Table of Contents
Advertisement
RCDM rotary disc: Installation drawing
For dimensioned readhead drawings see pages
Set-up LED
A ± E
Forward direction
of disc
(increasing count)
(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)
ATOM DX
rotary installation guide
(Cabled readhead shown)
15
and 16.
Centre of alignment band
10.25 ± F
Reference mark
Centre of
alignment band
Alignment band for
aligning the disc
on the hub/shaft
D1
D2
D3
2.3
Glass disc
Black mask 10 µm (±5 µm) thick on reverse of disc
underneath incremental and reference track
(Roll tol. ±1°)
0.22
For detailed installation drawings, including tolerances, refer to
Line count
Disc
D1
D2
size
(mm)
(mm)
20 µm
40 µm
(mm)
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
www.renishaw.com /opticalencoders
Radial tolerance
E (mm)
D3
Optical diameter
A
(mm)
(mm)
(mm)
20 µm
version
16.9
13.04
10.63
–
19.9
15.92
12.07
–
24.9
21.01
14.62
–
26.9
22.92
15.57
–
29.9
26.08
17.15
0.1
35.9
31.83
20.03
0.125
49.9
45.84
27.03
0.125
55.9
52.15
30.19
0.125
67.9
63.66
35.94
0.15
107.9
104.30
56.26
0.2
Dimensions and tolerances in mm
Longitudinal
tolerance F (mm)
40 µm
20 µm
40 µm
version
version
version
0.1
–
0.1
0.1
–
0.1
0.125
–
0.075
0.125
–
0.075
0.125
0.075
0.125
0.175
0.075
0.2
0.2
0.075
0.2
0.2
0.1
0.225
0.2
0.125
0.3
0.2
0.225
0.3
4
Advertisement
Table of Contents
