Mercury 1500P
PCB-Mount Digital Encoders
Factory Set Resolution to 0.50μm
Reflective Linear and Rotary Encoders
TM
Resolution
Factory Set:
Sensor the
size of a
Dime
x4, x8, x20, or x40
Linear: 5μm, 2.5μm, 1.0μm,
or 0.50μm
Rotary: 6,600 to 655,000 CPR
Accuracy
Linear: ± 1μm available
± 3μm to ± 5μm standard
Rotary: Up to ± 2.1 arc-sec
Output
A-quad-B and
Digital Index Window
The Mercury 1500P encoder is a digital 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. Engineers can
achieve dramatic improvements in system speed, throughput,
and reliability, while reducing cost, size and weight. The
Mercury 1500P series kit encoders make it all possible. The
digital output sensors 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.
Table of Contents
System & Sensor pg . 2
Specifications pg 3 -4
Scales pg . 5 - 6
O
rdering Information pg. 6
Standard Features
• Small PCB mount sensor
• Sensor is 5.6mm (H) x 12.7mm (W) x 15.2mm (L) and weighs 2.6g
• Resolution:
Linear 5, 2.5, 1.0, 0.5µm;
Rotary 6,600 to 655,000 CPR
• Digital Differential Outputs: A-quad-B and Index window
• Bi-directional Index window signal
• Index mark at the center or end of the glass scale (linear)
Optional features
• 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: Mercury 1500P is even smaller at 5.6mm sensor height
Page 2 of 5
System Specifications
Resolution and Maximum Speed
Mercury 1500P systems have factory set interpolation: x4, x8, x20, x40. Below is the table of available resolutions.
Linear - 20μm grating pitch
Interpolation
Resolution
Maximum Speed
x4
x8
x20
x40
5.000µm/count
2.500µm/count
1.000µm/count
0.500µm/count
7200mm/s
7200mm/s
7200mm/s
7200mm/s
Rotary - 20μm grating pitch
Rotary
Glass Scale
Diameter
Fundamental
Resolution
Interpolation
Below is a table of the available resolutions
.
0.472” [12.00mm]
1650 CPR
interpolated resolution (CPR)
interpolated resolution (arc-sec/count)*
interpolated resolution (µrad/count)*
maximum speed (RPM)
x4
6,600
196.4
952
13090
x4
10,000
129.6
628
8640
x4
16,384
79.1
383
5273
x4
32,768
39.6
191.7
2637
x8
13,200
98.2
476
13090
x8
20,000
64.8
314
8640
x8
32,768
39.6
191.7
5273
x8
65,536
19.78
95.8
2637
x8
131,072
9.89
47.9
1318
x20
33,000
39.2
190.3
13090
x20
50,000
25.9
125.6
8640
x20
81,920
15.82
76.6
5273
x20
163,840
7.92
38.3
2637
x20
327,680
3.96
19.16
1318
x40
66,000
19.64
95.2
13090
x40
100,000
12.96
62.8
8640
x40
163,840
7.91
38.3
5273
x40
327,680
3.96
19.17
2637
x40
655,360
1.978
9.58
1318
0.750” [19.05mm]
2500 CPR
interpolated resolution (CPR)
interpolated resolution (arc-sec/count)*
interpolated resolution (µrad/count)*
maximum speed (RPM)
1.250” [31.75mm]
4096 CPR
interpolated resolution (CPR)
interpolated resolution (arc-sec/count)*
interpolated resolution (µrad/count)*
maximum speed (RPM)
2.250” [57.15mm]
8192 CPR
interpolated resolution (CPR)
interpolated resolution (arc-sec/count)*
interpolated resolution (µrad/count)*
maximum speed (RPM)
4.250” [107.95mm] 16384 CPR
x4
interpolated resolution (CPR)
65,536
interpolated resolution (arc-sec/count)* 19.78
interpolated resolution (µrad/count)*
95.8
maximum speed (RPM)
1318
* 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.
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 6
System Specifications
System
Grating Period
20µm
System Resolution 5µm, 2.5µm, 1.00µm, or 0.50µm (linear)
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
*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.
**Or +/- one quadrature count, whichever error value is greater.
Mercury 1500P Outputs
10-pin interface
PIN
1
2
3
4
5
6
7
8
9
10
FUNCTION
B-
B+
Sin + *
Cos + *
+ 5 V DC
Index Window +
Index Window -
A+
A-
Ground
Rotary Accuracy* Scale O.D.
12.00mm
19.05mm
31.75mm
57.15mm
107.95mm
Microradians**
±100
±63
±38
±19
±10
Arc-Seconds**
±21
±13
±7.8
±3.9
±2.1
*Based on ideal scale mounting concentricity
**Or +/- one quadrature count, whichever error value is greater.
* Analog outputs are for sensor alignment only.
Output Signals**
Sensor Size
W:
L:
H:
12.70mm
15.24mm
5.59mm
0.500"
0.600"
0.220"
Pins 8 & 9
Pins 2 & 1
A
B
Quadrature TTL
Operating and Electrical Specifications
Power Supply
Temperature
Operating:
Storage:
Humidity:
Shock:
Sensor Weight:
5VDC ±5% @ 33mA1
Resolution
0 to 70°C
-20 to 70°C
10 - 90% RH non-condensing
1500G 0.5 ms half sine (Sensor)
2.6g
Index Window
20µm Typical
Pins 6 & 7
5VDC
** Inverse signals not shown for clarity.
1 Note: a voltage regulator on the customer’s printed circuit board, such as Analog
Devices’ ADP 3334 or equivalent, is recommended at the 5V input to the encoder
for maximum reliability.
Alignment Signals
20µm
Pins 3 & 4
800mVp-p ± 25%
on a 1.7V DC off-
set.
Mechanical Information - Sensor
.126 3.21
PI N 1
.050 1.28
PIN SP ACING
PI N 5
90°
.600 15.24
.069 1.75
2X 0-80UNC-2B
THRU.
.295 7.49
.344 8.75
.500 12.70
.148 3.76
.162 4.11
.220 5.59
.330 8.38
PI N 10
.183 4.65
PI N 6
.096 2.44
4X R.047 1.19
.348 8.85
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 6
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 5 of 6
Embedded System
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