I think I figured out what I would like to do but would like to run it buy here to see if I am missing something.
If I go with a 6.75 pulley on the motor and 3.75 on the spindle, it will give me a 1:8 ratio with 3150 rpm at 60Hz and about 375 rpm in back gear.
At 120Hz I will have 6300 rpm
At the low end 10Hz, 525 rpm and 60 rpm in back gear.
Those numbers work or me as long as I am not missing something, also I can get a GS2 VFD from a friend who is no longer using it but it is not a sensorless vector unit and I am not sure if I should use it or just get a VFD that is sensorless vector.
Thoughts?
Thanks