Okay I finally started farting around with this.
Mind blown for sure.
My build, fully loaded router and vac hose just as I use it. 12V
Zmax speed, 63.8mm/s
Xmax, 300mm/s
Y max, 285mm/s
See those numbers, that is nuts, fully loaded CNC. To be very clear, everyone’s CNC will not match these numbers. My firmware normally limits the XY to 50mm/s, Z to 15. Clearly I can raise that a bit.
24v…here is the catch Acceleration. RepRap Calculator - Original Prusa 3D Printers
Z max (stock 80mm/s/s) 75mm/s *accel limited. Plenty of room for more. Too much experimenting so I played with the X instead.
Xmax (stock 180mm/s/s) 330mm/s *accel limited. Okay hold your britches ----800mm/s/s 650mm/s and this number did not fail it just gets maxed out for the axis length I have.
let me repeat that one, 800mm/s/s 650mm/s
So lets discuss this a little bit. Clearly the 24v PS allows for faster rapids. Now in terms of actual real world use, rapids will help overall but 90% of the time is spent cutting, These numbers have no effect on this.
So to even take use of this we can not really speed up cutting accel, we could speed up travel accel though. I just don’t think it makes too much real world difference.
I also did check holding torque with a luggage scale, it is the same. Holding torque is current dependent, and current equals heat. This can’t be turned up until we move to metal stepper mounts. X axis was holding at more than 5kg (tmc 80% holding current), Z axis was more than 30kg holding!