ABS filament sticking to extruder hot-end

[vansicek]

Any idea why the ABS filament constantly accumulates on the hot end extruder? It causes curling and accumulates in bunches on the print itself.

[marcom]

This is often due to overextrusion or oozing of some sort. You might want to try calibrating your extrusion multiplier and/or printing at a lower temp.