MicroE Mercury II 6000 - Manual (Page 24)

Appendix
IM-Mercury_II_6000 Series Rev. 1 Page 23 ©2014 MicroE Systems
Mercury II 6000 Series Encoders
Installation Manual and Reference Guide
Rotary – 20µ Grating Pitch
Interpolation Note: 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 Models 6500,
6700,
6800
6500,
6700, 6800
6500,
6700,
6800
6700, 6800 6700,
6800
6800 6800
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.