Quote Originally Posted by Nicholas Seward View Post
The Z-resolution is okay in the worst case scenario. However, I have a trick up my sleeve to give me constant resolution. I will lay another scissor in the XY plane connected to one of the uprights. I will then be able to drive it as if I had a screw pointing in the Z direction.
It took me a little while to figure out exactly what you're proposing, but when I got it, my mind was blown a little.

Pretty good.