Accurate Strong Gantry

[vargai]

Maybe It would be better to start again with the design spec to confirm what spindle and cutters will be used and go from there. :0)

I have changed the design and want to include the spindle being important( and heavy) part so the parameters:
3 kW motor + belt driven spindle with a later ATC option
Cutters "anything" that the motor can drive ( in plastic I can use 50 mm face mill :)
100-10000 rpm( so conventional machining range)
one option is AC motor +VFD -only the motor is 25 kg I know
other:s cheaper type servo motor or similar- designed for this purpose
I need some help in this subject to choose.
I made some searching but still have not find too much here.
Something I found on Blakburn's post but its reading is not aloud for small children.
So pls point it to if any is here
Thanks