hi, i have a 3 axis extrak with the cantilever 3rd axis , i am thinking about installing an elrod machine style quill drive on it, my question is what is involved as far as electronics goes, will it work by just using the scale or do i have to have motor with encoder and another axis drive board in cabinet ?

my original motor and scale work fine just getting some wear in small ballscrew , but it uses the anilam glass scale for positioning and no encoder .

thanks
r brintle