Yankee,
Okay, I visited danthompsonsblog and read up on how the Easydriver 4.2 is being used, also studied the code (code didn't use stepper.h library). With all that, I will do a three pin connection: one to "clock", two to "direction" and three, "gnd" to "gnd". I'm assuming the "clock" on the MBC25081 is the equivalent to "step" on an Easydriver board.
My application is to pull flat wire off a 10 lb. coil and feed it into a cut off mechanism. The stepper motor turns a drive roll that pulls on the wire. The wire is held against the drive roll with a urethane roll...sort of a pinching process. The motor has to have the torque for all this, but I feel the one I chose is up to the task, with 467 oz-in of torque. My decision to go with the factory MBC25081 is to insure I don't short change the motor, causing damage with a short life span. I'm undecided as to what I'm going to use as a power source, either a 12v SLA battery (with charger) or a high wattage PC switching power supply. The cut off machine must provide 10K parts per 8 hour shift, so reliability is a must.
Thank you,
Cris