Hi
Another tip for this motor:
As I say early epson motor used to be marked as EM-XXX
EM-25X are rated: ( ex: EM-257/EM-258 )
Nominal Voltage 7
Current 0.7
Resistance (Ohms) 10 ( as OP described on a previous topic:
Serial stepper driver - Motors, Mechanics, Power and CNC - Arduino Forum )
Are we talking about same stepper motor controlled by a LB1946 with 1.75 amp max output, or this one used with popolus is another one ?