Data Sheet - MicroE Systems

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Smallest Sensor, Lowest System Height, Smallest TapeScale System, Broader Alignment Tolerances, and MoreWhy Mercury II Encoders Make It Easier To Design High Performance Into Your EquipmentMercury II Can Reduce System Size and CostMercury II’s system height with tape scale is 36% shorter than competitiveencoders, making it easier to fit into your design. This reduction can also cutmotion system weight and cost by allowing the use of smaller motors and stages.This significantly relaxes mechanical system tolerances, while reducing systemcosts. Mercury II’s optical index marker is placed within the 6mm width of thetape scale, saving even more space by eliminating external index and tapescale carrier bulk.Smallest Tape Scale System16mm15.3mm6.0mmLowest System HeightMercury II10.1mmBrand X18.2mmMechanical Dimension Comparison*Mercury II Brand X Brand Y Mercury II vs.with Tape ScaleBest CompetitorSystem height 10.1mm 18.2mm 15.8mm 56% betterSensor Z height 8.7mm 12mm 14.8mm 38% betterStandoff tolerance ± 0.15mm ± 0.1mm ± 0.1mm 50% betterTape scale width** 6.0mm 16.0mm 15.3mm 155% better*Based on published specifications**Tape scale system width including indexBrand Y15.8mmTheta Z Alignment ToleranceEliminate the Frustration of Touchy Encoder AlignmentMercury II Solves this Problem for Good± 0.006°± 0.5°Fussy alignment is no longer a concern. With Mercury’s patented PurePrecision optics,advanced SmartPrecision II electronics and LED alignment indicators, you can push thesensor against your reference surface, tighten the screws and you’re finished. Try thatwith Brand X or Y.This performance is possible thanks to relaxed alignment tolerances, particularly in thetheta Z axis. Mercury II offers a ± 2° sweet spot – that’s a 300% improvement over thebest 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 tointegrate into your designs.± 2°Page 4Alignment Tolerance Comparison*Mercury II*** Brand X Brand Y Mercury II vs.Best Competitortheta Z ± 2.0° ± 0.006° ± 0.5 Mercury is 300% bettertheta Y ± 1.0° unspecified ± 1.0°theta X ± 1.0° ± 0.1° ± 1.0°*Based on published specifications***Measured at a constant temperature for one axis at a time with all other axes at their ideal positions.
System SpecificationsSystemScales:• Cut-to-length PurePrecision laser tape scale - available in continuouslengths up to 30m• Linear glass scales for high accuracyGrating Period 20μmSignal Period 20μmSystem Resolution 5μm - 1.2nm; determined by customer electronicsLinear accuracy*Laser Tape ScaleGlass ScalesShort-travel Determined by correction of gain mismatch, offset and phase inAccuracy the customer electronicsLong-travel ± 5μm/m after two- High accuracy grade:Accuracy point linearization ≤ ±1μm for scalesin the customer’sup to 130mmcontroller≤ ±2μm for scalesfrom 130mm to 1mStandard accuracy grade:≤ ±1.5μm for scalesup to 130mm≤ ±5μm for scalesfrom 130mm to 1mSensor SizeW: 13.49mm 0.531"L: 32.00mm 1.260"H: 8.73mm 0.344"Operating and Electrical SpecificationsPower Supply: 5VDC ±5% @ 48mA when used withrecommended termination (see installation manual)TemperatureOperating: 0 to 70°CStorage: -20 to 85°CHumidity:10 to 90% RH non-condensingEMI:CE CompliantShock:300G 0.5 ms half sineVibration:30G at 17HzSensor Weight: 6g (Sensor without cable)Sensor Cable: Double ShieldMaximum length: 20m (contact <strong>MicroE</strong> <strong>Systems</strong> forapplications >5m)Diameter: 3.6mm (0.142”)Flex Life: 20 x 10 6 cycles @ 20mm bending radius*Maximum error over the specified movement when compared to aNIST-traceable laser interferometer standard, used at room temperature.Index: stick-on optical marker can be placed anywhere;bi-directional, full speed.Reliability Information5 year Expected Reliability: >99.8% under normaloperating conditions.DIRECTION "A"5.C8.30INDEX MARKERREGION7.DC1BTAPE SCALE SHOWN IN THIS VIEW TRANSLATED IN X-AXI SOUT OF OPERATING RANGE FOR CLARITY6.00B27.006.752.50C3.84A2.6222.864X R2.79B2B16.79.00±0.0814.25ASENSOR MOUNTING SURFACE3.842.03TAPE SCALE MOUNTING SURFACE2.0727.00±0.08SENSOR MOUNTING PLATE RECOMMENDATIONM2.5 OR 2-56UNC-2BTHRU., 2XMETAL TAPE SCALE3.380.29ADHESIVE BACKING(TAPE SCALE MOUNTING SURFACE)27.004X R0.764X R2.3913.702.502.24B13.499.006.OPTICAL C L21.594.952X2.79 THRU.32.00CNOTE:Sensor shown with tape scale. Refer to the Mercury II interface drawings for additional dimensional details and important notes.Page 5
Page 1 and 2: Mercury II 1900The Next Generation
Page 3: MII 1900 System Features at a Glanc
Page 7 and 8: SmartPrecision II SoftwareSetup Me
Page 9 and 10: PurePrecision Laser Tape Scale wit
Page 11 and 12: Linear Glass Scales with Stick-on I
Page 14: How to Order Mercury II Encoder Sy

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