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7. Adjust ring position until the DTI reading at these points agrees to 10 µm TIR.
NOTE: 52 mm and 57 mm rings do not have 'slot' fiducials marked.
'Slot' fiducial
8. Rotate the ring by 90°.
9. Adjust the ring position until the DTI reading at these points agrees to 10 µm TIR.
'Dimple' fiducial
10. Recheck the run-out at the two 'slot' fiducial points, to ensure the run-out is still within
11. Gradually tighten the 4 screws in turn, enough to grip and lightly secure the ring so as to
12. Insert the remaining M5 screws and, in a sequential pattern, gradually tighten them to a
'Slot' fiducial
13. Recheck the run-out at the two 'slot' fiducial points, then at the two 'dimple' fiducial points.
14. If the ring has moved position outside the 10 µm limit, the screws must be loosened and the
15. Clean ring using Renishaw scale cleaning wipes or a clean, dry, lint-free cloth.
'Dimple' fiducial
10 µm TIR. Adjust if necessary.
avoid moving the position of the ring.
torque of approximately 4 Nm.
NOTE: The run-out values at the 'slot' fiducial points do not have to match the run-out values
at the 'dimple' fiducial points.
ring adjusted.
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