Hardware build log - OxRAMSociety/RobotArm GitHub Wiki

  1. Connect the power supply.
  1. Connect the RAMPS 1.4 board matching the colors of the cables.
  1. Setup the jumpers and install the 5 drivers on the RAMPS 1.4. Since we are using A4988 drivers, setting all the jumpers will set the micro stepping to 1/16 of a step.
  1. Connect the motors.
  1. Connect the stepper motor extender directly to the power supply matching the colors of the cables and install the driver.
  1. Connect the extender to the main RAMPS board.

We need 5 cables: 2 for 5V and ground (here red and black respectively) and 3 for the enable (yellow), step (orange), and direction (green) pins of the motor.

Here we are using some pins in the AUX-2 cluster, which provides 5V and ground pins as well as the unused pins D40 (green, direction), D42 (orange, step) and D44 (yellow, enable).

  1. The extender can be configured with a DIP switch instead of jumpers. In this case we are using a DRV8825 driver, so we set the last switch to enable 1/16 micro stepping.
  1. Connect the 6th motor to the extender.
  1. Connect the LCD display smart controller to the RAMPS 1.4 board
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