality prints as shown in the picture below. Here I’m using the colorfabb copper filament and the filament which came with the 3d printer. Would appreciate it if someone could give me some tips