10/ 60° at one end of the screw, it's the same in the middle, and at the far end, etc. Not worried about thread profile, which comes from
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21/ to platen, rotate both, lock platen to base, unlock scope, pivot scope back to target, repeat. You're basically measuring same angle >
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22/ 10 times, and thus your 21° angle is measured as 210° degrees. You divide by 10...and your ERROR is divided by 10 as well.
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Sudden flashback to my high school surveying class.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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