I'm designing a mobile robot which will have to draw some lines (straight and/or curly) on the floor while it moves. The floor will always be flat with almost no obstacles. The robot will have four wheels and its speed won't exceed 0.8 m/s.
I would like to receive some suggestions about the wheels: is it better to use omni or Mecanum wheels in this case? I know that both wheels have advantages and disadvantages (i.e., Mecanum wheels require more torque when you move sideways), but which one is suitable for this project?
Should I use a X-shape with the omni wheels to improve the accuracy while drawing the lines, or would the Mecanum wheels in a tank configuration be more suitable?