Hey Wdbilbo, I just got a 6040 w/1500w spindle from ebay and I followed the the simple instructions and had X,Y,Z working without a hiccup. However when I went to fire up the spindle I got nada. I seen it twitch once and thats it nothing else, deader then a door nail. This was today!
The VFD display reads from lowest to highest spindle speed of 120 up to 4000 when I adjust it up and down in MACH3. So I pulled the cover off the controller and checked the output Hz and its a 60Hz all the time when checking with a Fluke multi meter. I am assuming its the PWM that varies the actual spindle speed and cant be read with a regular multi meter?
So I went ahead and checked the 3 pins at the top of the spindle motor and they are all shorted...1.0 ohms across each phase. Maybe we are buying them from the same person and they are selling bunk motors?