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Adjusting the REXA30 ring
Step 1
•
Remove the protective film from the surface of the REXA.
•
Measure the run-out on the REXA ring using a Dial Test Indicator (DTI) to. Use a DTI with low
exertion force to avoid scratching the scale surface. A DTI with a ruby ball stylus is recommended as
a further precaution against scratches.
NOTE: At this stage the ring is not firmly fixed, so to avoid causing the ring to shift position, rotate the
ring slowly and smoothly.
•
Where the DTI shows the lowest radius reading, gently tap the opposite side of the ring on the edge
using a rubber mallet, until the DTI reading is approximately at the 'mid-point' of the run-out.
•
Find the new lowest radius reading.
•
Tap the opposite side of the ring with a rubber mallet until the DTI reading is at the 'mid-point' of the
run-out.
•
Repeat this process until the run-out of the ring is approximately 30 µm TIR (0.0012 inches).
Step 2
•
Adjust ring position until the DTI (dial test indicator) reading at these points agrees to 10 µm TIR.
NOTE: 52 mm and 57 mm rings do not have 'slot' fiducials marked.
'Slot' fiducial
44
RESOLUTE™ Functional Safety Installation guide and safety manual Siemens DRIVE-CLiQ encoder system
'Slot' fiducial
Use a DTI with low exertion force to avoid scratching
the scale surface. A DTI with a ruby ball stylus is
recommended as a further precaution against scratches.
Original instructions
DTI
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