I'll convert my machines numbers to metric for comparison. It has very similar specs, with different screws.

Xylotex drive
24V power supply
1.78Nm steppers
6.35mm lead acme screws with AB nuts from www.dumpstercnc.com
4000mm/min

My Y axis can get 4700mm/min

And I have a large sized machine, 760mm x 1150mm cutting area, with 2HP router.

Hi Gerry

I wonder how your PS V to motor V ratio compares to roly's.

Ian

They are PacSci 3.5V, 2.3amp.