Rcdm Rotary Disc Installation Drawing - Renishaw ATOM Installation Manual

RCDM rotary disc installation drawing

Set-up LED
' A ' ± ' E '
Forward
direction of disc
(increasing count)
Alignment band for
aligning the disc on
the hub / shaft
(Pitch tol. ±1°)
0.36
Rideheight (for calibration):
2.5 ±0.08 (40 µm version)
2.5 ±0.04 (20 µm version)
Operating rideheight:
2.5 ±0.11 (40 µm version)
2.5 ±0.055 (20 µm version)
10 ATOM rotary encoder system
Centre of alignment band
10.25 ±'F'
Reference mark
Centre of
alignment band
FPC cable
D1
D2
D3
(mm)
2.3
(Roll tol. ±1°)
0.22
Disc
Line count
size
D1 D2
20 μm 40 μm
version version
17 - 1 024 3.275 8.10
20 - 1 250 3.275 11.00
25 - 1 650 6.46 16.10
27
- 1 800 9.625 18.00
30
4 096 2 048 12.8 21.15
36 5 000 2 500 12.8 26.90
50 7 200 3 600 25.5 40.90
56 8 192 4 096 25.5 47.25
68
10 000 5 000 25.5 58.55
108
16 384 8 192 50.9 99.20
Dimensions and tolerances in mm
Glass disc
Black mask 10 µm (±5 µm) thick on reverse of disc
underneath incremental and reference track
For detailed installation drawings, including tolerances, refer to
www.renishaw.com/atomdownloads
Radial tolerance
Optical
E (mm)
A
D3 diameter
(mm)
20 μm 40 μm
(mm)
version version
16.9 13.04 10.63 - 0.1
19.9 15.92 12.07 - 0.1
24.9 21.01 14.62 - 0.125
26.9 22.92 15.57 - 0.125
29.9 26.08 17.15 0.1 0.125
35.9 31.83 20.03 0.125 0.175
49.9 45.84 27.03 0.125 0.2
55.9 52.15 30.19 0.125 0.2
67.9 63.66 35.94 0.15 0.2
107.9 104.30 56.26 0.2 0.2
Longitudinal
tolerance F (mm)
20 μm 40 μm
version version
- 0.1
- 0.1
- 0.075
- 0.075
0.075 0.125
0.075 0.2
0.075 0.2
0.1 0.225
0.125 0.3
0.225 0.3