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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.

Rotary - 20μm grating pitch

Rotary

Fundamental

Interpolation

Glass Scale

Resolution

Note: The range of available values is x4 to x256

Diameter

in integer steps; example values below.

0.472” [12.00mm]

1650 CPR

x4

x100

x256

interpolated resolution (CPR)

6,600

165,000

422,400

interpolated resolution (arc-sec/count)** 196.4

7.85

3.08

interpolated resolution (µrad/count)**

952

38.0

14.85

maximum speed* (RPM)

13090

10470

4090

0.750” [19.05mm]

2500 CPR

x4

x100

x256

interpolated resolution (CPR)

10,000

250,000

640,000

interpolated resolution (arc-sec/count)** 129.6

5.18

2.03

interpolated resolution (µrad/count)**

628.3

25.1

9.8

maximum speed* (RPM)

8640

6912

2700

1.250” [31.75mm]

4096 CPR

x4

x100

x256

interpolated resolution (CPR)

16,384

409,600

1,048,576

interpolated resolution (arc-sec/count) ** 79.1

3.16

1.24

interpolated resolution (µrad/count)**

383.5

15.3

6.0

maximum speed* (RPM)

5273

4219

1648

2.250” [57.15mm]

8192 CPR

x4

x100

x256

interpolated resolution (CPR)

32,768

819,200

2,097,152

interpolated resolution (arc-sec/count)** 39.6

1.58

0.618

interpolated resolution (µrad/count)**

191.7

7.7

3.0

maximum speed* (RPM)

2637

2109

824

4.250” [107.95mm] 16384 CPR

x4

x100

x256

interpolated resolution (CPR)

65,536

1,638,400 4,194,304

interpolated resolution (arc-sec/count)** 19.7

0.791

0.309

interpolated resolution (µrad/count)**

95.9

3.83

1.5

maximum speed* (RPM)

1318

1054

412

*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.

Linear - 20μm grating pitch

Interpolation

Resolution

Maximum Speed*

x4

5.000µm/count

7200mm/s

x10

2.000µm/count

7200mm/s

x20

1.000µm/count

7200mm/s

x50

0.400µm/count

7200mm/s

x80

0.250µm/count

7200mm/s

x100

0.200µm/count

5760mm/s

x200

0.100µm/count

2880mm/s

x250

0.080µm/count

2300mm/s

To calculate desired linear interpolation multiplier, use the following equation

Interpolation Multiplier = Grating Pitch (20µm) / Desired Resolution (µm/count)