tiny Rotational Delta Robot framework using 28BYJ-48 steppers

This will be a tiny Delta Rotational utility robot framework using those inexpensive 28BYJ-48 steppers. I am experimenting with them even though I am conscious that these steppers seem to have some backlash in the gearing, and that even appears to get less when the second pivot point is added like in this design. There is a planned place for a spring or rubber band to along with gravity 'default' that backlash. I am not sure how valuable the result will be but at any rate it is a interesting use of those motors and could be very accessible and inexpensive... Especially exciting is that this seems to be the first and only rotational delta experimentation platform so far on Thingiverse! However there are the FirePick and IcePick projects which are bigger open source rotational deltas.

Now that I just finished the last components and assembled them I am surprised, the operating range might reach beyond 10cm diameter and quiet a few cm height too. There are some errors still and some mi