It was complaining for a very good reason Arthur, and as usual the problem was right in front of me-- I had entered the wrong dimention for the Delta_Z_Offset . There is still a lot of tweeking to do but it is now basically working as it should. I managed to upload a video of it homing at the end of a “print” ( I have yet to install extruder and hot end) The video is on Vimeo I think you can find it seaching for Rotary Delta 3D Printer
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