MicroE Mercury II 6000 - Manual (Page 21)

Appendix
IM-Mercury_II_6000 Series Rev. 1 Page 20 ©2014 MicroE Systems
Mercury II 6000 Series Encoders
Installation Manual and Reference Guide
7.0 Appendix
7.1 Specifications
System Sensor Size
Scales
PurePrecision Marker Tape or Laser Tape scales -
available in continuous lengths up to 30m.
Linear glass scales for high accuracy.
Rotary glass scales for rotary applications. H: 8.23mm
W: 12.70mm
L: 22.61mm
Operating and Electrical Specifications
Grating Period 20µm Agency Standards Conformance: In accordance with
Electromagnetic Compatibility Directive 2004/108/EC:
EN 55011:2007, EN 61000-4-2, -3, -6
Signal Period 20µm SPI Interface Clock Speed: 25MHz - 50MHz
Max Sample Rate: 227,272 position reads/s - 50MHz clock
System
Resolution 5µm - 0.00122µm* in integer
interpolation steps (factory set or
user programmed using included
SmartPrecision II Software.
Power Supply: 5VDC ±5%
*Value rounded for readability. Use the formula
20µm/interpolation multiplier to calculate the
exact resolution in units of µm/count.
Note: MII6800Pa resolution is fixed at 1.22nm. @
@ 140mA (no outputs terminated)
180mA (A, B, I, and both limits
terminated); 50mA at the sensor
(MII6500/MII6700/MII6800)
Accuracy/Linearity
Cyclical Error
@ 172mA (all serial I/O connections
terminated); 50mA at the sensor
(MII6800Si/Pa)
Tape
Scales:
Glass
Scales: ± 30nm typical over any 20µm
movement
± 20nm typical over any 20µm
movement Temperature
Operating:
Storage:
0°C to 70°C
-20°C to 85°C
Tape Scale
Linearity:

± 5µm/m Humidity:
10 - 90% RH non-condensing
Glass Scale Accuracy EMI CE Compliant
High Accuracy
Grade:
 ±1µm for scales up to 130mm

±2µm for scales from130mm to 1m
Shock: 300G 0.5 ms half sine (Sensor)
Vibration:
30G @ 17Hz
Sensor
Weight: 3g (Sensor without cable)
Standard
Accuracy
Grade:

±1.5µm for scales up to 130mm

±5µm for scales from 130mm to
1m
Cable:
Double Shield
Maximum length: 10m (contact MicroE
Systems for applications >5m)
Diameter: 4.2mm
Flex Life: 20 x 10
6
cycles @ 20mm
bending radius
Note: Accuracy is the maximum error over the
specified movement when compared to a
NIST-traceable laser interferometer standard
used at room temperature.

Rotary
Accuracy*
Scale O.D. Microradians
Arc-
Seconds
Reliability Information
5 Year Expected Reliability: >99.8% under normal
operating conditions.
44.45mm ± 38 ± 7.8
63.50mm ± 19 ± 3.9
120.65mm ± 10 ± 2.1
Note: *Based on ideal scale mounting concentricity.
Index: Built-in or stick-on; bi-directional, full speed.
Note: After power up, the index mark must be passed once at

1 m/s for proper operation.
Limits: Separate built-in or stick-on left and right limits.
Laser-written embedded index and limits available. Contact MicroE.