2m+ travel lengths with a ballscrew, using linear rail to support the ballnut

[Desertboy]

I think I need an experiment to test the validatity of supporting the ballscrew. The rail I'll have 1.4m 1605 ballscrew I can use with BK fittings have the carriages need a 1.5m length of rail hmm I might just buy another set of 15mm after all they can used for something interesting (Thinking CO2 laser cutter) and £120 is a bargain.

I have this clone rail on my gantry at moment and original Hiwin's on my Y axis I honestly cannot tell the difference between them except for the Hiwin's being like 4 times the price lol.

How fast can a nema spin? I suppose theirs no easy answer to that and going to depend a lot on inductance. Since 2 of the motors I use was recovered from other machines I have no idea of what their inductance or even nm is. I can only guess based on weight and chassis dimensions.

I'm going to budget £7k for the build I hope I can do it cheaper but I think £7k is realistic if I buy new.