Hi Rick
Not sure if you got an answer to the compatability issue..... I am using md808's and they work fine. Like others have said if the motors lock when you power up that is fine.
Couple of questions:
Have you supplied 5vDC to the opto input?
is the power led on and the fault led off?
have you set the dip switches in the rear for the nuber of micro steps and current limit suited to your motors?
Your motor windings should be about 3ohms and open crt between them.
To make the drive work you only need:
opto.... 5vdc
pulse.... clock/step signal
dir... direction signal.
BTw these aere chopper drives and the comment that the ps voltage devided by the winding ressistance is the current draw is incorrect. the current limit is set by the dip switches and should vbe set to what is shown on the motor. ie 2 amps.
cheers
Mark