Setting up 5i25+7i85+8i20

Thank you! Now it's spinning in sinusoidal mode. Do I write this code for every 3 axis, and How do I integrate it?

Yes, you need a similar bit of code for each axis.

Then you need to use a PID component to close the position loop.
Take a look at the hostmot2 servo sample configs.

I was able to get my BLCD motor spinning with the post from andypugh in the first page on hall patterns 15 and 34. At any current above 0.5 it gets a a bit wonky. Is there any way to tune for trapezoidal commutation? My motor only has halls, no encoder. I have no idea which hall matches which phase but I assume trying the different hall patterns are pretty much working this out. My test file:

Just out of curiosity, has anyone tried to run an AC induction motor off an 8i20 and the BLDC component like a VFD? looks like cfg=n and the frequency pin might do it.

I suspect It may be hard to get hall only commutation working well without either
interpolating the drive angle between hal edges or setting the 8I20s current loop gain
much lower (or ideally adding an encoder)

blazini36 wrote: I was able to get my BLCD motor spinning with the post from andypugh in the first page on hall patterns 15 and 34. At any current above 0.5 it gets a a bit wonky.

Is this because it is spinning too fast? If the motor isn't under load (ie isn't connected to the machine) it is possible that things will work better then. (If it's a spindle, then this won't help)

You could try running the servo thread faster, if the machine can handle it,

Yes, as a torque mode drive you need to have some kind of speed control implemented