Okay, I have my VFD (http://www.automationdirect.com/adc/Shopping/Catalog/Drives/GS2_%28115_-z-_230_-z-_460_-z-_575_VAC_V-z-Hz_Control%29/GS2_Drive_Units_%28115_-z-_230_-z-_460_-z-_575_VAC%29/GS2-22P0) wired up to my 1.5 HP vari-speed head Bridgeport.
Everything works great, but at low RPM, say...