Cncst4060

[Doddy]

I cannot recommend using that new spindle with the VFD that you have. The limited frequency range I can handle (it just means a lower maximum RPM - 18k RPM), but the lower power drive means that you carry significant risk of damaging the VFD.

There are settable parameters on the VFD that allow you to set motor current - but my feeling is that these are used to trigger the over-current protection, not to limit the motor current.

The problem now is that you've sourced the spindle - the supplier may be reluctant to support any subsequent change.

...unless anyone else knows more about the VFD motor-current settings?

[petesos]

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