Hey,
I am building 3d printer and i have problem with motors on z axis.
I am running NEMA 17 motors - [www.electronic-things.de]
on controller A4988 Stepper Motor Driver Carrier and I have ramps1.4 - [www.pololu.com]
On the axes x,y motors are running perfectly with vref set to 0,46
Problems are starting when I am plugging two of them, I increased vref to 0,94 and check other values but it didn’t help.
I have read that maximum output current 2 A on motor driver.
And two run two motors at the same time i need minimum vref 0,92 V, that means 2,3 A
Is this could be a reason ?? Do you know what could cause this problem ?
I will be grateful for any suggestions.