Suggestion on expansion board for DRV8825 driver

Projects General Guidance
1

Hello , I am going to do a project in which I have to control a Nema 17 bipolar Stepper Motor with the DRV8825 driver and an Arduino Mega. The stepper motor will be used to move a motorized slider , forward and backward.
The specifications for the Stepper Motor are the following:

  • Step angle : 1.8 deg
  • Holding torque: 40 Ncm
  • Rated curreng/phase : 1.7 A
  • Phase resistance: 1.5 Ohm
  • Insulation Resistance : 100 Mohm
  • Insulation Strength : 500 VAC
    As for the power supply , I will use a 12V 2A DC Wall wart.
    I know that breadboards are not really recommended for motor connections .
    My soldering skills are not quite good , so I have been doing a lot of research and I found this expansion board for a single DRV8825 .
    Here is the link to the following board : https://www.makerlab-electronics.com/product/a4988-drv8825-stepper-motor-control-extension-board/
    The question would be how reliable is this board and can I use it for my purpose?
    Thank you in advance for any help!
2

I can't speak for the reliability, but that is kind of a neat little board. It has the necessary bits and should make your wiring easier.

1.7 Amps coil current is on the high side of what a DRV8825 can handle without a heat sink and forced air cooling. Consider adding some active cooling or dialing the coil current down a bit. The driver should handle 1.5A without extra cooling.

Make sure that the coil current limit (Vref) is set properly before using the driver. Refer to the Pololu DRV8825 page.

3

Thank you for your help . Probably I will not use the motor at the full torque so I will limit the current in order not to overheat the driver.

4

This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.