Is there a test code that will allow me to use the ramps1.4 as a test fixture to set vref for on the a4988 stepper drive?

Is there a test code that will allow me to use the ramps1.4 as a test fixture to set vref for on the a4988 stepper drive? I have been just adjusting the stepper drivers by the sound -low tech way.. But now I am wanting to do things the right way I am looking to set up a ramps 1.4 as a test fixture for settings the vref- max voltage of the a4988 or drv8825..so basicly I am looking for a test code that would allow me to do this? I am hoping for something that would do single step mode and keep the stepper driver energized so I could accurately measure the vref volts without it stepping.. https://reprap.org/forum/read.php?219,525734,525734#msg-525734 Tue, 21 Jul 2026 04:15:59 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?219,525734,525794#msg-525794 Re: Is there a test code that will allow me to use the ramps1.4 as a test fixture to set vref for on the a4988 stepper drive? https://reprap.org/forum/read.php?219,525734,525794#msg-525794
They were likely showing the measurements of the output to show how it tracked, but that is not necessary.

- Tim]]> tadawson RAMPS Electronics Wed, 24 Jun 2015 23:19:11 -0400 https://reprap.org/forum/read.php?219,525734,525771#msg-525771 Re: Is there a test code that will allow me to use the ramps1.4 as a test fixture to set vref for on the a4988 stepper drive? https://reprap.org/forum/read.php?219,525734,525771#msg-525771 tm america RAMPS Electronics Wed, 24 Jun 2015 20:50:46 -0400 https://reprap.org/forum/read.php?219,525734,525767#msg-525767 Re: Is there a test code that will allow me to use the ramps1.4 as a test fixture to set vref for on the a4988 stepper drive? https://reprap.org/forum/read.php?219,525734,525767#msg-525767
VRef is a static reference voltage used by the driver chip to compare against the voltage developed across the sense resistors. It is *NOT* derived from actual motor current . . .

- Tim]]> tadawson RAMPS Electronics Wed, 24 Jun 2015 20:32:05 -0400 https://reprap.org/forum/read.php?219,525734,525734#msg-525734 Is there a test code that will allow me to use the ramps1.4 as a test fixture to set vref for on the a4988 stepper drive? https://reprap.org/forum/read.php?219,525734,525734#msg-525734 tm america RAMPS Electronics Wed, 24 Jun 2015 18:17:13 -0400