Hi.
I am having problem of spindle speed fluctuation. My rpm goes +-500 to +-800 up and down always amd doesn't remain constant
My machine have 1.5kw 400hz water cool spindle with ae-200 vfd.
Need help as this problem effect my aluminum milling jobs.
One thing more. It doesn't fluctuates when rpm set to 24000
Also i check. My spindle is ground correctly my machine is ground correctly and my vfd main 220v is ground correctly