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Appendix

Mercury II 5000 Series Encoders

Installation Manual and Reference Guide

Resolution and Maximum Speed Tables - Serial Output

Mercury II 5800Si/Pa systems have programmable interpolation from x4 to x16384 in binary

steps. Below is a table of examples. Unlike A-quad-B encoders, the MII5800Si/Pa resolution does

not drop off with speed.

Linear – 20µ Grating Pitch

Interpolation

Multiplier

Interpolation

Bits

Resolution

Maximum Speed

x 4

5.000µm/count

10000mm/sec

x 8

2.500µm/count

10000mm/sec

x 16

1.250µm/count

10000mm/sec

x 32

0.6250µm/count

10000mm/sec

x 64

0.3125µm/count

10000mm/sec

x 128

0.15625µm/count

10000mm/sec

x 256

0.078125µm/count

10000mm/sec

x 512

0.0390625µm/count

10000mm/sec

x 1024

19.53125nm/count

10000mm/sec

x 2048

9.765625nm/count

10000mm/sec

x 4096

4.8828125nm/count

10000mm/sec

x 8192

2.44140625nm/count

10000mm/sec

x 16384

1.220703125nm/count

10000mm/sec

Rotary – 20µ Grating Pitch

Note: The range of available values is x4 to x16384 in binary steps; sample values below.

Rotary Glass

Scale Diameter

Fundamental Resolution

Interpolation

44.45mm

5000 Lines

x1024

x4096

x16384

interpolated resolution (CPR)

20000

5120000

20480000

81920000

interpolated resolution (arc-

sec/count)*

64.8

0.253

0.0630

0.01582

interpolated resolution (µrad/count)*

314

1.23

0.306

0.0767

maximum speed (RPM)

6000

63.50mm

8192 Lines

x1024

x4096

x16384

interpolated resolution (CPR)

32768

8388608

33554432

134217728

interpolated resolution (arc-

sec/count)*

39.6

0.154

0.038

0.00966

interpolated resolution (µrad/count)*

191.7

0.749

0.187

0.0468

maximum speed (RPM)

3660

120.65mm

16384 Lines

x1024

x4096

x16384

interpolated resolution (CPR)

65536

16777216

67108864

268435456

interpolated resolution (arc-

sec/count)*

19.78

0.0772

0.01978

0.00481

interpolated resolution (µrad/count)*

95.9

0.375

0.0937

0.0234

maximum speed (RPM)

1830

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)

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 69 70

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