A few months ago I took some tentative steps to begin the process of converting my RF-30 to CNC. I bought some SF1605 ball screws with ball nuts. These had no machined ends, just ball screw end to end. I also bought some NEMA 23 Steppers rated at 3 amps, 370 Oz In. I finally began work on in earnest on this project about a week ago. I made ball nut attachments to replace the lead screw nuts. I also machined down the ends of the (Hardened) ball screws with a carbide insert. And began making the machined extensions for the ball screws to fit my milling table ends.
Here's the original Y-axis lead screw nut and the attachment I made out of aluminum...
Attachment 208016
The new assembly shown in place on the underside of the Y-axis carriage...
Attachment 208018
And the machined extension added to the assembly...
Attachment 208020
With the ball nut attachment block...
Attachment 208022
And the assembly in place on the Mill / Drill...
Attachment 208024
Today I began work on the X-Axis ball screw machined extensions...
Attachment 208026
I have also today ordered a Gecko G540 4 axis stepper controller/driver.
Chuck