Taper Mount Method - Renishaw TONiC RESM20 Installation Manual

Taper mount method

Step 1 Mounting shaft specifications
Recommended taper roundness:
Diameter (mm) Roundness
value (mm TIR)
≤ 115 0.025
150 to 225 0.050
≥ 300 0.075
Recommended taper roundness
when using two heads and DSi:
Diameter (mm) Roundness
value (mm TIR)
≤ 115 0.0125
150 to 225 0.025
≥ 300 0.0375
Recommended taper diameter (DT):
DO (mm) DT (mm) DO (mm) DT (mm)
33.85 133.85
52 150
33.65 133.65
40.85 183.85
57 200
40.65 183.65
58.85 189.85
75 206
58.65 189.65
83.85 189.85
100 209
83.65 189.65
83.85 212.85
103 229
83.65 212.65
83.85 238.85
104 255
83.65 238.65
98.85 283.85
115 300
98.65 283.65
DO = Nominal external diameter.
Recommended surface finish ≤ Ra 1.2.
NOTE: It is recommended that the mounting surface is a turned, rather than ground finish.
TONiC RESM20 angle encoder system installation guide
DT
15° ±0.2°
7 min
*
1
*
Allow 2 mm for 417 mm, 489 mm and 550 mm rings only.
DO (mm) DT (mm)
333.85
350
333.65
395.85
413
395.65
383.85
417
383.65
454.85
489
454.65
513.85
550
513.65
Step 2
Remove the protective film from the surface of the the
u
RESM20 ring.
Clean shaft taper and internal taper of RESM20 as
u
recommended in 'Storage and handling', page 2
Insert the first screws:
u
• For RESM20 rings with 6, 9 or 18 mounting holes,
use 3 equally spaced M3 screws.
• For RESM20 rings with 12, 16 or 20 mounting holes,
use 4 equally spaced M3 screws.
NOTE: Do not lubricate screws.
Insert the screws so that the RESM20 is loosely connected
u
to the shaft, then roughly align the ring by eye and touch.
Lightly tighten the screws. Use a Dial Test Indicator (DTI) to
u
check the radial displacement at the screw locations.
NOTE: Disregard the radial displacement between the
screw locations.
DTI
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.
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