Koike Aronson Plasma Conversion - sanity check on Mesa board selection?

FF1 can be tuned further to flatten the ferror plot

Once this is done, you can usually add some I term

If a SSR seems on all the time, it may be that you have the polarity backwards

Thanks for the quick reply. I've been referencing the servo tuning guides, which have been helpful. Would you go higher or lower on FF1 and how do you best determine if the f-error is at an acceptable level? The drives move smoothly, but unsure how much more tuning is needed.

For the polarity issue, would that be in the wiring, swap terminals at the board?

If the ferror is in the opposite direction of the velocity plot, FF1 is too high (first plot, FF1 = 1.8 is too high)

If the ferror is in the same direction of the velocity plot, FF1 is too low (second plot, FF1 = .027 is too low)

On the polarity, it should be checked with a voltmeter and the most positive lead goes to the OUT+ pin.