MicroE Mercury II 5000 User Manual
Page 22
Appendix
IM-Mercury_II_5000_Series Rev. 1
Page 21
©2014 MicroE Systems
Mercury II 5000 Series Encoders
Installation Manual and Reference Guide
Rotary
– 20µ Grating Pitch
Note: Interpolation - the range of available values is x4 to x16384 in integer steps; sample values
below.
Rotary
Glass
Scale
Diameter
Fundamental
Resolution
Interpolation
44.45mm
5000 Lines
x4
x20
x40
x400
x1000
x4000
x16384
interpolated resolution (CPR)
20000
100000
200000
2000000
5000000
20000000
81920000
interpolated resolution (arc-
sec/count)**
64.8
12.96
6.48
0.648
0.259
0.0648
0.01582
interpolated resolution
(µrad/count)**
314
62.8
31.4
3.14
1.257
0.314
0.0767
maximum speed* (RPM)
6000
6000
6000
1500
600
150
36.6
63.50mm
8192 Lines
interpolated resolution (CPR)
32768
163840
327680
3276800
8192000
32768000
134217728
interpolated resolution (arc-
sec/count)**
39.6
7.91
3.96
0.396
0.1582
0.0396
0.00966
interpolated resolution
(µrad/count)**
191.7
38.3
19.17
1.917
0.767
0.1917
0.0468
maximum speed* (RPM)
3660
3660
3660
915
366
91.5
22.3
120.65mm
16384 Lines
interpolated resolution (CPR)
65536
327680
655360
6553600
16384000
65536000
268435456
interpolated resolution (arc-
sec/count)**
19.78
3.96
1.978
0.1978
0.0791
0.01978
0.00483
interpolated resolution
(µrad/count)**
95.9
19.17
9.59
0.959
0.383
0.0959
0.0234
maximum speed* (RPM)
1830
1830
1830
457
183.1
45.7
11.17
Applicable Mercury II 5000 Models
5500,
5700,
5800
5500,
5700,
5800
5500,
5700,
5800
5700,
5800
5700,
5800
5800
5800
Note: *Maximum speed produces an encoder quadrature output of 50 million states per second
(12.5MHz). See Page 24 for additional output frequencies. Maximum speeds shown above will be
reduced if a lower quadrature output frequency is selected.
Note: **Resolution values shown are approximate. To calculate exact resolution values, convert from
CPR (Counts per Revolution) to the desired units.
Note: To calculate desired rotary interpolation multiplier, use the following equation:
𝐼𝑛𝑡𝑒𝑟𝑝𝑜𝑙𝑎𝑡𝑖𝑜𝑛 𝑀𝑢𝑙𝑡𝑖𝑝𝑙𝑖𝑒𝑟 =
𝐷𝑒𝑠𝑖𝑟𝑒𝑑 𝑅𝑒𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛 (𝐶𝑃𝑅)
𝐹𝑢𝑛𝑑𝑎𝑚𝑒𝑛𝑡𝑎𝑙 𝑆𝑐𝑎𝑙𝑒 𝑅𝑒𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛 (𝐿𝑖𝑛𝑒𝑠)
Note: Specifications assume XOR function which is available in all standard controllers.