10
TONiC RESM20 angle encoder system installation guide
u
Adjust the screws to reduce the range of radial displacement. When adjusting, identify the screw location
with the lowest radial displacement and tighten that screw, aiming for the average of the highest and
lowest indicator readings.
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Repeat this process until the DTI readings are within ±5 µm at the screw locations.
NOTE
: It may be necessary to loosen screws whilst tightening other screws.
NOTE:
At this stage, the screws
should only be lightly tightened
(less than 0.5 Nm) to allow
further final adjustment.
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Insert the next screws:
•
For RESM20 rings with 6, 9 or 12 mounting holes,
insert all the remaining M3 screws.
•
For RESM20
rings with 16 mounting holes, insert
4 equally spaced M3 screws.
•
For RESM20
rings with 18 mounting holes, insert
6 equally spaced M3 screws.
•
For RESM20
rings with 20 mounting holes, insert
8 equally spaced M3 screws (in four groups of two)
between existing screws.
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As described in Step 2, adjust all the screws inserted thus
far, so that the radial displacement at each screw location
is within ±5 µm.
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Again, at this stage, the screws should only be lightly
tightened (less than 0.5 Nm).
NOTE:
You may notice that the torque required to achieve
the radial displacement tolerance will be slightly higher
during step 3 than during step 2. This is normal.
Step 3
Taper mount method
(continued)
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Insert screws into the remaining mounting holes.
Diameter
(mm)
Recommended
torque range
(Nm)
≤ 115
1.5 - 2.1
150 to 255
0.8 - 1.1
300 to 413
0.5 - 0.7
≥ 417
1.2 - 1.7
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Rotate the RESM20 ring, measuring the radial
displacement at all of the screw locations.
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Tighten the screw with the lowest radial displacement so
that it matches the average radial displacement, whilst
ensuring the maximum torque specified in the table is
not exceeded.
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Again, rotate the RESM20 ring and re-check the radial
displacement at all of the screw locations, tightening
the screw with the lowest radial displacement so that it
matches the average.
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Repeat this process until the radial displacement at all
of the screw locations is within ±3 µm and that all screw
torques are within the specified range.
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Excessive tightening of screws can have a small effect on
accuracy. Please contact your local representative for
more details.
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Clean ring using Renishaw scale cleaning wipes or a
clean, dry, lint-free cloth.
Step 4
Step 5