Needs way too mich voltage
1/5
I pcied these up a while back and things started out fine. Then the layer shifting started, and got worse. Prints would do fine IF you slowed it down to below 70% speed. Was told to up the Vref voltage as these like a lot of voltage (more than 2 volts). Made it through 3 or 4 prints then it fried the board. New board installed and it layer shifts worse than ever. Now I am looking for new steppers again.