Renishaw ATOM Installation Manual page 52

Speed
Clocked outputs
Ri0100, Ri0200 and Ri0400 interfaces have clocked outputs.
Customers must ensure they comply with the lowest recommended counter input frequency.
Maximum speed (m/s)
20 µm system
0100 0200 0400
(0.2 µm) (0.1 µm) (50 nm)
- 0.8 0.4
- 0.5 0.25
0.8 0.4 0.2
0.5 0.25 0.12
Non-clocked outputs
Ri0004, Ri0008, Ri0020 and Ri0040 interfaces have non-clocked outputs.
20 µm system
Interface type Maximum speed (m/s)
0004 (5 µm)
10
0008 (2.5 µm) 10
0020 (1 µm)
10
0040 (0.5 µm) 10
Analogue speed
40 µm system - 20 m/s (−3dB)
20 µm system - 10 m/s (−3dB)
52 ATOM rotary encoder system
40 µm system
0100 0200 0400
(0.4 µm) (0.2 µm) (0.1 µm)
- 1.6 0.8
- 1.0 0.5
1.6 0.8 0.4
1.0 0.5 0.24
40 µm system
Interface type Maximum speed (m/s)
0004 (10 µm)
20
0008 (5 µm) 20
0020 (2 µm)
20
0040 (1 µm) 20
Angular speed
Angular speed depends on disc optical diameter. Use the following equation to convert to rev/min.
Angular speed (rev/min) =
Lowest recommended
counter input frequency
(MHz)
12
10
6
4
Lowest recommended counter
input frequency (MHz)
× 4
Encoder velocity (m / s)
safety
Resolution (µm)
factor
V × 1000 × 60
Where V = maximum linear speed (m/s) and D = Optical diameter (mm).
p D