Ok, im an idiot..... after reading the Smart effector install guide for the 5th time. it occurred to me in a photo that i had the rods installed wrong. i had connected the rods to each point in the triangle. i.e. right next to each other instead of spaced equally each rod next to its neighbor rod. like in this picture....
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right, it travels smooth now. all directions travel as expected. thanks for all your help and suggestions. as always this is an excellent forum and the duet is a great piece of hardware!
but dont you fret ill be back with some other insane problem that i overlooked in the guide.....
Ben