NEED HELP PLEASE!!!!!

I got a BP BOSS series2 mill. I am getting all kinds of confusion
as to what voltege and amps the steppers need. I know there were 2
different steppers used there was the superior and the sigma. If I
am not mistaken my steppers are superiors. On the inside of the
motor end cap there is a wireing diagram and it tells the the p/n
number, 025805 this is an alternate motor for p/n 026744. Does
anyone know the voltege and amps these motors need to run properly.
I posted a time or 2 already and got an email box full of
suggestions to upgrade to servo. I would like to upgrade to servo
but my bank account does not permit it. These motors drive the
screws through a 2:1 belt ratio if that helps give any clues as to
the requirments of them.

Jessie