Control 8 stepper motors with Arduino Uno or Due using CNC Shield

Using Arduino Motors, Mechanics, Power and CNC
4

Hello

I want use Mema 8 bipolar stepper with A4988 driver on CNC Shield Board with Arduino Uno or Due micro controller

With Arduino Uno, my connection is:

  • jumper reset and sleep together
  • VDD to Arduino 3.3v or 5v
  • GND to Arduino GND (GND near VDD)
  • 1A and 1B to stepper coil 1 black/green wire
  • 2A and 2B to stepper coil 2 red/blue wire
  • VMOT to power source (9v battery + term)
  • GRD to power source (9v battery - term)

I've checked 2 power adapters with 9 and 12 V

I've tried use it with CNC shield as well as with breadboard, which connection shown below, I don't know why, but motor does not moves

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I'm using DC Jack for adapter to stepper, back pin connected to the center pin plus, front pin is ground according to adapter -C+, the third leg is not used, I do not even know its purpose, maybe I did something wrong way

Any advice, guide or example would be helpful