Hello.
I have an old mill about 3ton with 1m X axis
that has X dovetail ways and 32mm leadscrew that
is fixed with rotating bronze nut.
Motion to all 3 axes are given by one 2kw 1000rpm dc brushed motor
by engaging each axis to motor via gears train clutched by 3 electromangets
so each time only 1 axis can move.
I want to convert this machine to cnc with 3 ballscrews and 3 servomotors.
For X axis leadscrew length is 1400mm 32mm diameter.
because replacement 32mm ballscrew is a bit costy can i use 25mm ballscrew?
Also what pitch 5m or 10mm? Rotating ballnut design or rotating ballscrew?
I have a servomotor 500w 800rpm(is 8000rpm with 1:10 backlash free reducer) is this power enough or need something more powerfull ?

In the photos shown is how it is originally and the last machine
is the same machine retrofited to cnc by 3 ballscrews and 3 servomotors but i can't understand
from that photo how X axis ballscrew and motor mounted.. Is it rotating ballscrew or ballnut?
Can understand someone from photo how X axis ballscrew-servomotor is mounted?
Thank you.