My Robo E4 3D printer is showing artifacts on one or both sides of the print. Or, my print is giving a non-smooth finish.

This can happen if you move your printer from one location to another. Due to the speed of the printer, the printer runs an automatic vibration calibration to counterbalance any vibrations on the location it was placed. If you move it, the amount of vibration the machine experiences while printing will change and the machine will need to be recalibrated to account for that. Go into Tools/Calibration. With both check boxes selected, click Start and the machine will auto-calibrate for you.

Even if you haven’t moved your printer, you will want to re-run the vibration calibration to see if it improves it. If it does not, try slowing down the print or printing a different file to see if that improves or changes your results.