I got the screws and anti backlash nuts mounted on my new (to me) even smaller machine The end of last week. The mounting blocks were cut on my Mach 3 driven Taig. They are to adapt an old style MaxNC 5 to acme screws and anti backlash nuts.
The machine was assembled and hand tested Friday. I would have done a full test except I don't have an LPT port on the PC I planned to use to drive it. Oops. I got one ordered and I'll see how it works.
I tied it to my other computer today, and after making a recalculation to accomodate the screw pitch it seemed to work fine on a dry run of a helical cut. After playing with it and testing some things I mounted a temporary spindle on it and made a test cut. It worked fine. Now to start designing its permanet spindle. I plan to set it up with a redesign of my dual spindle mount, but I am playing with a couple ideas on how to zero the 2nd spindle to the 1st. When I get it figured out and built I'll post a video of it cutting two pieces at once.