O.P.S. Series Encoders

Transcription

1 RoHS O.P.S. Series Encoders Sensor Installation Manual and Reference Guide OPS-IM Sensor Installation Rev A MicroE Systems MicroE Page Systems Middlesex Turnpike Bedford, MA USA info@microesystems.com T

2 Table of Contents OPS Sensor Installation Introduction Introduction (Precautions, Patents, Manual Revisions)...3 Recommendations for Power, Installation Considerations...4 Items Required for Sensor Installation...4 OPS, Side Mount Configuration System Overview Diagram...5 Sensor Mounting Orientation and Tolerances...7 Sensor Head Installation...8 OPS, Top Mount Configuration System Overview Diagram...9 Sensor Mounting Orientation and Tolerances...10 Sensor Head Installation...11 OPS Alignment and Calibration (Side and Top Mount, Tape and Glass Scales) By OPS Alignment Tool...12 By SmartPrecision Software...15 Appendix A. Specifications...19 B. Wiring Diagrams...20 C. Interface Cable Requirements...21 D. RS-422 Compliance...22 E. Troubleshooting...23 F. Order Guide...24 Contacting MicroE Systems Contact MicroE...25 Page 2

3 Manual Version Numbers OPS-IM Sensor Installation Rev A, issued January 2014 Rev. A1 Changes: updated output frequencies in Appendix A, 01/12/2015 Related Documents -OPS Data Sheet -OPS Interface Drawing -PurePrecision Tape and Glass Scale Installation Manual for OPS Precautions 1 2 Follow standard ESD precautions. Turn power off before connecting the sensor. Do not touch the electrical pins without static protection such as a grounded wrist strap. Do not touch the tape/glass scale unless you are wearing talc-free gloves or finger cots. Please read this installation manual for full instructions. LASER SAFETY INFORMATION: OPS Series This product is sold solely for use as a component (or replacement) in an electronic product; therefore it is not required to, and does not comply with, 21 CFR and which pertain to complete laser products. The manufacturer of the complete system-level electronic product is responsible for complying with 21 CFR and and for providing the user with all necessary safety warnings and information. MicroE encoders contain an infrared laser diode or diodes. Emitted invisible laser radiation levels have been measured to be within the CDRH Class 1 range, which is not considered hazardous; however, to minimize exposure to the diverging beam, the encoder sensor should be installed in its operational configuration in close proximity to the encoder scale before power is applied. INVISIBLE LASER RADIATION DO NOT VIEW DIRECTLY WITH OPTICAL INSTRUMENTS (MICROSCOPES, EYE LOUPES OR MAGNIFIERS) Invisible laser radiation; wavelength: 850 nm Max power 4.8 mw CW CAUTION The use of optical instruments with this product will increase eye hazard. DO NOT VIEW DIRECTLY WITH OPTICAL INSTRUMENTS (MICROSCOPES, EYE LOUPES OR MAGNIFIERS). All maintenance procedures such as cleaning must be performed with the MicroE encoder turned off. Do not insert any reflective surface into the beam path when the encoder is powered. Do not attempt to service the MicroE encoder. RoHS OPS models are CE and RoHS compliant. Page 3

4 Recommendations for Power; Installation Considerations OPS Sensor Installation 1. Recommendations for Power OPS encoders require a minimum of 4.75VDC continuously. When designing circuits and extension cables, be sure to account for voltage loss over distance and tolerances from the nominal supply voltage so that at least 4.75VDC is available to the OPS encoder under all operating conditions. The input voltage should not exceed 5.25VDC. 2. Installation Considerations The OPS encoder is a precision electronic instrument. It has been designed to function in a wide range of applications and environments. To take full advantage of the modular system design, considerations should be made to allow easy access to the sensor for service and/or replacement. For optimal performance and reliability: DO follow standard ESD precautions while handling the sensor. DO allow proper alignment clearance for sensor head alignment. DO follow setup instructions for the encoder system. DO, where possible, install the scales in an upside down or vertical position to minimize accumulation of dust. DO consider redundant encoders or additional feedback devices as part of an overall risk management program for medical applications. DO NOT store sensors in an uncontrolled environment. DO NOT electrically overstress the sensor (Power supply ripple/noise). DO NOT intentionally hot swap the sensor if the device is energized. DO NOT use in high contamination applications (dust, oil, excessive humidity, or other airborne contaminants). Page 4

5 System Overview OPS Series Encoders Refer to encoder model data sheets for detailed ordering guide and more information about MicroE Part Numbers. Items Required for OPS Encoder Installation Hex wrench (M3.5 for Side Mount, 5/64" or M2.5 for Top Mount) Alignment Tool Kit (Model AT-OPS) For OPS-SM - Z height spacer shim (ships with each sensor mm (red) for use with tape scales mm (blue) for use with glass scales For OPS Top Mount - Z height spacer shim, ZG-PP1 for tape scales (black) - Z height spacer shim, ZG-GS1 for glass scales (white) Optional: MK-FFA bracket kit for installation into industry-standard mounting hole patterns. Page 5

6 System Overview, OPS Side Mount OPS Sensor Installation OPS TM Series, Side Mount Configuration System View Status LED 15 pin Standard D-sub connector Scale (shown mounted on a linear slide) With OPS Series Alignment Tool Expanded View Bracket mounting Screws (2x) 15 pin Standard D-sub connector Typical user-supplied sensor mounting bracket Sensor Mounting screws Sensor mounting slots (2x) Double shielded cable Bracket mounting holes (2x) Center stick-on index mark Page 6

7 Sensor Head Installation (Side Mount Configuration) OPS Series Encoders Sensor Mounting Orientation and Tolerances Axis diagram. q z OPS Side Mount Configuration Sensor Alignment Tolerances Axis X Y Z Alignment Tolerance Direction of Motion ± 0.20mm ± 0.15mm X Y q X ± 1.0 q Y ± 1.0 q Z ± 2.0 Z Page 7

8 Sensor Head Installation (Side Mount Configuration) OPS Series Encoders 1. Install the Sensor Use a wrench and M3 screws to install the sensor. Refer to interface drawing to make sure sensor is oriented properly with reference to the scale. 2. Verify Sensor Mounting Surface Height Refer to the OPS interface drawing for detailed dimensions. Use Z-Height spacer shim to verify that the Z-Height distance between the bottom surface of the sensor and the top of the scale is as follows: Tape Scales: Use red spacer (1.00mm) to set the proper Z-Height for PurePrecision Marker Tape II and Laser Tape II Scales Glass Scales: Use blue spacer (0.83mm) to set the proper Z-Height for PurePrecision Performance and Value Linear Glass Scales See step 3 below for installation steps. 3. Installation Steps X q z Z Axis Diagram Y Gently push the sensor and mounting against the top of the tape scale in the z-axis. 3.1 Loosen the sensor in the Z-axis 3.2 Place shim between the bottom of the sensor head and the top of the scale and press down in the Z-axis. Shim can be inserted either parallel or perpendicular to the scale. The shim features cut-outs to allow signal level to be monitored during sensor mounting. Rotational movement to remove shim. 3.3 Tighten the sensor in the Z-axis. 3.4 Carefully remove the shim by rotating it off the scale with the shim s handle. Page 8

9 System Overview, OPS Top Mount OPS Sensor Installation OPS TM Series, Top Mount Configuration System View Status LED Sensor (shown attached on a linear slide base with mounting bracket) Scale (shown mounted on a linear slide) With OPS Series Alignment Tool Expanded View Double shielded cable Mounting screws Sensor mounting holes (2) 15 pin Standard D-sub connector Typical user-supplied sensor mounting bracket Optional sensor benching pins (3) Center index mark Bracket mounting holes (2) Scale reference datum; example shown with benching pins Page 9

10 Sensor Head Installation (Top Mount Configuration) OPS Series Encoders Sensor Mounting Orientation and Tolerances Axis diagram. q z OPS Top Mount Configuration Sensor Alignment Tolerances Axis X Y Alignment Tolerance Direction of Motion ± 0.20mm X Z Y Z ± 0.15mm q X ± 1.0 q Y ± 1.0 q Z ± 2.0 Page 10

11 Sensor Head Installation (Top Mount Configuration) OPS Series Encoders 1. Verify Sensor Mounting Surface Height Refer to the OPS interface drawing for the latest dimensions. Verify that the Z-height distance between the sensor mounting surface datum A and the top of the scale is as follows: Tape Scales: Z-axis distance from top of tape scale after blue protective film is removed to Datum A of sensor: 3.09 mm ±0.15 Z-Height Gauge (Model number ZG-PP1) can be used to verify proper Z-Height for PurePrecision Marker Tape II and Laser Tape II scales Glass Scales: Z-axis distance from top of glass scale to Datum A of sensor: 2.93 mm ±0.15 Z-Height Gauge (Model Number ZG-GS1) can be used to verify proper Z-Height for PurePrecision Performance and Value Linear Glass Scales Use the correct gauge to check that there are no gaps between: 1.1 The mounting surface of the gauge and the mounting bracket, or 1.2 The bottom surface of the gauge and the scale. Place the gauge in position and use the mounting screws as guides. If the bottom of the gauge hits the scale, you will see the gap between the gauge bottom mounting surface and your mounting bracket surface. If you hand tighten the sensor mounting screws, there should be no gap between the tape scale and the bottom of the plastic gauge tool. Mounting bracket surface Scale top surface Z- Height Gauges Tape Scales: P/N: ZG-PP1 (Black) Glass Scales: P/N: ZG-GS1 (White) 2. Install Sensor Install the sensor on the mounting surface referencing the appropriate datum surface as shown on the Interface Drawing. Use two M2 or 2-56 screws to loosely affix the sensor. A benching edge is recommended to locate the sensor to meet the mechanical mounting tolerances. Refer to the Interface Drawing for recommended location and height of edge. Page 11

12 Sensor Alignment - by Alignment Tool OPS Series Encoders, Side and Top Mount Configurations OPS Alignment Tool Sensor 15-pin D-Sub connector (Side and top mount configurations; side mount shown.) Be sure the source power is off before connecting the SmartPrecision Alignment Tool to the sensor plug. 1. Connect the encoder (either Side Mount or Top Mount) to the SmartPrecision Alignment Tool. Connect the USB cable to either a computer s USB port or to the DC power supply provided. OPS Alignment Tool kit, Model Number AT-OPS (Includes SmartPrecision II Software) OPS Alignment Tool Use Universal Power supply with USB port for Alignment Tool power if not connecting to computer USB port. To OPS Series encoder sensor Mini USB computer interface cable (plugs into either power supply or computer) Page 12

13 Sensor Alignment - by Alignment Tool OPS Series Encoders, Side and Top Mount Configurations 2. Alignment Connect the USB cable to the Alignment Tool with power from either the Universal Power supply or computer USB port. The Alignment Tool Signal Level and Sensor head LEDs are now used for alignment. Proper alignment is indicated by green sensor head and Alignment Tool Signal Level LEDs. 3. Position the sensor over a section of the scale. Adjust the sensor's Y or q z directions until the Signal Level and sensor head LEDs are green. 4. Move the sensor across the entire length of travel. The LED should be green over the entire length of travel. If the LED is Yellow or Red, adjust Y and q z and refer to the interface drawing to ensure proper mechanical design. (Passing over an Index will cause the Alignment Tool Index/Limit LED to flash green.) OPS Side Mount Alignment Tool Green = Optimal Performance OPS Top Mount Sensor Indicator LED Yellow = Marginal Performance q z To align the sensor move it in the Y or qz directions Red = Improper Performance X Y Z NOTE: If you are having any difficulties getting a green light over the entire travel length, refer to the OPS interface drawing to check mechanical design. Also, check to make sure the scale is properly installed, the sensor is properly oriented with respect to the scale, and the blue protective film has been removed from the tape scales. Page 13

14 Sensor Calibration - by Alignment Tool OPS Series Encoders, Side and Top Mount Configurations Calibration, Index, and Limits 1. Press the Alignment Tool Cal button to start. (Be sure the sensor has been aligned to the scale, across the entire length.) Both the Alignment Tool Signal Level and Index/Limit LEDs will turn solid green. This starts the Gain Offset Phase (GOP) calibration. 2. Move the sensor back and forth anywhere on the scale, 10mm or more. This movement adapts and ends the GOP calibration when the Signal Level LED turns blue, with the Index/Limit LED solid green. 3. Index calibration: move the sensor back and forth across the index until both Signal Level and Index/Limit LEDs turn blue. (At this step, the Index has been calibrated and the left limit is ready to be calibrated.) NOTE: Correct orientation of the scale for Left/Right Limit calibration is shown below. The D datum edge from the OPS Interface Drawing is designated as the Top of the scale. The Index/Limit track is also the Top track on a scale (tape and glass). D D datum edge of scale = Top of the scale. Index/Limit Track Left side of scale Right side of scale 4. Left limit calibration: move the sensor over to the left limit area on the scale, with both Signal Level and Index/Limit LEDs solid blue. Push the Cal button. The Index/Limit LED will turn red. (At this step, the Left Limit has been calibrated and the right limit is ready to be calibrated.) 5. Right limit calibration: Move the sensor over to the right limit area on the scale with Signal Level LED solid blue and Index/Limit LED solid red. Push the Cal button. (At this step, the Right Limit has been calibrated.) Both the Signal Level and Index/Limit LEDs will quickly flash green 5 times to indicate that calibration has been completed. (Note: to skip a step, push and hold the Cal button for 2 seconds until LEDs change color, then release button.) Both Signal Level and Index/Limit LEDs flash green 5 times to indicate calibration complete. Page 14

15 Sensor Alignment and Calibration - by SmartPrecision II Software OPS Series Encoders, Side and Top Mount Configurations Install the OPS SmartPrecision II Software (included with Alignment Tool kit, AT-OPS): NOTE: Be sure the Alignment Tool is not plugged in to the computer USB while installing the software. The Alignment Tool needs to be plugged in after the software is installed, in order to properly load the USB driver. 1) Insert CD into drive. Installer should automatically start up and install SmartPrecision II software to C:\Program Files\MicroE Systems\SmartPrecision_OPS. 2) If it does not start automatically browse to CD and run setup.exe to install software. Install the USB Driver: Windows 2000: 1) Connect the USB cable between the host computer and the OPS Alignment Tool/OPS Sensor. 2) When the electronics are on, Windows will notify you it has found new hardware prompting you with a "Found New Hardware" wizard. Press the Next button. 3) Select "Search for a suitable driver for my device (recommended)" and press the Next button. 4) Select "Specify a location" under Optional search locations: and press the Next button. 5) Press the Browse button to locate the OPS.inf driver Installation file. It is located in the directory C:\Program Files\MicroE Systems\SmartPrecision_OPS. Once this file is selected press the OK button. 6) Verify that the correct path and filename are shown and press the Next button. 7) Press the Finish button. Windows XP, Vista, 7, and 8: 1) Connect the USB cable between the host computer and the OPS Alignment Tool/OPS Sensor. 2) When the electronics are on,, Windows will notify you it has found new hardware prompting you with a "Found New Hardware" wizard. 3) The wizard may prompt Can Windows connect to Windows Update to search for software? Select No, not this time and press the Next button. 4) Select "Install from a list or specific location (Advanced)" and press the Next button. 5) Select "Include this location in the search". 6) Press the Browse button to locate the MicroE_USB.inf driver installation file OPS.inf driver. It is located in the directory C:\Program Files\MicroE Systems\SmartPrecision_OPS. Once this file is selected press the OK button. 7) Verify that the correct path and filename are shown and press the Next button. 8) Press the Finish button. Using the Software: 1) To Run Software, go to directory C:\Program Files\MicroE Systems\SmartPrecision_OPS. Double-click OPS.exe. Page 15

16 Sensor Alignment - by SmartPrecision II Software OPS Series Encoders, Side and Top Mount Configurations Connect the encoder to the Alignment Tool before connecting USB cable. Connect the USB cable to the Alignment Tool Run SmartPrecision II Software 1. Align the sensor: SmartPrecision II software automatically begins in Alignment Mode, with AGC off. Position the sensor over a section of the scale. Adjust the sensor's Y or q z directions until the Signal Level is in the Optimal Green level. Move the sensor across the entire length of travel. The Signal Level should be in the Optimal Green level over the entire length of travel. If the Signal Level is in the Yellow or Red areas, adjust Y and q z and refer to the interface drawing to ensure proper mechanical design. (Passing over an Index will cause the Alignment Tool Index/Limit LED to flash green.) Check that Index LED blinks as sensor passes over index. Tighten sensor mounting screws. Sensor LED Indicator Indicates signal strength green for optimal performance, yellow for marginal performance, and red for improper performance. Sensor LED will blink as sensor passes over index. Alignment Mode is turned off automatically when you begin sensor calibration. NOTE: If you are having any difficulties getting a green light over the entire travel length, refer to the OPS interface drawing to check mechanical design. Also, check to make sure the scale is properly installed, the sensor is properly oriented with respect to the scale, and the blue protective film has been removed from the tape scales. Page 16

17 Sensor Calibration - by SmartPrecision II Software OPS Series Encoders, Side and Top Mount Configurations Note: all procedures below must be performed at 1m/s relative motion between the sensor and the scale. NOTE: Correct orientation of the scale for Left/Right Limit calibration is shown below. The D datum edge from the OPS Interface Drawing is designated as the Top of the scale. The Index/Limit track is also the Top track on a scale (tape and glass). D D datum edge of scale = Top of the scale. Index/Limit Track Left side of scale Right side of scale 1. Click appropriate checkboxes before calibrating: Calibrate GOP Calibrate Index Set Left Limit (optional) Set right Limit (optional) 2. Click Start Cal button. 3. Move the sensor back and forth (Gain Offset Phase). 4. Move the sensor back and forth over the Index until the Left Limit blue light turns on. (The Index is now calibrated.) Note: It is important that if you choose to calibrate only the limits, the sensor must be placed in the no limit area of the scale (neither the left or right limit) when you click the Start Cal button. Page 17

18 Sensor Calibration - by SmartPrecision II Software OPS Series Encoders, Side and Top Mount Configurations 5. Move the sensor to the Left Limit and click the Set button. 6. Move the sensor to the Right Limit and click the Set button. 7. Calibration complete. 8. Calibration Complete message will disappear after a few seconds, ending the calibration mode. SmartPrecision II will automatically revert to the mode in use prior to calibration. Note: It is important that if you choose to calibrate only the limits, the sensor must be placed in the no limit area of the scale (neither the left or right limit) when you click the Start Cal button. Page 18

19 Appendix A Specifications System OPS sensors are compatible with: - PurePrecision Marker Tape II and Laser Tape II - Linear and rotary glass scales Scale Pitch 20µm Signal Period 20µm System Resolution 1µm, 0.5µm, 0.1µm or 50nm (specify at time of ordering) Accuracy Linear Tape Scale Linear Glass Scale Typical slope error: 100ppm - Linearity: ±5µm/m 1 - Cyclical (interpolation) error: ±40nm 2 ±3µm/m total - Cyclical (interpolation) error: ±25nm 2 Rotary Glass Scale 3.9 arc-sec with 64mm OD scale 3 - Cyclical (interpolation) error: ±0.2 arc-sec 2 1 Achievable after two-point correction in the customer s controller. 2 Repeating error over any 20µm movement and does not accumulate. 3 Assumes perfect alignment of scale pattern to axis of rotation. Note: Accuracy is the maximum error over the specified movement when compared to a NIST-traceable laser interferometer standard used at 20 o C. Sensor Size & Weight (side mount sensor) Height Width Length 0.46 [11.67mm] 0.56 [14.30mm] 1.35 [34.25mm] Weight 8g (without cable) Reliability Information 5 Year Expected Reliability >99.8% under normal operating conditions Digital Output Signals Operating and Electrical Specifications Power Supply 5VDC 120mA when used with recommended termination, 80mA unterminated Temperature Operating 0 to 70 o C Storage -20 to 85 o C Humidity 10 to 90% RH non-condensing Agency Standards Conformance: In accordance with Electromagnetic Compatibility Directive 2004/108/EC: EN 55011:2007 EN , -3, -4, -6 Shock 300G 0.5 ms half sine Vibration 30G at 17Hz Sensor Cable Double Shield (contact MicroE Systems for applications >5m) Diameter 3.6mm (0.142") Flex Life 20x mm bending radius Standard 15 pin D-sub connector Outputs Digital A-quad-B, 1LSB index pulse, left and right limits. A, B and I signals are differential. Limits are single ended. Index is gated to AB high. Signal Level A/B/I (differential): RS-422 compatible Limits: 3.3VDC max., LVTTL compatible (High>2.4VDC, Low <0.4VDC), maximum current output (source and sink): 14mA Limits programmable as active high, active low or disabled Alarm: Tri-state of A, B and I outputs, latched for minimum 30ms Output Frequency (at maximum speed) OPS 200/400: 16.5Mhz per channel OPS 40: 5Mhz per channel OPS 20: 2.5Mhz per channel Note: Output frequency must not exceed maximum input frequency of customer electronics. Pins 14 & 6 Pins 13 & 5 Quadrature and Index A B Limits ³ 5mm ³ 5mm Left Limit Marker Right Limit Marker 0.6mm ± 0.3* 0.6mm ± 0.3* * With reference to the sensor s optical centerline (see interface drawings). Pins 12 & 4 I Left Limit Out Pin 11 Right Limit Out Pin 10 Inverse signals are not shown for clarity. Active low limit configuration is shown. Page 19

20 Appendix B Wiring Diagrams Connector Pin Configuration NOTE: GND and INNER SHIELD ARE INTERNALLY CONNECTED. Recommended Signal Termination Digital Outputs: A, B, I + OPS Series Encoder A, B, I - Cable Zo= 120 W 120 W Customer Electronics Standard RS-422 Line Receiver Circuitry Max cable length: 5m. Contact MicroE Applications Engineering if longer length required. Grounding Considerations Sensor mounted with good electrical contact to well grounded surface (preferred): INNER SHIELD: Insulated from outer shield, sensor case, and connector housing. Connected to circuit common internally as supplied by MicroE Systems POWER SUPPLY 5 Volts 0 Volts OUTER SHIELD: Connected to sensor and connector housing Electrically conductive mechanical connection (as supplied by MicroE Systems). Sensor mounted to poorly grounded or non-conducting surface: POWER SUPPLY 5 Volts 0 Volts Page 20

21 Appendix C Interface Cable Requirements 1. Customer Interface Cable Requirements Customer cables that interface to OPS series encoders must have the following characteristics: Twisted pair signal wiring. Characteristic impedance of ohms. Sufficient wire gauge to meet the minimum voltage requirement at the encoder, for example 24AWG gauge wire for a 2m length cable. Examples of acceptable cables with 24AWG gauge wire and 4 twisted pairs are Belden 9831, 8104, and 9844 or other manufacturer s equivalents. Single shield cable with a minimum of 90% coverage. Note that a double shielded cable may be required in high-noise applications. 2. Signal Wiring Each differential signal should be connected to a corresponding twisted pair as follows: OPS Series Signal Twisted Pair A+ Pair 1 A- B+ Pair 2 B- Index+ Pair 3 Index- +5V Pair 4 GND Left Limit Pair 5 Right Limit 3. Shield Termination: The customer's cable shield should be in 360 contact with the connector shroud and the connector shell to provide complete shielding. The connector shell should be metal with conductive surfaces. Suggested metal connector shells for use with OPS encoders: AMP or equivalent. The shield should be terminated as illustrated in the following diagram. Jacket Aluminum Polyester Shied Braided Shield Fold braided shield back over jacket. Example shows double-shielded cable. Dimensions shown are for illustration only. Page 21

22 Appendix D RS-422 Compliance The OPS Series is RS-422 compatible. Encoder signals are sending end terminated. Therefore customer receiving terminations are not required. If you elect to use them, the supply current will increase. Optional RS-422 compliant circuitry for long cable runs in harsh electrical environments is illustrated below. Page 22

23 Appendix E Troubleshooting Problem The Sensor LED indicator won t turn on. Solution Make sure that the OPS Series electronics 15-pin D-sub connector is fully seated and connected. Confirm that +5 Volts DC is being applied to the OPS Sensor. Refer to the OPS interface drawing for proper pinouts. Problem Can't get the OPS Series electronics "Signal" OPS better than red or yellow; or the green, Proper Alignment indicator doesn't stay illuminated over the full length of the scale. Solution Verify that the sensor is mounted in the correct orientation with reference to the scale and scale mounting reference edge. Refer to the Interface Drawing. Verify that the sensor has been aligned to the scale and that the mounting screws are tight. Check the dimensions for the mechanical mounting holes (and clamps if any) to make sure that the sensor is correctly located over the scale in the Y and Z dimensions. Refer to the Interface Drawing. Check that the scale is firmly mounted and can't jiggle or move in any direction. Make sure that the scale is clean over its entire length or circumference. Page 23

24 Appendix F Order Guide How to Order Sensor OPS-SM Scales PurePrecision Marker Tape II HPMT N A L 5000 I MK-FFA Limit Outputs 1 = Active Low 2 = Active High 3 = Disabled Cable Length* 1 = 1.0m 3 = 3.0m 5 = 5.0m All specifications subject to change. Interpolation (Resolution) 20 = x20 (1µm) 40 = x40 (0.5µm) 200 = x200 (0.1µm) 400 = x400 (50nm) SM = Side Mount (blank) = Top Mount * Custom cable lengths and connectors are available. Contact MicroE Applications Engineering. Sensor Installation Tools AT-OPS ZG-PP1 ZG-GS1 FlexFit Adaptor Alignment Tool Kit for OPS encoders includes Alignment Tool, SmartPrecision II Software, USB Cable, Power Supply (100V- 240VAC, US 2-prong plug) Z-Height Gauge, PurePrecision Tape Scales, Top Mount Sensor Z-Height Gauge, Glass Scales, Top Mount Sensor FlexFit Adaptor Mounting Kit. Reference design is available upon request. End Cap Kit, PurePrecision Tape Scales EC Optional Tape Scale End Caps Adaptor for Open Collector Limit Outputs MIIA-OCL Small DB15 adaptor to convert 3.3V left and right limit output signals to open collector type (7407). PurePrecision Laser Tape II HPTS N Performance and Value Linear Glass PVGL 1000 T Page 24 I = Individual Lengths C = Continuous reel with index and cut marks (unless otherwise specified) Length in mm (40mm - 30,000mm) For length >5000mm, contact MicroE for custom P/N. L = Center Index and End Limits I = Center Index Only C = Custom Length in mm (70mm - 30,000mm) T = Adhesive backing Length in mm (70mm - 1,000mm)** ** For lengths <70mm or >1m, contact MicroE Applications Engineering. Stick-on Index and Limit Markers (for Laser Tape II and Performance and Value Linear Glass Scales) NRIMS Qty. 8 Stick-On Index Markers NRLMS Qty. 4 Stick-On Left Limit Markers and Qty. 4 Stick-On Right Limit Markers Rotary Glass Contact MicroE Applications Engineering to discuss your requirements. Tape Scale Applicator Tools (use for lengths >300mm) TSAT-SM-PPT TSAT-PPT Tape Applicator Tool for OPS-SM, Side Mount Sensors Tape Applicator Tool for OPS, Top Mount Sensors

25 Contacting MicroE MicroE Systems is a world leader in optical encoder technology with offices in major industrial centers around the globe. To learn more about MicroE Systems products, visit: Our products have been used by thousands of companies worldwide to solve a wide range of motion control applications. Our advanced encoder technology and application expertise has driven innovations in the design of machinery, equipment and instrumentation in many industries, including medical, industrial, robotics, automation, metrology, semiconductor manufacturing, packaging equipment, entertainment, energy, military, and scientific research. MicroE Systems 125 Middlesex Turnpike Bedford, MA USA T F info@microesystems.com MicroE Systems Page 25

26 PurePrecision Tape and Glass Scale Installation for OPS Series Encoders Installation Manual and Reference Guide OPS-IM PurePrecision Scale Installation Rev A MicroE Systems MicroE Page Systems Middlesex Turnpike Bedford, MA USA info@microesys.com T

27 Table of Contents PurePrecision Scale Installation Introduction Introduction (Precautions, Patents, Manual Revisions)...3 Overview...4 Items Required for Scale Installation...4 Pre-Installation Information and Precautions...5 Design Guidelines for Side Mount and Top Mount Configurations...6 Mounting Surface Preparation for Side Mount and Top Mount Sensors...7 Cutting PurePrecision Tape Scales...8 Tape Scale, Lengths <300mm By Hand, for OPS Side Mount and OPS Top Mount...9 Tape Scale, Lengths >300mm By Applicator Tool, for OPS Side Mount...13 By Applicator Tool, for OPS Top Mount...19 Linear Glass Scales, OPS Top Mount Mounting Surface Preparation...25 Mounting Linear Glass Scales...26 Stick-On Index and Limit Marker Installation (Tape and Glass Scales) Packaging, Index and Limit Strips...27 Stick-on Index and Limit Installation...28 End Cap Installation (Tape Scales) End Cap Installation...31 Final Clean, Inspection, Cure Time, and Rework...32 Contacting MicroE Systems...33 Page 2

28 Manual Version Numbers IM-PurePrecision Scales OPS Rev A, issued January 2014 Changes: N/A Related Documents -OPS Data Sheet -OPS Sensor Installation Manual -OPS Interface Drawing Precautions 1 2 Follow standard ESD precautions. Turn power off before connecting the sensor. Do not touch the electrical pins without static protection such as a grounded wrist strap. Do not touch the glass scale unless you are wearing talc-free gloves or finger cots. Please read this installation manual for full instructions. RoHS OPS models are CE and RoHS compliant. Page 3

29 Overview Refer to encoder model data sheets for detailed ordering guide and more information about MicroE Part Numbers. This manual applies to the installation of the following scale types. PurePrecision Marker Tape II for OPS Series, Model HPMT- PurePrecision Laser Tape II for OPS Series, Model HPTS- PurePrecision Performance and Value Linear Glass Scales for OPS Series, Model - PVGL-T (adhesive backed) PurePrecision Rotory Glass Scales OPS Series, Model - RXXXX Items Required for PurePrecision Scale Installation You will need the following items available: Shears (recommend, Clauss, Item# 18003) 1 Tape Applicator Tool, for applications >300mm (not required for installations <300mm) 1 OPS Side Mount Configuration tool Model Number: TSAT-SM-PPT OPS Top Mount Configuration tool Model Number: TSAT-PPT Finger Cots or talc-free gloves 1, 2 Acetone or isopropyl alcohol 1, 2 Lint-free cotton cloths or wipes 1, 2 Index and Limit Marker stick-on sheets or Strips 1 (optional, for Laser Tape II and Precision and Value Glass scales): - Limit Marker Strips, Model Number: NRLMS - Index Marker Strips, Model Number: NRIMS End caps (optional) 1 Two-part epoxy (Tra-Con Tra-Bond 2116) 1, 2 Stick and disposable surface for stirring epoxy 1, 2 1 Items needed for PurePrecision Tape Scales 2 Items needed for Performance and Value Linear Glass Scales Page 4

30 Pre-Installation Information and Precautions Read all instructions completely before beginning the installation process. The PurePrecision Tape Scale is a precision metrological device. Handle it with the utmost care at all times. Avoid bending the tape scale to a radius less than 90mm (3.5 inches) Avoid twisting the PurePrecision Tape Scale. Do not let any sharp object touch the tape scale after the blue protective film is removed. The PurePrecision Tape Scale is protected by a blue film on the top that prevents contamination and damage to the grating pattern during installation. Once the adhesive on the tape scale is exposed (by removing the adhesive liner), do not touch the adhesive or allow any contamination to come into contact with it. PurePrecision Tape Scale, Index and Limit Markers are designed for one time installation only. If removed from the mounting surface for any reason, they should not be used for any kind of reapplication. This will affect the performance and reliability of the encoder system. Minimum storage radius 90mm (3.5 inches) The adhesive on the PurePrecision Tape Scale is permanent. Do not touch the adhesive once the adhesive liner is removed. Do not remove the tape scale from the mounting surface once it has been installed. Do not reinstall the tape scale if it has already been installed once. Avoid any contamination to the adhesive. Any particulate matter or other contamination that is trapped between the scale and the mounting surface will affect encoder performance. NOTE: MicroE does not recommend installing PurePrecision Tape Scale on a curved (cylindrical) surface. Page 5

31 Design Guidelines 1. Verify the tolerances of the scale's mounting surface given in the Interface Drawing. 2. Verify the dimensions of the scale benching edge (groove or straight edge) given in the Interface Drawing. 3. Calculate the length of PurePrecision Tape Scale required for your application. Refer to the Interface Drawing. Two kinds of temporary straight edge can be used - Type I (thin)- Temporary Straight Edge of thickness 0.76 ± 0.05 mm (0.030 ± inches). Refer to the Interface Drawing for additional dimensional requirements. A steel rule may be one of the options for this type of temporary straight edge. Type II (thick)- Temporary straight edge with minimum thickness 9.53mm (0.375 inches). Refer to the Interface Drawing for additional dimensional requirements. 4. Tape scales less than 300mm can be installed by hand against a straight edge. For lengths greater than 300mm, tape scale applicator tools are needed: Side Mount Configuration: Applicator tool Model Number: TSAT-SM-PPT Top Mount Configuration: Hand Grip Applicator tool Model Number: TSAT-PPT NOTE: See the appropriate section on Tape Applicator Tool installations. 5. If the tape scale is being installed into a 6mm grove, it must be installed by hand (regardless of scale length). Refer to the Interface Drawing. 6. If machining the mounting surface is undesirable, or not possible, a temporary straight edge can be used that meets the dimensions and tolerances specified in the Interface Drawing. Page 6

32 Mounting Surface Preparation 1. Inspect the mounting surface for any machining irregularities. MicroE Systems recommends a surface finish of better than 1.6 micrometers Ra. 2. The straight edge (either permanent or temporary) must be sharp on the benching side in order for the Applicator Tool to use it as a guide. In order for the tape scale to be mounted close to the straight edge, the maximum radius of mm (0.005 inches) should be used where the edge meets the bottom of the mounting surface. 3. Thoroughly clean the scale mounting surface and reference edge using a cotton swab or lint-free cloth dampened with isopropyl alcohol or acetone. Remove all dust and particles. 4. Mark the starting location on the mounting surface where the tape scale will be applied. Also mark the locations where the index and limit markers will be applied. Refer to the Interface Drawings to identify the reference points of the markers. Page 7

33 Cutting the PurePrecision Tape Scale 1. NOTE: When working with any encoder scale, it is important to use either finger Cots or talc-free gloves Uncoil the tape scale and cut it to the required length using shears. Note: check the interface drawing to make sure the scale is cut to the right length. Securely hold the tape scale close to the shear (at an approximate distance of 40mm [1½ inches]) near the point of cutting. Hand approximately at a distance of 40mm-50mm (1 1/2 inches to 2 inches) from the cutting point Shear held perpendicular to the tape scale (NOT INCLINED) Orient the tape scale perpendicular to the shear. Shear held inclined, not perpendicular, to the tape scale Cut the tape scale in a smooth, continuous motion. Page 8

34 Tape Scale, OPS Side/Top Mount Configurations Installation By Hand NOTE: For best system performance, talc-free gloves or finger cots should be worn during all steps of tape scale installation. Thoroughly clean the scale mounting surface and reference edge using a cotton swab or lint-free cloth dampened with isopropyl alcohol or acetone. Remove all dust and particles. 1. Scale direction/orientation Orient the scale such that the "arrowheads" on the blue protective film are pointing towards the mounting surface reference edge D as shown in the interface drawings for your sensor model. Refer to the correct model number Interface Drawing for reference edge D dimensions and sensor orientation. Download the latest Interface Drawing at D D = Mounting Surface Reference Edge LEFT RIGHT 2. Removing/peeling the bottom adhesive liner. PurePrecision Tape Scales have 3 layers, blue protective film, steel scale, and adhesive backing. Remove/peel back approximately 25mm (1 inch) of the bottom adhesive liner, taking care not to touch the adhesive or allow any particulate contamination. NOTE: Do not peel the blue protective film off at this time. Adhesive liner peeled off about 25mm (1 inch) from one end Page 9

35 Tape Scale, OPS Side/Top Mount Configurations Installation By Hand 3. Flip the tape over with the 25mm (1 inch) exposed adhesive surface facing down. Be sure not to touch or contaminate the exposed adhesive surface. Be sure the orientation arrows on the blue protective film point to the D reference edge. 4. Place the PurePrecision Tape Scale against the mounting surface D reference edge. Place the 25mm (1 inch) exposed adhesive end of the tape scale against the mounting surface D reference edge as shown and press firmly on the end. NOTE: Adhesive exposed by removing the adhesive bottom liner can touch the mounting surface only once. D reference edge as shown in the OPS interface drawing. Tape scale orientation arrows. Page 10

36 Tape Scale, OPS Side/Top Mount Configurations Installation By Hand NOTE: Be sure to keep the blue top protective film in place. 5. Install the PurePrecision Tape Scale along the remaining length of the mounting surface. Press the remaining tape on to the mounting surface with a sliding motion as shown below. Pull the adhesive liner out of the way during the sliding motion. NOTE: Make sure that the tape scale is tight against the D reference edge. Sliding motion of finger along the length of the tape Pull adhesive liner out of the way during sliding motion D reference edge as shown in the interface drawing. Page 11

37 Tape Scale, OPS Side/Top Mount Configurations Installation By Hand 6. Once the scale is applied to the mounting surface, and before the blue protective film is removed, it is recommended that even pressure be applied over the entire tape scale length by sliding a glove or cot protected finger across the scale. The applied pressure will ensure that the adhesive is evenly and permanently set. 7. Peel off the blue protective film. Start the peeling process using a sharp tool, being careful not to damage the scale. Pull off the remaining blue protective film. NOTE: After removing the blue protective film, the scale is ready for use and will perform to specification. The encoder will not function properly with the blue protective film installed. It must be removed for proper encoder operation. NOTE: If installing index/limits (Laser Tape II and PVGL glass), go to the Stick-On Index and Limit Marker Installation section. Page 12

38 Tape Scale, OPS Side Mount Configuration Installation By Mounted Applicator Tool NOTE: For best system performance, talc-free gloves or finger cots should be worn during all steps of tape scale installation. Thoroughly clean the scale mounting surface and reference edge using a cotton swab or lint-free cloth dampened with isopropyl alcohol or acetone. Remove all dust and particles. 1. OPS Side Mounted Tape Scale Applicator Tool (Model Number: TSAT-SM-PPT) The mounted application tool is needed for scale lengths greater than 300mm. It is mounted in the same fixture as the OPS Side Mount Sensor. Tape entry channel Tool contact cylinder knob Tool orientation arrows 2. Tape Scale Side Mount Applicator Tool orientation to the A reference sensor mounting surface. The A mounting surface is shown in the OPS interface drawing. The corresponding A reference mounting surface of the Applicator Tool is shown below. A OPS Side Mount Sensor Mounting Surface A Sensor Alternate Mounting Surface* A Applicator Tool Mounting Surface A Applicator Tool Alternate Mounting Surface* Mounting Surface A (see the OPS interface drawing) *The OPS-SM Tape Scale Applicator Tool, is designed to be mounted on either Sensor mounting surfaces. The proper orientation of the OPS-SM Applicator Tool in relation to the A mounting surface and Alternate mounting surface, is shown above. Page 13

39 Tape Scale, OPS Side Mount Configuration Installation By Mounted Applicator Tool 3. Mount the Applicator Tool. Mount the Applicator Tool in the Sensor mounting holes. Use the Z-height shim to set up the approximate Z-height, to ensure proper Applicator Tool function. 4. Note tape scale orientation with arrows and the D reference edge. The applicator tool is shown mounted to the OPS Sensor mount. Both Tape Scale arrows, and Applicator Tool orientation arrows need to point in the same direction for proper configuration. Also note, the D reference edge is determined from the OPS interface drawing. The tape scale orientation arrows always point to the D reference edge. In the example below, the dotted red line shown is the measured D reference edge. When the tape scale is finally installed, the orientation arrows will be pointing to the calculated D reference edge. In the example shown, the left side of the tape scale needs to go into the applicator tool entry channel first. Tool orientation arrows D Tape Scale orientation arrows Page 14

40 Tape Scale, OPS Side Mount Configuration Installation By Mounted Applicator Tool 5. Peel off a short section of bottom adhesive backing approximately 50mm (2 inches). PurePrecision Tape Scales have 3 layers, blue protective film, steel scale, and adhesive backing. Using a sharp tool or fingernail, initiate the peeling of the adhesive liner from the end of the tape scale that will be inserted into the applicator tool entry channel. NOTE: Do not peel the blue protective film off at this time. 6. Turn Applicator Tool to the Up position and insert tape into applicator tool. Rotate the knob that controls the contact cylinder plunger to the UP position. This allows you to insert the first section of adhesive exposed tape, into the applicator tool. Be sure that both the tape scale orientation arrows and the applicator tool arrows point in the same direction. Plunger in UP position Tool orientation arrows Tape Scale orientation arrows Adhesive backing liner Close-up of plunger knob in the UP position. The position of the keyways indicates UP or Down. Rotating the knob will both move the plunger up or down. Page 15

41 Tape Scale, OPS Side Mount Configuration Installation By Mounted Applicator Tool 7. Insert a short section of tape scale into the tool, approximately 50mm (2 inches). Insert the first short section of tape scale so that it emerges just past the plunger knob to a desired end location. Press down on this exposed 3-5mm section of tape. Press down on this small section of tape Plunger in the UP position 8. Rotate the pressure plunger knob to the Down position. Rotate the plunger knob so that the key-way notch is in the position shown. Plunger knob in the DOWN position Close-up of plunger knob in the DOWN position. Position of notch indicates that the plunger is in the DOWN position. Page 16

42 Tape Scale, OPS Side Mount Configuration Installation By Mounted Applicator Tool 9. Move the tool in a steady motion to apply the tape scale. Push the applicator tool in the direction of tape application. Be sure to pull the adhesive backer out of the way while the applicator is in motion. Direction of motion of tape applicator tool. Pull adhesive backer away from tape applicator, while moving the applicator tool. 10. Once the scale is applied to the mounting surface, and before the blue protective film is removed, it is recommended that even pressure be applied over the entire tape scale length by sliding a glove or cot protected finger across the scale. The applied pressure will ensure that the adhesive is evenly and permanently set. Page 17

43 Tape Scale, OPS Side Mount Configuration Installation By Mounted Applicator Tool 11. Peel off the blue protective film. Start the peeling process using a sharp tool, being careful not to damage the scale. Pull off the remaining blue protective film. Clean the tape scale using alcohol or acetone and a lint-free cotton cloth. NOTE: Make sure you have on finger cots or talc-free gloves. NOTE: After removing the blue protective film, the scale is ready for use and will perform to specification. The encoder will not function properly with the blue protective film installed. It must be removed for proper encoder operation. NOTE: If installing index/limits (Laser Tape II and PVGL glass), go to the Stick-On Index and Limit Marker Installation section. Page 18

44 Tape Scale, OPS Top Mount Configuration Installation by Hand Grip Applicator Tool NOTE: For best system performance, talc-free gloves or finger cots should be worn during all steps of tape scale installation. Thoroughly clean the scale mounting surface and reference edge using a cotton swab or lint-free cloth dampened with isopropyl alcohol or acetone. Remove all dust and particles. 1. OPS Top Mounted Tape Scale Applicator Tool (Model Number: TSAT-PPT) The Hand Grip Applicator Tool is needed for tape scale lengths greater than 300mm. It is designed to be hand held and to slide along either a permanent or temporary mounting edge while tape scale is applied. Tape scale entry channel Reference arrows for Tool and tape scale orientation Adhesive backing channel Adhesive backing exit 2. Hand Grip Applicator Tool mounting surface guide edges. The had grip applicator tool has two guide edges. One is for low guide edge configurations of thickness 0.76mm (0.030 inches) and one for higher guide edge configurations of thickness greater than 9.5mm (.375 inches). Refer to the OPS interface drawing for tape scale reference edge D Low guide edge Low guide edge D Low guide edge of tool. Mounting surface edge of thickness 0.76mm (0.030 inches) Note: The low guide edge also corresponds to the D tape scale reference edge in the interface drawing. Page 19

45 Tape Scale, OPS Top Mount Configuration Installation by Hand Grip Applicator Tool 2. Hand Grip Applicator Tool mounting surface guide edges (continued) Higher guide edge surface Temporary straight edge D Higher guide surface of tool. Mounting surface reference edge is higher than 9.5mm (0.375 inches) 4.18 ± 0.05mm Guide surface 3. Orienting the Hand Grip Applicator Tool and PurePrecision II Tape Scale Both Tape Scale arrows, and Applicator Tool orientation arrows need to point in the same direction for proper orientation. Also note, the D reference edge in the OPS interface drawing. The tape scale orientation arrows always point to the D reference edge. In the example below, the D reference edge is shown, with tape scale orientation arrows pointing to it. The applicator tool orientation arrows are also pointing in the same direction. In the example shown below, the left side of the tape scale will need to go into the applicator tool entry channel first. This tape scale end is referred to as the correct end. Applicator Tool orientation arrows Tape Scale orientation arrows on blue protective film Left side of tape scale D D = Tape Scale Mounting Surface Reference Edge (See the OPS interface drawings) Page 20

46 Tape Scale, OPS Top Mount Configuration Installation by Hand Grip Applicator Tool 4. Preparing the tape scale for the applicator tool PurePrecision Tape Scales have 3 layers, blue protective film, steel scale, and adhesive backing. The top two layers fit under the dowel pin, while the bottom adhesive backing fits into the backing slot as shown below. Entry slot for tape scale with blue protective film (under dowel pin) Entry slot for adhesive backing Exit slot for adhesive backing Determine the correct end of the tape scale to insert into the applicator tool entry slot. The correct end is determined by the direction of the orientation arrows on both the tape scale blue protective film and the applicator tool arrows. Both sets of arrows have to point in the same direction. There are different methods to prepare and insert the tape scale and backing into the hand grip applicator tool slots. One method is shown below. From the correct end of the tape scale, peel and curl back 50-75mm (2-3 inches) of the adhesive liner as shown. Take care not to touch the adhesive on the bottom of the tape scale or allow any particle contamination. Correct tape scale end. All orientation arrows point in the same direction. NOTE: Do not peel the blue protective film off at this time. Peel and curl back 50-75mm (2-3 inches) of the adhesive liner Page 21

47 Tape Scale, OPS Top Mount Configuration Installation by Hand Grip Applicator Tool 5. Feed the adhesive backing into the applicator tool Insert the backing film into the applicator tool. 5.1 Adhesive backer inserted into backer slot. 5.2 Adhesive backer exiting from backer slot. 6. Tape Scale Insertion Insert the tape scale (with blue protective film) under the dowel pin, into the entry slot as shown. 6.1 Dowel pin and entry slot. 6.2 Tape inserted. Feed tape scale into the applicator tool, until the end of the tape is past the front roller as shown. 6.3 Tape inserted with adhesive backing exiting. 6.4 Tape scale fed past front tool roller. Page 22

48 Tape Scale, OPS Top Mount Configuration Installation by Hand Grip Applicator Tool 7. Applying tape scale with the hand grip applicator tool Once the applicator tool is configured with the adhesive backer exiting from the exit slot and steel tape extending past the front tool roller, the scale is ready to be installed on the mounting surface. Applicator tool correctly configured for installation. High guide edge face. Applicator tool pressed down and against high guide edge face. Applicator tool in motion against guide edge face. Slide tool along guide edge face with a slow even pressure motion until all of the tape is installed on the mounting surface. Be sure the adhesive backing film does not bunch up and jam inside the tool and exits freely from the exit slot. Page 23

49 Tape Scale, OPS Top Mount Configuration Installation by Hand Grip Applicator Tool 8. Once the scale is applied to the mounting surface, and before the blue protective film is removed, it is recommended that even pressure be applied over the entire tape scale length by sliding a glove or cot protected finger across the scale. The applied pressure will ensure that the adhesive is evenly and permanently set. 9. Peel off the blue protective film. Start the peeling process using a sharp tool, being careful not to damage the scale. Pull off the remaining blue protective film. Clean the tape scale using alcohol or acetone and a lint-free cotton cloth. NOTE: After removing the blue protective film, the scale is ready for use and will perform to specification. The encoder will not function properly with the blue protective film installed. It must be removed for proper encoder operation. NOTE: If installing index/limits (Laser Tape II and PVGL glass), go to the Stick-On Index and Limit Marker Installation section. Page 24

50 Linear Glass Scales, OPS Side and Top Mount Configurations Installation 1. Mounting Surface Preparation Inspect the mounting surface for any machining irregularities. MicroE Systems recommends a surface finish of better than 1.6 micrometers Ra and mounting surface flatness of inch/inch. 2. Benching the linear Scale MicroE Systems' linear glass scales should be permanently affixed to the mounting surface, using epoxy and the adhesive attached to the back of the scale. "Benching" the glass scale to the system means aligning the scale by means of benching pins. Refer to the OPS Interface Drawings for dimensions. The benching pins can be set up on either side of the glass scale, but are referenced to the D reference edge of the glass scale as shown in the Interface Drawing. Be sure to use the proper orientation for the D linear glass scale reference edge and the OPS Top Mount reference face B as shown in the OPS Interface Drawings. Two benching pins are recommended on either long side of the glass scale and one at either end. L 0.2L 0.6L 0.2L End Benching Pin (optional) Benching Pins MicroE Systems Glass Scale Benching Diagram Position the benching pins inward from either end of the scale. 20% of the overall scale length is the recommended location from the edge. Be sure the benching pins do not exceed the height of the linear glass scale to prevent mechanical interference with the sensor or sensor mount. Page 25

51 Linear Glass Scales, OPS Top Mount Configurations Installation 3. Mounting linear Glass Scales (with adhesive backing), Model Number PVGL-T Make sure that the mounting surface is dry and clean. Align the scale by placing the edges against the benching pins. Peel off the glass scale adhesive backing and press into place. Apply a hard epoxy, such as Tra-Con s Tra-Bond 2116, to the one end of the scale (at the end benching pin side, if an end benching pin is used). Using one end secured with hard epoxy, allows thermal expansion from the benched end of the scale. Allow the adhesives to fully cure. A cure time of 12 hours is required for the glass scale's pressure sensitive adhesive to achieve the best performance and reliability. End Benching Pin Hard epoxy at one corner, end benching pin end side only. Benching pins MicroE Systems Glass Scale with Adhesive Backing Page 26

52 Index and Limit Marker Installation Stick-On Markers for PurePrecision Laser Tape II (HPTS-) and Performance and Value Linear Glass (PVGL-). (Not applicable to PurePrecision Marker Tape II Scales) Stick-On Index and Limit Markers, Part Numbers Index Marker Strips, Model Number NRIMS Limit Marker Strips, Model Number NRLMS Index and Limit Marker Strip Packaging Index Strip: 8 Index Markers 4-Left 4-Right Limits Strip: 4-Left and 4-Right* *Limit markers have different reflectivity values for left and right markers. Page 27

53 Index and Limit Marker Installation Stick-On Markers for PurePrecision Laser Tape II (HPTS-) and Performance and Value Linear Glass (PVGL-). (Not applicable to PurePrecision Marker Tape II Scales) 1. Put on finger cots or gloves before starting the index and limit markers installation. NOTE: Before installing the Limit and Index Markers, make sure that the blue protective film from the PurePrecision Tape Scale has been removed. Begin by holding the Limit and Index Marker strip so that the blue protective film is on top and the reflective surface is at the bottom. Remove the marker from a perforated strip by gently twisting the strip in the area of the marker. The marker will pull away from the transparent adhesive liner. Holding only the handle section, slowly pull the index marker from the perforated sheet. This will expose the adhesive. Stick-on Index Handle section NOTE: Be sure to hold the Index or Limit Markers by the handle only. The adhesive on the handle section can be touched. However, be careful not to touch the adhesive on the areas of the markers that will be applied to the scale. Page 28

54 Index and Limit Marker Installation Stick-On Markers for PurePrecision Laser Tape II (HPTS-) and Performance and Value Linear Glass (PVGL-). (Not applicable to PurePrecision Marker Tape II Scales) NOTE: Be sure to remove the blue protective film from the top of the tape scales before applying stick-on index and limit markers. For benching edge requirements, refer to the Interface Drawings for OPS. The benching edge corresponds to the D reference edge in the interface drawings. 2. Attaching the Index Marker to the Scale USE FINGER COTS or Gloves Benching edge ( D reference edge) Place the top edge of the marker against the benching edge, holding it at a 45 degree angle as shown in the photo. This keeps the adhesive away from the scale, until the marker is the correct location, before being pressed into place. If the scale is installed with an offset from its reference edge, a temporary reference edge surface such as a small metal block must be used for the index and limit markers. When the marker is tight against the reference edge, press the marker onto the scale with your finger. Index Marker Page 29

55 Index and Limit Marker Installation Stick-On Markers for PurePrecision Laser Tape II (HPTS-) and Performance and Value Linear Glass (PVGL-). (Not applicable to PurePrecision Marker Tape II Scales) 3. Press your finger on the marker close to the edge of the handle. Then, with your other hand, pull up on the handle to detach it from the marker. The handle will break away from the marker. Carefully remove the blue protective film from the marker surface. NOTE: Use fingernails or plastic tweezers to remove the blue protective film, but do not use a hard metal object. Using a hard metal object might damage the grating on the PurePrecision Tape Scale. Peel blue protective film 4. Apply the left and right limit markers, if applicable. Repeat steps 1-3. Stick-on marker installed Page 30

56 End Cap Installation for Tape Scales Optional 1. Epoxy Setup Mix the two-part epoxy and place it in a syringe or on the end of a stick. Do not use a cotton swab to apply the epoxy. Put epoxy on the end of the scale. Make sure that the epoxy touches both the mounting surface and the scale across the width of the scale. Only apply epoxy at the ends of the tape scale. Do not get any epoxy on the tape scale in the measuring area. Perform Step 2, immediately while the epoxy is still in a liquid state. 2. Installing the End Caps on the Mounting Surface Remove the adhesive liner from end cap. Place the end cap on the top of the scale and epoxy so that the end of the scale is in the middle of the end cap. Press down lightly to ensure adhesion and let cure for 24 hours. Page 31