Just got my second 3-phase tool working with a Huanyang VFD... Oliver 270D. Also have a Poitras 4800.
Both are 3HP three phase, and I have gotten them both working with the VFD with the same issue in both cases.

When I set the motor up I end up getting RPM displayed as too high. It's too high by the the difference between 50hz and 60hz.
I end up going into the motor RPM (PD144 for those of you who might care about this detail) and dropping the motor RPM down by 17%.

Then when I fire it up, the RPMs display correctly. In other words, by following the instructions I should set PD144 on the 270D at 3500.
When I do this the saw spins up to 4200 (by the display, anyway). If I go in and set the RPMs down to ~3000, it spins out right around the 3500 spec.

I've not seen this issue discussed in the many postings I've read about configuring these VFDs.

I'm hoping the RPM display is correct on the VFD, and that it is not underspinning the motors now.

Anyone else run into this?

-Bob