[Klox]

While you guys are putting heads together for this CNC conversion for JKIER one thing bugs me. I too have a mill/drill like this in my workshop, it belongs to my uncle.
How are you guys going to facilitate Z-axis movement? The reason why Bugs Bunny tramples on my brain is: When adjusting the head on these type of mill/drill machines it rotates a bit, if i am drilling holes for example i set the machine up so that i would not need to adjust the height while drilling (only quill travel). Some of these machines got a rail that keeps the head in alignment (not up to toolmaking tolerances), but some (like my uncle's) do not.
Was just wondering........

Klox