Originally Posted by
ger21
It has no effect, as long as you don't need more steps/sec than the kernel speed can provide.
The default for your drives it 2000 steps/revolution.
35Khz gives you 35,000 steps/sec. That's 2,100,000 steps/min. Divided by 2000 steps/rev, you can get 1050 rpm max at 35Khz. That's 5250mm/min.
If you want to go any faster, you'll need to increase the kernel speed.
As you increase Kernel speed, Mach3 uses more CPU cycles, and at some point, it may become unstable. How high you can safely go varies from PC to PC.