I started typing motor details into Google and identified the one as being a 12V stepper, but the datasheet is very limited. From the 6 pins I realized it has to be a Unipolar motor. I started testing the resistances between the pins and realised that the 2 centre taps are connected together.
Since my driver has a H-Bridge I need a Bipolar configuration and started investating if the two centre taps are joined internally of externally.
Step 1: Center Taps joined Externally
Step 2: Separating the two Center Taps
Step 3: Can it be used with a Bipolar Driver?
Coil A of 8.1 Ohm between Pin 1 and Pin 2.
Coil B of 8.1 Ohm between Pin 5 and Pin 6.
Looking at the datasheet, I get the impression that the motor won't draw serious current with a 12V supply (rated around 230mA), but using Ohm's law, I calculate that an 8 Ohm load will draw 1.5A of current from a 12V supply.
I really hope that my calculations are wrong since my driver can handle current ratings up to 2A, but I'm not planning to configure the Current Sensing and Chopper parts of the circuits, so it might get a bit hairy if I run at around 1.5A... Any Comments?
See the schematic I'm planning to implement and please let me know if you think I'm creating fire-lighters in stead of a stepper driver...?