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Graph of tracking coil errors with aluminum ball joint, brass gear and phosphor bronze flex-shaft. The errors in mm are displayed over the displacement from the tracking coil in mm. The three lines indicate the position errors for coil 1, coil 2, and coil 3, respectively. Coil 1 is initially placed adjacent to the metal component. Coil 2 and 3 are not influenced by the metal object.
