[GreenKeys] Machine speed and VFDs

[Robert Goff]

This is probably a really stupid question,  BUT:

I was just looking at the gear chart in an old Atlantic Surplus
catalog comparing the gear ratios from 100 speed to 60 speed on a
model 28.  It looks to me like for 60 wpm the 3600 rpm of the motor is
being reduced to 525 rpm by the combination of the pinion and the main
gear.  For 100 wpm it is 857 rpm, approximately the ratio of 5:3.

If you had a machine geared only for 100 wpm and you used a freq drive
to reduce the motor speed to 2205 or so, so that the main gear was
spinning at 525 rpm, would the machine then operate at 60 wpm?

Has anyone tried this?  Is there something I'm missing?  Frequency
drives for fractional horsepower motors have really gotten pretty
cheap, and maybe easier to track down than 60/67/75/100 gear sets.

Thanks,
de Robert W7MKA