Mercury
2000
Smart Encoder Systems
Programmable Interpolation in Integer Steps to 0.078μm
Reflective Linear and Rotary Encoder Systems
TM
Next Generation Ruggedized
Design Replaces Mercury 2100
New design for more
robust performance
Resolution
Linear: 5μm to 0.078μm
Rotary: 6,600 to 4.2M CPR
Accuracy
Linear: ± 1μm available
± 3μm to ± 5μm standard
Rotary: Up to ± 2.1 arc-sec
Output
A-quad-B and Index Pulse
Sensor the
size of a dime
The New Mercury 2000 encoder represents the next level of encoder performance. With programmable interpolation, smallest sensor size,
easiest alignment, and superior noise immunity, the M2000 delivers Best-in-Class performance.
Imagine what you can do with this!
The new Mercury 2000 can reduce the cost and size of your system, and improve
its performance all at once! MicroE Systems’ Mercury 2000 kit encoders are
smaller, higher performance, faster to install, and easier to set up and align than
any other encoder. The tiny sensor fits into very tight spaces and works in both
linear and rotary applications.
Table of Contents
System & Sensor
SmartPrecision Electronics
SmartPrecision Software
Scales
O
rdering Information
pg 1-5
pg 6-7
pg 8
pg 9
pg 10
New features
• New metal enclosure for SmartPrecision
™
electronics
Best-in-Class noise immunity for harsh environments
Shorter length for smaller, tighter cabinets
Frame mounting compatible for easy installation
Robust metal housing with easy access locking screws
• Double shielded long life cable
• CE compliant
Optional features
• Glass scale length or diameter
Linear lengths from 5mm to 2m
Rotary diameters from 12mm to 108mm
• Cable length of 0.5m, 1m, 2m, or custom
• SmartPrecision Software
Standard features
• Smallest sensor- 1/3 the size of other encoders
• Revolutionary bolt-in alignment for many applications
• Advanced SmartPrecision electronics built into shielded D-sub connector
• A-quad-B output with programmable interpolation in integer steps
for resolutions to 0.078µm (linear); 4.2M CPR (rotary)
• LED set up indicators for sensor alignment and index location
• Bi-directional index signal is repeatable to encoder resolution
System Configurations
Standard and Optional Equipment
M2000 Smart Encoder Systems
Standard Equipment
Encoder Sensor
M10
Same for linear and
rotary scales.
Sensor Cable
The standard cable is
double shielded and
available in lengths of
0.5m, 1m or 2m.
SmartPrecision
™
Electronics
Module
New Metal Enclosure Provides
Best-in-Class Noise Immunity
A 15 pin high density
D-sub connector mates
to the customer controller.
RS 232 Interface
Adapter
The adapter provides
connections to a PC,
the encoder system
and the controller.
M2000
Optional Equipment
SmartPrecision
™
Software
The software module enables
all programmable and diagnostic
features plus displays encoder
output and signal strength.
See page 8 for details.
Page 2 of 10
Broader Alignment Tolerances,
Increased Standoff Clearance, Smallest Sensor and More
Why Mercury Encoders Make It Easier To Design High Performance Into Your Equipment
Eliminate the Frustration of Touchy
Encoder Alignment
Mercury Solves this Problem for Good
Fussy alignment is no longer a concern. With Mercury’s
patented PurePrecision
™
optics, advanced SmartPrecision
™
electronics and LED alignment indicators, you can push the
sensor against your reference surface, tighten the screws and
you’re finished. Try that with brand X or Y.
This performance is possible thanks to relaxed alignment
tolerances, particularly in the theta Z axis. Mercury offers a
± 2° sweet spot– that’s a 300% improvement over the best
competitive encoder. And that will result in dramatic savings
in manufacturing costs.
No other commercially available encoder is easier to align,
easier to use, or easier to integrate into your designs.
Theta Z Alignment Tolerance
± 2°
± 0.5°
± 0.006°
Mercury
Brand Y
Brand X
Alignment Tolerance Comparison**
Z Standoff
Y
theta X
theta Y
theta Z
Mercury*
± 0.15mm
± 0.20mm for linear
_
± 0.10mm for rotary > 19mm dia.
± 1.0°
± 2.0°
± 2.0°
Brand X
± 0.1mm
± 0.1mm
unspecified
± 0.1°
± 0.006°
Brand Y
± 0.1mm
unspecified
± 1.0°
± 1.0°
± 0.5°
Mercury vs. Best Competitor
Mercury is 50% better
Mercury is 100% better
Mercury is 100% better
Mercury is 300% better
*Measured at a constant temperature for one axis at a time with all other axes at their ideal positions.
**Based on published specifications
Mercury Can Reduce System Size and Cost
Mercury’s sensor height is 44% shorter than competitive encoders,
making it easy to fit into your design. This reduction can also cut total
system weight and cost by allowing the use of smaller motors and
stages. Safe system operation is also enhanced thanks to Mercury’s
generous standoff clearance– 200% greater than other encoders.
And its standoff tolerance is 50% greater than the best alternative.
This significantly relaxes mechanical system tolerances,
while reducing system costs.
Mercury
Standoff Clearance
2.4mm*
± 0.15mm
Brand Y
Mechanical Dimension Comparison**
Sensor Z height
Standoff clearance
Standoff tolerance
System height
Mercury Brand X Brand Y Mercury vs.
Best Competitor
8.4mm 23mm 15mm
44% better
2.4mm 0.5mm 0.8mm 200% better
± 0.15mm ± 0.1mm ± 0.1mm 50% better
11.7mm 28.5mm 15.8mm 26% better
Brand X
0.8mm
± 0.1mm
0.5mm
± 0.1mm
* Dimensions shown illustrate encoder system standoff clearance; see Mercury
Encoder Interface Drawings for correct design reference surfaces.
**Based on published specifications
Page 3 of 10
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.
Page 4 of 10
System Specifications
System
Grating Period
20µm
Signal Period
20µm
System Resolution 5µm - 0.078µm in integer interpolation steps (factory set or user
programmed using MicroE SmartPrecision Software)
Linear accuracy*
Interpolation
accuracy:
Better than ± 0.12µm over any 20µm movement
Long-travel
accuracy:
±1µm accuracy available - consult MicroE
Better than ± 3µm for scales up to 130mm
Better than ±5µm for scales 155mm to 1m
Better than ±5µm per meter for scales 1m or more
*Maximum peak to peak error over the specified movement when compared to a NIST-traceable laser interferometer standard,
used at room temperature and with MicroE interpolation electronics.
Rotary Accuracy* Scale O.D.
12.00mm
19.05mm
31.75mm
57.15mm
107.95mm
*Based on ideal scale mounting concentricity
Microradians
±100
±63
±38
±19
±10
Arc-Seconds
±21
±13
±7.8
±3.9
±2.1
Sensor Size
W:
L:
H:
12.70mm
20.57mm
8.38mm
0.500"
0.810"
0.330"
Operating and Electrical Specifications
Power Supply
Temperature
Operating:
Storage:
Humidity:
EMI:
Shock:
Sensor Weight:
Cable:
5VDC ±5% @ 330mA (30mA for sensor)
0 to 70°C
-20 to 70°C
10 - 90% RH non-condensing
CE Compliant
1500G 0.5 ms half sine (Sensor)
5.0g (Sensor without cable)
Double shield. Maximum length 2m. Diameter: 3.6mm (0.142”)
Flex Life: 20 x 10
6
cycles @ 20mm bending radius
Mechanical Information - Sensor
.272 6.91
.166 4.22
A
19.7 [500] or 39.4 [1000]
or 78.7 [2000] ±.50 [12.7]
A
SENSOR MTG. SURFACE
SENSOR MTG SURFACE
.058 1.47
.13 3.4
.037 0.94
.083 2.11
.155 3.94
.810 20.57
.405 10.29
.24 6.2
.334 8.5
.500 12.70
.345 8.75
.080 2.03
.650 16.5
C
B
.142 [3.61]
CABLE DIAMETER
All Specifications are subject to change. All data is
accurate to the best of our knowledge. MicroE
Systems is not responsible for errors.
2X
.106 2.69
THRU.
Page 5 of 10
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