@rushmere3d thank you so much. The video helped me a lot.

Hey everyone,
My name is Omkar and I'm a student at Florida Tech. I was working on my Duet 2 wifi printer for a school project and I wanted to add the pebble wiper to it. I've installed the wiper and I have got the servo motor to work. My only issue is with the stepper motor (for vertical adjustment). The stepper motor is completely operational and it works. I just don't know how to program it to change the height to each specific model. I have 4 types of nozzles with different types of heights and I needed the wiper to change height accordingly. I have been using the macro files from
https://github.com/KevinMar1/Pebble_Wiper
but i don't have the g code to move it to different nozzles. My question is how do I identify between the different nozzles and how do i make the stepper motor change height accordingly (basically what g code do i use). Thank you

Specifications -
Duet 2D Wifi
RepRap fimware 3