I check the same twice, found no issue, is there any heating issue of drivers?( At morning I ran the same gcode thrice found no issue as I added a big fan replacing the little one on grbl shield), I am using DRV8825 and NEMA23 Stepper motor. Kindly find the attach datasheet and please suggest me the correct VREF for motor drivers, if possible.
Thanks in advance.
Operating Voltage (logic) 3-5.25V
Operating Voltage (vmot) 12-24V
Max current 2.5A