I built my first printer couple of days ago. I started printing small models (20x20 mm max.) and everything was alright at first. However, when I tried to print a bit larger models, I started facing a problem. The nozzle keeps hitting the path of a previous layer or even current layer. That then causes jams, and the whole layer shifts 5-10 mm in the X or Y direction. I tried using different layer heights (from 0.08 mm to 0.44 mm), adjusting the speed of print but that did not help.