I just recently got a printer, supposed to be a Prusa i3 Reprap clone. It came with Repetier firmware on it, and its previous owner had no idea about any calibration. I calibrated X-, Y-, and Z-axis along with the extruder, and now when I print a test cube it comes out with the right dimensions. But, the quality is horrible.
I'm printing with 30 mm/s speed as shells, 15 mm/s as infill, infill percentage is above 60 %. I've tried everything I can think of, including suffering a temperature tower (which came out just wrong). What am I missing?