I built an i3-style printer (it started a few years ago as an Anet A8 and now I replaced basically everything). I've been printing some stuff that doesn't really need to have a good quality look or dimensional accuracy, but now I decided to print a calibration cube and the results are shown in the figure below.
Does anyone have any tips on improving the quality of this print? The height is exactly 20 mm but the width and length are affected by the uneven layers.
About the changes I made to the A8, basically I started with a steel frame but eventually all the electronics and mechanics were replaced to achieve something similar to the 3DSteel V2 from HTA3D.