Hey @c0depr1sm, I was thinking about Holey Triangular Calibration, and @Jametek’s test-cuts. I wondered about how the accuracy of the initial 12 O’Clock position of the gears impacted accuracy of the system. I looked at your analysis here. I am trying to understand: what is the error, in deg, relative to the accuracy I thought I was able to achieve with my machine? I see the 1/6th of a tooth. Doing the math with 10 teeth per rotation 1/6th of a tooth is 6 deg. From the hip, I thought I was able to achieve about + or - 3 deg accuracy. That would mean for my machine, I have about half of your modeled inaccuracy as a result of the initial 12 O’Clock position, about 1 mm if you include both. This is not addressed by Holey Triangular Calibration. Not saying it should be.
Nonetheless, this is definitely something that could be improved via a more precise approach on my part.