Hi @DaveX -
Thanks for talking this through with me. I've been going on a month now, mainly with this one objective of getting this stepper to go faster.
This is the motor I'm using: https://www.omc-stepperonline.com/download/17HS19-2004S1.pdf
I haven't been able to find any information on PPS, though. On the site, it said it was a "12V" motor, but my understanding is that these motors can often be run at 24 - and perhaps that would help the situation?
The load right now is non-existent. I am simply trying to get it to spin as fast as possible - I know there are major torque losses at the high speeds, but this has become a "single goal" project at this point.
The TMC2209 Driver is spec'd to handle up to 29v.