System Specifications
Resolution and Maximum Speed
Mercury 2000 systems have programmable interpolation from x4 to x256 in integer steps.
Below is a table of sample values.
Linear - 20μm grating pitch
Interpolation
Resolution
Maximum Speed*
x4
x10
x20
x50
x80
x100
x200
x250
5.000µm/count
2.000µm/count
1.000µm/count
0.400µm/count
0.250µm/count
0.200µm/count
0.100µm/count
0.080µm/count
7200mm/s
7200mm/s
7200mm/s
7200mm/s
7200mm/s
5760mm/s
2880mm/s
2300mm/s
To calculate desired linear interpolation multiplier, use the following equation
Interpolation Multiplier = Grating Pitch (20µm) / Desired Resolution (µm/count)
Rotary - 20μm grating pitch
Rotary
Glass Scale
Diameter
Fundamental
Resolution
Interpolation
Note: The range of available values is x4 to x256
in integer steps; example values below.
0.472” [12.00mm]
1650 CPR
x4
interpolated resolution (CPR)
6,600
interpolated resolution (arc-sec/count)** 196.4
interpolated resolution (µrad/count)** 952
maximum speed* (RPM)
13090
x4
interpolated resolution (CPR)
10,000
interpolated resolution (arc-sec/count)** 129.6
interpolated resolution (µrad/count)** 628.3
maximum speed* (RPM)
8640
x4
interpolated resolution (CPR)
16,384
interpolated resolution (arc-sec/count) ** 79.1
interpolated resolution (µrad/count)** 383.5
maximum speed* (RPM)
5273
x4
interpolated resolution (CPR)
32,768
interpolated resolution (arc-sec/count)** 39.6
interpolated resolution (µrad/count)** 191.7
maximum speed* (RPM)
2637
x4
interpolated resolution (CPR)
65,536
interpolated resolution (arc-sec/count)** 19.7
interpolated resolution (µrad/count)** 95.9
maximum speed* (RPM)
1318
x100
165,000
7.85
38.0
10470
x100
250,000
5.18
25.1
6912
x100
409,600
3.16
15.3
4219
x100
819,200
1.58
7.7
2109
x100
1,638,400
0.791
3.83
1054
x256
422,400
3.08
14.85
4090
x256
640,000
2.03
9.8
2700
x256
1,048,576
1.24
6.0
1648
x256
2,097,152
0.618
3.0
824
x256
4,194,304
0.309
1.5
412
0.750” [19.05mm]
2500 CPR
1.250” [31.75mm]
4096 CPR
2.250” [57.15mm]
8192 CPR
4.250” [107.95mm] 16384 CPR
*Maximum speed produces an encoder quadrature output of up to 28.8 million states per second.
** Resolution values shown are approximate. To calculate exact resolution values, convert from CPR (Counts Per Revolution) to the desired units.
Note: Specifications assume XOR function which is available in all standard controllers.
To calculate desired rotary interpolation multiplier, use the following equation
Interpolation Multiplier = Desired Resolution (CPR) / Fundamental Scale Resolution (CPR)
All Specifications are subject to change. All data is accurate to the best of our knowledge. MicroE Systems is not responsible for errors.
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MICROESYS [ GSI Group, Inc. ]
