What is not to love more than getting an upgrade like this to your Shapeoko, especially if it consist on a brand new, heavy duty and well designed Z contraption. Something easy to install and put to work, you follow the instructions, select the right tab in the settings and voila everything has been thought for you and everything works.
Just a little detail, all the holes with treaded inserts that you carefully calculated to be at the same distance to each other on your waste board, even across the aluminum rails and all gravitating around the center that some people call 0, all the jigs you made to synchronize two faces work, also based on the Cartesian center of the machine, are scrapped.
You are not a programmer, but you thought that they knew everything and everything was calculated for you, they said: don’t initialize the machine, go to setting and select the right hardware from the list and don’t forget to click on the “send config data”.
Well there is a little inconvenient, the new center of your Shapeoko universe is +/- 4mm toward the minus X and 30mm toward +Y.
All your treaded holes and jigs do not work anymore.
But, don’t worry there is now enough oil on your board and stock to fry your dinner.
The HDZ is narrower than the stock axis or Z-Plus — this affords greater movement along X (unless one is using a dust shoe option which makes the carriage wider). It is also thicker than at least the stock Z.
This necessarily alters the relationships of the carriage to the bed resulting in some shifts — remember, the machine origin is set relative to the top right edges of the carriage, and the back edge of the gantry — the actual endmill position is then an offset from that based on the geometry of the parts. I wrote a little bit about this at: