Stepper motor moving extremely slow with Protoneer CNC Shield, Pololu DRV8825

Other Hardware Motors, Mechanics, Power and CNC
1

Hello all,

Currently, I am having difficulties with setting up a CNC project as the stepper motor is moving extremely slow. I am able to hear the stepper motors, but no movement is visible on the driver post. I have tested the voltage being applied to the CNC Shield and is shown as 12V from the power supply. The potentiometer on the DRV8825 driver is set to 1.5A. In order to test the stepper motors, I am using UGS to interface with GRBL which is running on the Arduino Uno. I have searched and searched on other forums for solutions to this issue, but most all seem to be code related and not reliant on GRBL. Here is what I am using in this project:

  • Arduino Uno running GRBL
  • Protoneer CNC Shield V3.00
  • Pololu DRV8825 Drivers
  • 12V 30A DC Switching Power Supply (Amazon.com)
  • NEMA 17 Stepper Motor (Amazon.com)

Thank you for any help in advance!

2

Test the motors with this Simple Stepper Code. You will need to adapt the code to the appropriate I/O pins for each of your motors.

If the motors work properly then the problem is probably somewhere in your GRBL configuration.

...R
Stepper Motor Basics

3

Thanks for the reply,

I used the stepper program linked and the motor worked fine! I looked into GRBL configuration and the axis acceleration was very low for some unknown reason. I reset the value to a known default and everything works!

Thank you again!