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Ok. I know about interface plate and machine base, and I am working on it.
And why never use two rails per side?
Aleksandar

Hello,
I plan to convert ooznest ox cnc machine with dual belts to linear rails. The machine is 500x750 mm, and I make PCB`s and some stuff of MDF. I like to mill aluminium max to 10 mm thickness...

What about PDMX-126 or Mk3/4 controller? What is, in you opinion better one?

Ok. Thanks John.
One more question. Regards that Leadshine DM856 has optoisolated inputs, which MACH3 breakout board is best solution to me?
I know that BOB`s with 74HC245 are not good solution...

John,
Thanks, I am match clear to this subject.
You are right about insulation resistance and temperature rise. However, dielectric strength is 500 V DC in 1 minute or 100Ohm, but max temperature...

Ok.
And what about torque at 70V and 36 V?

I am new here, and sorry for less knowledge about CNC electronics.
I recently bought 4 Nema23 step motors 0.9deg, 2.8A/phase, inductance 5.6mH/phase, nominal voltage 3.2V/phase, resistance 1.13...