I got a 7x7 kit from zen recently and put it together.I got Arduino CNC Shield for Arduino UNO, put it together, wired & powered up. I use grbl as controller.

When I send a move command for 1 axis stepper makes a small move to the direction and than makes a grinding noise.

I uploaded a video to show the exact problem: Stepper issue - YouTube

I was tested it with 5 and 20 steps, it didnt make any difference


I plugged only 1 driver and 1 stepper (X axis) and also tried Y & Z (1 at a time) but the results were same.


I have Nema 17 steppers (model# SST43D2121) and I use 20V 14 A power supply.



I am attaching 2 photos, 1 shows the whole machine and 2 show the board.


Thanks for helping me out.

Attachment 243434Attachment 243436