It seems the UC100 will max out at 100Khz which would not allow the 1,500watt spindle to reach it's full RPM of 24,000 on the 6040. Is that correct? please teach me this topic.
I'm considering a chinese/eBay 6040 which has a parallel port lacking a motion controller so I would buy a motion controller such as the UC100 or the UC400ETH and then buy the full legal license for mach3 (or even UCCNC).

So my main goal is to be able to run the 1,500 watt spindle at it's full range from minimum up to 24,000 RPM on that chinese 6040.

thank you kindly