Drv8825 max vref?

Mostly Printed CNC - MPCNC Troubleshooting
1

I have a set of Nema 23 motors and I was going to use the microcontroller I bought from your shop to run the setup but I’m a bit stumped. The motors have a max A/Phase of 4.

So going by what I saw in the video on this site for setting up the current limit https://www.v1engineering.com/assembly/ramps-wiring/ ,I am limited to setting the vref to .75 volts? Which would max out the Drv8825?

Am I doing this correctly?

2

If you have good fans on them you can run the drv8825’s at 1V sometimes up to 1.2V

3

Is the increase in voltage just to help the motors resist slipping?

4

more power overall