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Summary of Contents for LTC Laser MicroMap LP-4210F
- Page 1 Laser MicroMap Inspection System Operating Procedure For LP-4210F Systems Revised 17 Dec 2010 6742 185 AVE. NE, SUITE 300 REDMOND WASHINGTON, USA 98052 425-885-0607 WWW.LASER-NDT.COM...
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Page 2: Table Of Contents
ABLE OF ONTENTS ..............................1 ABLE OF ONTENTS ................................3 ASER AFETY ................................4 NTRODUCTION Overview ................................4 System Configuration ............................4 LP-4210F™ Data Acquisition Instrument ......................5 Delivery System ..............................7 LaserViewer™ 2010 Software ..........................7 ................................8 YSTEM ETUP .............................. - Page 3 Saving Processed Data ............................28 Saving Text Files ..............................29 Saving Bitmaps ..............................29 Printing ................................29 USB K ............................30 OWER SSUE Resolution ................................30 ............................31 UICK EFERENCE HEET ..............................32 ROUBLESHOOTING Laser .................................. 32 Motors ................................32 Data ...................................
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Page 4: Laser Safety
If fingerprints or other contamination are on the laser or photodetector windows, make sure the system is off, then clean with an alcohol-based lens cleaner and a lens cloth/tissue. For any other maintenance or service questions, contact LTC. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. -
Page 5: Introduction
Introduction Overview This manual is intended to provide the reader an introduction to the basic theory and application of laser-based profilometry. It also includes specific instructions for the setup and operation of the Laser MicroMap™ laser profilometry system (LP system). The LP probe sensor employs the principle of optical triangulation using a 630 –... -
Page 6: Lp-4210F™ Data Acquisition Instrument
LP-4210F™ Data Acquisition Instrument The LP-4210F™ provides controls for all motion of the sensor, laser power control, analog signal processing, and data acquisition and analysis capabilities. Figure 1. LP-4210F™ Front Panel Front Panel Controls POWER – A red LED that indicates power ON/OFF. LASER –... - Page 7 Figure 2. LP-4210F™ Back Panel Rear Panel Controls MOTOR FUSE 2.5AMP – The MCU uses a 2.5A time delay fuse. MOTOR and SENSOR – The Linear Motor Cable and Sensor Cable attach to these connectors. EXT MONITOR – An external VGA monitor may be plugged into this connector. When using an external monitor, the image quality on the internal monitor may degrade significantly.
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Page 8: Delivery System
To open LaserViewer™ 2010, double-click on the LaserViewer™ 2010 icon on the desktop, or choose Programs, LTC, LaserViewer ™ 2010 from the Start Menu. LaserViewer™ 2010 will not operate if the software key is not attached to one of the USB ports on the LP-4210F™... -
Page 9: System Setup
System Setup Important All instruments in the system should be plugged into the same circuit to insure a common ground. Always confirm that the power is OFF to all instruments, including the Motor Controller Unit, before attaching or detaching cables. ... -
Page 10: System Settings
System Settings Open the System Settings window from the System Setup tab (Figure 3). Note: The default settings are recommended. The System Settings window is intended primarily for test purposes. Laser Power Figure 4. System Settings Automatic This is the default setting. In Automatic mode, the laser is under control of an embedded laser driver that is housed in the sensor module. -
Page 11: Opening And Saving Workspaces
Opening and Saving Workspaces LaserViewer™ Workspaces contain all of the setup information necessary to perform scans or analyze data. This system has been provided with one or more pre-configured Workspaces that have been tailored to your application. However, it may be convenient to save several different Workspaces, each with different pre-set scan and processing parameters, to facilitate acquiring and analyzing different types of scans (e.g. -
Page 12: Motor And Axis Control
Motor and Axis Control Driving Motors Click on the Forward or Reverse button on the System Setup tab. One click will produce slow motion, two clicks will produce faster motion, and three clicks will provide the fastest motion. Moving to a Specified Location 1. -
Page 13: System Calibration
System Calibration Initializing a Calibration Scan Note: Refer to the Addendum provided with this manual for calibration setup and scanning instructions specific to your system. 1. Insert the sensor into the cal fixture, and initialize the encoders as described in the Addendum. -
Page 14: If The Calibration Process Fails
If the Calibration Process Fails 1. Click the Adjust Cal correction button. (Figure 5) This will modify the calibration parameters and, in most cases, allow the system to properly calibrate. Figure 5. Adjust Calibration 2. Press Rescan to recalibrate the system. 3. -
Page 15: Calibration Troubleshooting
Calibration Troubleshooting Confirm that all three rings appear in the plot (Figure 6). If they do not, attempt to reset the home position by pressing Start Scan, and following the instructions. Verify that each of the three annotations is centered in its respective ring (Figure 6). If not, their positions can be adjusted in Advanced Parameters under Ring X Analysis Start. -
Page 16: Scanning Operation
Scanning Operation Note: Refer to the Addendum provided with this manual for scanning instructions specific to your system. Setting the Scan Parameters 1. Click the Scan tab. 2. Click the Scan Parameters button to set the desired inspection parameters. 3. Set the desired scan length and resolution. 4. -
Page 17: Initializing A Scan
Initializing a Scan Important: The Home position should be verified immediately prior to each scan to ensure positional accuracy. This procedure will reduce small axial position errors that can accumulate as the system is driven forward and reverse multiple times in one session. 1. -
Page 18: Viewing And Analyzing Data
Viewing and Analyzing Data There are three data plots that enable operators to view and analyze data: the Profile plot, the LVI plot, and the Cross Section plot. The Profile plot displays a color plot of the profile data. The LVI plot displays the LaserVideo™ Image (total detected light at each point) of the scan. The Cross Section plot displays cross-sectional slices of the profile data. -
Page 19: Color Plot Display
Color Plot Display The color plots in the Scan and Data tabs may be used to display live scan data and saved data, respectively. 3D Barrel image from LaserViewer3D™ The color plot displays a 2-dimensional image of the inside of the scanned object. The vertical axis is the axial position, while the horizontal axis is the angular position. -
Page 20: Color Palette
Color Palette The Palette Painting window has several palettes that may be painted. In addition, moving the cursor over the palette causes a histogram of the displayed data to appear above the palette. Figure 11. Color Palette 1. Double-click on the palette display to the left of the color plot to activate palette painting. 2. -
Page 21: Viewing In 1:1 Aspect Ratio
Viewing in 1:1 Aspect Ratio To set the data aspect ratio to 1:1 Click the 1:1 icon. Note: On the Data tab, if the scan axes do not have the same units (e.g. one is in mm or inches and the other is in degrees), clicking the 1:1 icon will have no effect. -
Page 22: Viewing Laservideo™ (Lvi) Data
Viewing LaserVideo™ (LVI) Data The LaserVideo™ image (LVI) data plot displays a map of the total reflected light signal over the surface of the part. This information is displayed in terms of volts. A common way to view these data is to set the Color Palette to Gray Scale and adjust the contrast to illustrate the differences in signal over the part surface. -
Page 23: Data Analysis
Data Analysis Applying Processors to a Scan Data File Processors are tools for analyzing data. They optimize viewing and analysis of information. The processors available vary, depending on the application. In order to process scan data, the scan data must first be saved and re-opened. Important: The five default processors enabled in Figure 12 must be enabled before opening data, or the data may not display until Execute is pressed. -
Page 24: Processors
Processors Not all processors may be available on all systems. The processors available depend on the particular application. Median Filters The Median Filter removes spurious data points and replaces them with the median of their nearest neighbors. A larger filter length will result in more data smoothing. Note: Entering large filter lengths may cause a significant delay in re-calculating the data for large files. - Page 25 Straighten Data This processor may be used on data sets that have a tilt measurement subset that was collected during scanning. On tube-measurement systems with non-rigid delivery systems, the sensor may rotate during scanning. Some of these sensors and workspaces are equipped with a tilt- measurement circuit, which provides real-time measurement of the sensor rotation during the scan.
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Page 26: Reading Data Values
Degree to Linear Conversion For rotary systems, there is an option to convert degrees to mm (or inches) on the rotary axis. This facilitates measuring feature dimensions and allows for viewing in a 1:1 aspect ratio. Reading Data Values 1. Place the cursor over any point in the color plot. The coordinates and data value for that point will appear above the color plot. -
Page 27: Viewing Cross Sectional Data
Viewing Cross Sectional Data The Cross Section tab displays a scaled two-dimensional cross-section of the scan data. The axial position and cursor angle of the data displayed in the Cross Section plot are shown to the left of the Cross Section plot. Important: The centering offset should be removed before viewing cross-sectional data. -
Page 28: Selecting The Reference Radius
Selecting the Reference Radius The reference radius is a circular annotation on the Cross Section plot. Because it is a true circle, it is useful as a reference. To select the position of the reference radius annotation either click and drag it to the desired position, or enter the desired value in the Reference Radius text box. -
Page 29: Printing And Saving Data
Printing and Saving Data Saving Processed Data The Save Processed Data function allows the user to save the final result of all of the processors that have been applied to the scan data. When saving processed data, only the processed subset is saved. -
Page 30: Saving Text Files
Saving Text Files In a text file, the data is saved as an array of data values. Each line contains the data for a single scan line. The first line in the file contains the lowest index axis position (most negative, if the index axis contains negative values). -
Page 31: Usb Key Power Issue
USB Key Power Issue There has been a rare and intermittent issue where Windows XP will suddenly fail to recognize the LaserViewer™ USB key. The symptoms include the light on the USB key turning off, and the inability to save files and workspaces. Resolution The easiest way to resolve this issue is to close LaserViewer™... -
Page 32: Quick Reference Sheet
Quick Reference Sheet 1. LASER MODE Settings A. CONTINUOUS (SmartLaser™ Off) is Lab Mode. Laser will always be on. This setting is not available on most workspaces. B. SMARTLASER™ is Laser SAFETY Mode. Laser will blink when not hitting a surface within its range. -
Page 33: Troubleshooting
Troubleshooting Laser Problem Solution(s) Laser does not illuminate Check LP-4210F™ power. Check all cable connections. Check to see if a target is in the measuring range of the sensor. If the laser is in AUTO mode and there is no target in front of the sensor the laser will remain in pulse mode. -
Page 34: Data
Data Problem Solution(s) Profile or LaserVideo™ Intensity strip Check LP-4210F™ power. chart does not update signal Check all cable connections. Differential signal oscillates widely when Check if laser is on. the target distance is not changing Sum signal is negative and/or oscillates ... -
Page 35: Software
Software Problem Solution(s) LaserViewer™ does not perform properly Close LaserViewer and re-open. Close LaserViewer™, re-open and load backup workspace. Cycle the power on the LP-4210F™ Data Acquisition Instrument. Workspaces will not open or display Put LaserViewer USB Key in a free “demo mode”...
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