800w spindle - noise & controlling remotely

[Jonathan]

I did some speed research earlier...my interpretation may be incorrect, but I thought these VFDs put out a PWM pulse stream (& relies on the inductance of the spindle coils to essentially filter the VFD output pulses & restore a sine wave from them - similar to filterless class D audio amplifiers). If that the case, then the aforementioned 230V output, will be the maximum peak to peak level of the restored sine wave)

Yes the VFD outputs a PWM signal which is subsequently filtered by the inductance of the spindle, but there's a bit more to it. The input to the VFD is the mains, which is simply rectified and stored in some capacitors - this is called the DC bus. The DC bus voltage is therefore around 230*1.414.. =325V DC, so the peak voltage of the PWM waveform outputted will be around 325VDC. That means the rms output voltage will be 325/1.414=230V AC. Other things do influence the DC-bus voltage and your drive can do more than use a simple PWM signal with vf control to change things, but that's not important right now...

I have skype, which I seldom use & I can't immediately lay my hands on my webcam - if I find it I'll give you a shout on here :-) (but missus has furrowed brow which roughly translates into "you must not pursue this anymore this evening!")

Don't need a webcam.