think i got it
so, you have a 40k rpm turbine, that can hold 1/4shanks, and you wish to know it's offset from main spindle
1/4, is cca6mm ... k
clamp a calibration ring on the table
er collet chuck+ interapid, test indicator, with 6mm shank, then aling spindle to ring; init 0x 0y
z up, replace toolholder with turbine, clamp the indicator into it, then jog the axis, and find your offset
in case you think that the extra mile is needed, try to do both at same(small diff) z value, so to avoid tram related deviations
:cheers:
please, what is vfd ?
if you wish, can you detail this a bit ? i don't get it, and seems interseting / kindly