Heck I went from 30 max rapid to 100 IPM by changing from (single stack 23's that came with my xylotec 100 something ?) 1/4-20 to 276oz motors 1/2-13 allthread
velocity 20 ? DANG Ive got .75 which limits me to a nice no missed steps of 45 ipm.
I do know that my y axis ran ok at the slow setup but fought me for 3 days after the speed increase (alignment issues)
I'm running mach 2 for control (havent figured out all the settings for 3 yet)
Had that problem too, thought I would set up mach 3 for the new setup ,way slow , found its jog settings in a different place , and they were wrong.