[mactec54]

Interesting. Yeah I'm just going off of everything I'm reading and the common recommendation for minimum frequency setting is 100hz. Makes sense that it would only apply if spindle is under load. So I'm fine to drop it to 1k or so as long as I'm not cutting?

You don't have to be cutting, they draw a lot of current when running slow and over heat very quickly, and before you know it they are damaged, the manufacturers has a written specification as to how slow they can run safely and if you look at the Manufacturers site ( not the Sales site ) you will find the minimum RPM for your spindle, almost all that run with a Max of 24,000 RPM only have a minimum of 6,000 RPM

[A_Camera]

they draw a lot of current when running slow and over heat very quickly

That's nonsense. They draw practically NOTHING at slow speed unless you run in vector mode.