Mercury
TM
1200
PCB-Mount Analog Encoders
For Customer Interpolation- Resolution to
0.078μm
Reflective Linear and Rotary Encoders
Resolution
Sensor the
size of a
Dime
Determined by Customer
Electronics
Linear: 20μm to 0.078μm
Rotary: 2,500 to 4.2M CPR
Accuracy
Linear: ± 1μm available
± 3μm to ± 5μm standard
Rotary: Up to ± 2.1 arc-sec
Output
Analog Sine/Cosine and
Index Window
System Resolution
The Mercury 1200 encoder is an analog output system. Designed for PC board mounting, it is available with linear or rotary scales.
Mercury’s space-saving, integrated configuration gives OEM system designers a breakthrough in performance.
Imagine what you can do with this!
OEMs can now use encoders for closed loop control where
it was previously not possible or cost effective. Using your
interpolation electronics, engineers can achieve dramatic
improvements in system speed, throughput, and reliability,
while reducing cost, size and weight. The Mercury 1200 series
kit encoders make it all possible. The analog output sensors
can mount directly on your printed circuit board within an EMI
shielded module. The low Z height of the sensor, only 5.6mm,
opens up exciting design possibilities.
OEMs that want to incorporate our interpolation electronics
can contact MicroE for chip set or daughterboard solutions.
Table of Contents
System & Sensor pg . 2
Scales pg . 4 - 5
O
rdering Information pg. 5
Optional features
Standard Features
• Small PCB mount sensor
• Sensor is 5.6mm (H) x 11.9mm (W) x 14.9mm (L) and weighs 1.2g
• Fundamental resolution: Linear 20µm; Rotary 2,500 - 16,384 CPR
Interpolated linear resolution up to 0.078µm;
Rotary resolution 2,500 CPR to 4.2M CPR
• Analog output: sine/cosine and Index window
• Bi-directional Index window signal
• Index mark at the center or end of the glass scale (linear)
• Glass scale length or diameter:
Linear lengths from 5mm to 2m
Rotary diameters from 12mm to 108mm
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 it’s standoff tolerance is 50% greater than the best alternative.
This significantly relaxes mechanical system tolerances,
while reducing system costs.
Standoff Clearance
Mercury
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
**Based on published specifications
0.5mm
± 0.1mm
* Dimensions shown illustrate encoder system standoff clearance; see Mercury
Encoder Interface Drawings for correct design reference surfaces.
Note: Mecury 1200 is even smaller at 5.6mm sensor height
Page 2 of 5
System Specifications
System
Grating Period
20µm
Signal Period
20µm
System Resolution Fundamental resolution: Linear 20µm; Rotary 2,500 - 16,384 CPR
Interpolated resolution determined by customer electronics:
Linear: 20µm - 0.078µm; rotary: 2,500 to 4.2M CPR
Linear Accuracy* Better than ±1µm available; contact MicroE
Better than ±3µm up to 130mm, ±5µm from 155mm to 1m,
±5µm per meter from 1m to 2m
Rotary Accuracy* Scale O.D.
12.00mm
19.05mm
31.75mm
57.15mm
107.95mm
*Based on ideal scale mounting concentricity
Analog Output
Pins 1,2,3 and 4
20µm
*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.
Microradians
±100
±63
±38
±19
±10
Arc-Seconds
±21
±13
±7.8
±3.9
±2.1
1.6 V pp
(Differential)
Across 2k
Ω
resistor
90°
Mercury 1200 Outputs
10-pin interface
PIN
1
2
3
4
5
6
7
8
9
10
FUNCTION
Sine +
Sine -
Cosine +
Cosine -
+ 5 V DC
Reserved - Do Not Connect
Reserved - Do Not Connect
Index Window -
Index Window +
Ground
Sensor Size
W:
L:
H:
Power Supply
Temperature
Operating:
Storage:
Humidity:
Shock:
Sensor Weight:
12.70mm
15.24mm
5.59mm
0.500"
0.600"
0.220"
Operating and Electrical Specifications
5VDC ±5% @ 33mA
0 to 70°C
-20 to 70°C
10 - 90% RH non-condensing
1500G 0.5ms half sine
2.6g ( Sensor without cable )
Maximum Speed
Scale Length/Diameter
Linear
All Lengths
Rotary
0.75”
1.25”
2.25”
4.25”
*Assumes customer electronics have adequate bandwidth
Maximum Speed*
7200mm/s
8640 RPM
5273 RPM
2637 RPM
1318 RPM
Index Window
Pin 9
20µm Typical
5VDC
Mechanical Information - Sensor
.127 3.22
PIN 1
.050 1.28
PIN SPACING
PIN 5
.600 15.24
.069 1.75
2X 0-80UNC-2B
THRU.
.295 7.5
.344 8.75
.500 12.70
.148 3.76
.162 4.11
.220 5.59
.330 8.38
PIN 10
.183 4.65
PIN 6
.096 2.44
.348 8.85
4X R.047 1.19
All Specifications are subject to change. All data is accurate to the best of our knowledge.
MicroE Systems is not responsible for errors.
Page 3 of 5
Scale Specifications
Standard and Customized Scales
MicroE Systems offers a wide array of chrome on glass scales for the highest accuracy and best thermal stability. Easy to install, standard
linear and rotary scales meet most application requirements. Customized linear, rotary, and rotary segment scales are available where need-
ed. All scales include an optical index. Mercury's glass scales save time by eliminating motion system calibrations or linearity corrections
required by other encoders, and provide better thermal stability than metal tape scales.
Options include:
•
Standard linear:
18mm - 2m
•
Standard rotary:
12mm - 107.95mm diameter, with or without hubs
•
Custom linear*:
special lengths, widths, thickness, index mark locations and special low CTE materials
•
Custom rotary*:
special ID's, OD's (up to 304.8mm), index mark outside the main track and special low CTE materials
•
Mounting of hubs for rotary scales:
MicroE Systems can mount and align standard, custom, or customer-supplied hubs
•
Rotary segments*:
any angle range; wide range of radius values
*Custom scales or rotary segments are available in OEM quantities. Contact your local MicroE Systems sales office.
Standard Short Linear Scales
130mm and Shorter
Key: inches[mm]
0.036 [0.9]
Scale Length
Measured Length
is always 5 mm less
then total length
0.250 [6.35]
End Index
Center Index
Model
Scale Length
Measured Length
L18
0.709 [18]
0.512 [13]
L30
1.181 [30]
0.984 [25]
L55
2.165 [55]
1.969 [50]
±3µm standard
±1µm available
Material
Soda lime glass
Typical CTE
8ppm/°C
Index
Center or End
L80
L105
L130
3.150 [80]
4.134 [105]
5.118 [130]
2.953 [75]
3.937 [100]
4.921 [125]
Specifications
Accuracy
Custom scales available
Standard Long Linear Scales
155mm and Longer
Key: inches[mm]
0.098 [2.5]
Scale Length
Measured Length
is always 5 mm less
then total length
0.787 [20.00]
Center Index
Specifications
Accuracy
Material
Typical CTE
Index
End Index
±5 µm <1m
±5 µm/m >1m
Soda lime glass
8ppm/°C
Center or End
Model
Scale length
Measured length
L155
6.102 [155]
5.906 [150]
L225
8.858 [225]
8.661 [220]
L325
12.795 [325]
12.598 [320]
L425
16.732 [425]
16.535 [420]
L525
20.669 [525]
20.472 [520]
L1025
L2025
40.354 [1025] 79.724 [2025]
40.157 [1020] 79.528 [2020]
Custom scales available
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 5
Standard Rotary Scales
HUB THICKNESS
SCALE
PATTERN
SCALE O.D.
HUB I.D.
MOUNTING
HOLES
OPTICAL DIAMETER
Specifications
Material
Typical CTE
Soda lime glass
8ppm/°C
Key: inches[mm]
Model No.
Scale Outer
Diameter
Scale Inner
Diameter
Optical
Diameter
Hub Inner
Diameter
+.0005/-0.0000
Hub
Thickness
Fundamental
CPR
R1206
R1910
R3213
R5725
R10851
0.472 [12.00]
0.750 [19.05]
1.250 [31.75]
2.250 [57.15]
4.250 [107.95]
0.250 [6.35]
0.375 [9.52]
0.500 [12.70]
1.000 [25.40]
2.000 [50.80]
0.413 [10.50]
0.627 [15.92]
1.027 [26.08]
2.053 [52.15]
4.106 [104.30]
0.1253 [3.18]
0.1253 [3.183]
0.2503 [6.358]
0.5003 [12.708]
1.0003 [25.408]
0.040 [1.02]
0.040 [1.02]
0.050 [1.27]
0.060 [1.52]
0.080 [2.03]
1650
2500
4096
8192
16384
Custom scales available
How to Order Mercury 1200 Encoder Systems
To specify your Mercury encoder with the desired scale, consult the chart below to create the correct part number for
your order. Call MicroE Systems’ Rapid Customer Response team for more information
[508] 903-5000.
Example (linear): M1200-L55-C1 (Rotary): M1200-R3213-HB
M1200
M1200
–
Scale Model – Scale Mounting
Lxxx or Rxxxx
For Linear Scales:
T = Tape Mounting
C1 = 3 scale clamps*
C2 = 10 scale clamps**
Hubs for Rotary Scales:
NH = No hub
HE = for R1206
HA = for R1910
HB = for R3213
HC = for R5725
HD = for R10851
* 3 clamps come standard with linear scales up to 130mm
** 10 clamps come standard with linear scales 155mm or longer
All Specifications are subject to change. All data is accurate to the best of our knowledge.
MicroE Systems is not responsible for errors.
M1200 Rev H
© 2008 MicroE Systems
MicroE Systems – World Headquarters: 125 Middlesex Turnpike • Bedford • MA 01730
www.microesys.com • info@microesys.com • T. [781]-266-5700 • F. [781]-266-5112
Page 5 of 5
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