Understood Doddy
What surprises me as you have so rightly pointed out the capacity of this VFD is rated at 300Hz yet the spindle that came with the machine is rated at 400Hz.
Why would the company send a boxed machine ( brand new ) with a vfd that is not even rated to handle the spindle they put in the box .

So i must ask what sort of price is a VFD box that would handle this 1.5 spindal

Would the 100Hz short fall in the vfd make much of a difference to the spindle.

So am now thinking shouuld i go and buy another vfd box to run this new spindle