I'll keep it short, when I set my duet to 16x interpolation on microstepping everything works great. If I change to any other setting only changing my mm/s to reflect the difference my X and Y move diagonally when i try to make straight moves. They are moving at an odd angle with the two steppers running at different speeds. Other than that MAN do I love these electronics. Everyone involved deserves a lot of kudos.
(edit) - ive been using the web configurator to make all of these changes…if that helps.
-er3