LMD18200 driver for bipolar motor

Other Hardware Motors, Mechanics, Power and CNC
12

Ok guys thanks.
I'm not expert,it clear, so your comments raise some further questions.

  1. Likely, I misunderstood the documents I read. Expecially this:http://www.spickles.org/projects/lmd18200/
    It convinced me that the LMD18200 was enough to drive stepper motor.Is it referring to unipolar motor?
  2. Why I cannot use a H-bridge to control a bipolar motor? See:http://arduino.cc/en/Tutorial/MotorKnob
    It looks like that with a single H-bride you can controll a bipolar stepper motor. They use a Texas Instruments SN754410NE and I thought LMD18200 was its big brother.
    3)It is the example wrong ? If the esample is right, there isn't a chip instead of SN75441ONE that can run stepper motor with 3A per phase?
  3. If I have to use two H-bridges (I have 2 LMD 18200) can I sincronize them by the arduino board ?
    Thanks

PS: my motor has 4 wires