[MicFarlow]

Honestly. You will get nowhere with those motors. Search around about the 1600 / 1700oz ebay apedials and you will find out.
Mine went where it belonged....... in the bin!!!
If you have gear reduction , why does the machine need so much torque?.

My 1600oz was on a mill head Z axis. I just swapped to a 1080oz smaller 34 motor. (straight swap).
This is the best advice I can give. Although yes it doubled my speed as soon as I changed it, I'm still a little disappointed.

However, the new 1080oz does react to a voltage increase.
I'm using a 1080oz nema34 (ebay) with this DM860T:
https://www.aliexpress.com/item/3286...86741310%22%7D
on this 80v:
https://www.aliexpress.com/item/32818208276.html?spm=a2g0s.9042311.0.0.27424c4dnCK 9hf
You can choose psu upto 110vdc here:
https://www.aliexpress.com/item/4000...c00HUG7bw&mp=1
There are variable voltage here too:
https://www.aliexpress.com/item/3295...:%223339%22%7D

I think you should look into getting some cheap 750w AC servo sets such as Lichuan on Aliexpress to be perfectly honest.
By the time you've figured out reliable motors/drivers/psu the cost difference will be negligible.




(I bet your machine would prob work fine with nema24 566oz on 60v beings it has reduction tbf).

How about this stepper motor from Avid... will it work with these 60v drivers?

https://www.avidcnc.com/960-oz-in-ne...tor-p-112.html

At 2mh the inductance is quite low and 960oz should be plenty of holding power... they are a little pricey but I have a friend who has 4 of them on his machine and they are great.

[MicFarlow]

so... an observation.... these steppers have a gear reduction of 29:1... that seems excessive to me. the Avid 960oz Nema 34's work just fine with a 3.2:1 ratio...

I would think changing the gear reduction to something along the line of 5:1 would be a or 6 fold increase in speed and the expense of some torque....

What are the drawbacks?