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I seem to have all the main parts working. have not messed with the SD card yet.
Used it during our annual county fair STEM presentations and it was an attention getter.
Just using this as a place to put notes about what I find as I go. in case someone else is trying to use the reprap ramps 1.6 kit.
Make sure and adjust the current limiter on the 8825 drivers.
I used these 2 resources to help
https://www.youtube.com/watch?v=YJSmrbeZUp4 (i have a millright CNC)
based on my motors Nema 17 OK42STH34-1504AC , they take 1.5amps, so I adjusted the voltage on the current limiter to .75 volts (or as close as i could).
Results. steppers are much quieter and are not jumping / locking like there were when the current limiter was set to default (~1.6 volts)
The LCD screen works, the encoder and push button work. I am not sure it is displaying the correct prompts. ie, when i tell it to start i have to click the encoder knob 2 or 3 times to get it to start, but the screen does not change. I just see the prompt to change the pen in the serial monitor and push the encoder knob.