Well I am not sure, was running it from a lab supply while I was experimenting, I remember it was right around 1.4v although it was over 3A so it wont work the the current regulator, however now that it works I might not need so much voltage before when the software was not working I spent a lot of time "trying everything" finally just left it. Monday I plan to do a better job working on voltage/current/speed parameters. Been running 4 hrs or so.
 
A:567 R:0+0(none) HW:14/.61%