8i20 and bldc, upgrading 2.5 to 2.7

If the previous output was controlling a 0-1 scale and now it is controlling a 0-15A scale then you would need to multiply the gain by (about) 15 as you have found.

You could experiment with using more I and less P.

Thanks for the good explanation of how the scale works. It makes more sense now.

I am still working on the tuning. I will try what you suggest.