Recommendation for motors and controller with rotating nut

[JAZZCNC]

I was also considering Lichuan Nema34 3Phase 220V 10N.m LC86H3129+LCDA2260H Closed loop steppper motor & drive from Ebay:
https://www.ebay.com/itm/17406540143...sAAOSwRmldpWft.
But is that overkill for rotating nut? They are pricy but were recommended by JAZZ in my other thread and elsewhere on forum. Also,I guess I wouldn't need such powerful motor for Z (it will be also belt driven 1:1, if not suggested otherwise).

These are the only motors I would fit on this machine, even though you are using rotating ball-nuts, you will need plenty of power to stop that gantry from high speed. Also, large motors like these need high voltage and these drives are mains powered so they spin fast and stop for very little. The slight extra cost will be well worth it believe me.

Regards the Z-axis then you will need a large motor if you are using an ATC spindle, the spindle alone will be close to 20Kg with the tool and holder. you will also need a brake on the Z-axis motor otherwise the spindle will fall under its own weight when motors are powered down.
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Also, if you plan on using dust extraction then you have to think about the dust hood and accessing tool holders in the tool rack, you need some way to raise the dust hood for tool changes. This is often done using pneumatic cylinders, so between the spindle and all these extra bits, the Z-axis gets heavy quickly so don't underestimate the motor size required.
For simplicity's sake then I would fit the same size motor as the X and Y axis, while they might be slightly overpowered they won't be by much and will be well on top of the job.

Regards the motion controller then the only one I would recommend if using ATC and definitely would be the best bang for your buck is the UC300ETH with UCBB breakout board using UCCNC software. I would stay away from Mach3, it's outdated and unsupported now, UCCNC is far far superior in every way now and cheaper.