I am building a Prusa i3 MK2 Clone and I am caught on this one. I have replaced the extruder with a MK8 adapted by myself to fit with most of the previous hardware from the E3D style extruder.
My current problem is that the nozzle appears to be dragging on the top of the layers. I can't tell if it's over extrusion or a layer height issue or what. I am testing by printing the 20mm calibration cube. The dimensions appear to be spot-on, but the layers start building up too much filament such that it just gets re-melted and shuffled around:
Anyone have a clue what this could be? Software, Hardware, Slic3r Settings?
I have: 0.5mm Nozzle Diameter. MK8 Direct Drive extruder.
Anything else you want to know?
--- UPDATE ---
Thanks everyone for your help. Turns out it was seriously over-extruding, like 3x what it should have been! I ran through this instructable: http://www.instructables.com/id/How-to-calibrate-the-Extruder-on-your-3d-Printer/ Which helped me with what I needed to do to fix the issue, but just re-flashed Marlin on the printer with the updated setting.
Here's the result! WAY better, I still have some z-wobbling issues but i think the frame just needs more support than it has now and that should fix up the slightly jagged corners.