Alfawise U20 Dual Z Axis

https://www.youtube.com/watch?v=14uteQvmNx4

This modification for the Alfawise U20, reduces or eliminates several problems:

** 1.- First layer difference ** between the left and right part of the X axis, when the Z axis is raised, especially in the first layers. Normally in this type of printers where in elevation push Z, is only made from the left side of X, tend to leave something behind the right side of X, because this side will tow that thrust.

** 2.- Wobble, Banding or Jitter, **