If you try and home your machine, and you find it only moves the 3 towers down, that is because somehow the machine lost it's Z height. It's most likely caused by accidentally clicking on the "Set Z=0 in the advanced configuration screen on your Orion. You'll need to connect your printer to a computer using the USB connection to reset the machine's Z max height, then we can re-calibrate the actual Z Height.
When I home the machine it only moves down a little bit
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"You'll need to connect your Orion to a computer using the USB connection to reset the machine's Z max height, then we can recalibrate the actual Z Height."
OK how I am connected how do I reset the machine height?
Here is what worked for me. Using the z-position control, I drove the head to near the bed. I then reset the z position to zero. Then I was able to Home All.