In a previous thread I asked about 15 stepper motor simultaneously. I was able to get the proper items for this purpose with the help of the answers. Now I use A4988 stepper drivers with an Arduino Mega.
Now I will print a PCB with home-made techniques and trying to determine the width of the tracks. I don't have any question about the 12 V supply voltage for the stepper motors. However I don't know how much current VDD pin of the driver draws. As I was told supplying logic current to 15 stepper drivers will not be an issue I believe the current must be less than 20 mA but I just want to confirm. How can I determine the logic current a stepper driver draws from Arduino Mega?