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6212A Manual Version 14.56.docx

 

Page 53 of 58 

Lasercheck will measure different signals and calculate different roughness for these two surfaces with identical 
Ra. The surface roughness pattern (machining operation) and resulting scatter pattern therefore must be an 
integral part of any Lasercheck calibration. 

Base Calibration 

Lasercheck is shipped calibrated to traceable standards for measurement of directional ground and sanded 
surfaces. Lasercheck can be calibrated for other surface finishing processes using an Excel spreadsheet 
calibration tool provided to generate a machining / surface pattern specific calibration file. 

Overview of Calibration Process 

Calibration of the Lasercheck gage involves customer testing known surfaces with the Lasercheck. 

Lasercheck factory engineers use a custom excel spreadsheet tool to create a calibration file using those 
customer test values. Software in the Lasercheck instrument uses the new calibration file when it performs a 
measurement to provide users with roughness values calibrated to their finishing process. 

 

Graph of directional ground surfaces from Lasercheck Excel Calibration Tool  

Once a calibration is performed, Lasercheck never requires re-calibration for a specific surface finishing process; 
calibration never changes. 

Содержание LASER CHECK 6212A

Страница 1: ...Harbor Blvd 665 Costa Mesa CA 92626 Phone 831 287 0495 i n f o o p t i c a l d i m e n s i o n s c o m w w w o p t i c a l d i m e n s i o n s c o m LASER CHECK Surface Roughness Measurement Gages 621...

Страница 2: ...System Revision 14 56 Optical Dimensions and Optical D i m e n s i o n s are Registered Trademarks of Optical Dimensions The information in this document is provided as an aid in the Assembly Diagnost...

Страница 3: ...14 56 i Optical Dimensions i PERFORMANCE SPECIFICATIONS 1 Other Features 1 SAFETY 2 Electrical 2 Laser 2 WARRANTY OVERVIEW 3 LIMITATION OF WARRANTY 3 Contact Optical Dimensions customer service for sh...

Страница 4: ...LCD Push Buttons 11 Highlighting 11 If Controller Does Not Respond to Pushbuttons 12 Performing Manual Measurements 13 Choose a Setup File 13 Measure Window with Results 13 Saving a Measurement 13 Fil...

Страница 5: ...ows Software 19 Entering the Setup Module 19 Setup Options 20 Select the Communications Port 20 Select Automation Types 21 Setup for Lab System 21 Setup for Continuous Measurements Roll Grinding 21 Se...

Страница 6: ...35 How Does Lasercheck Work 35 Alignment 36 Vertical 36 Vertical Alignment Base plate 37 Horizontal 38 Cylindrical Surface Measurement Alignment Fixture 39 Bore ID Surface Measurement Alignment Fixtur...

Страница 7: ...Lasercheck 47 Existing Mounting Holes on Lasercheck Sensor 48 Appendix C Setup Files 49 Setup file format 49 RECEIVE_NAME 49 FILENAME 49 START_INPUT 49 MEAS 49 SERIAL 49 EXTERNAL1 49 RA_UNITS 49 RA_LI...

Страница 8: ...and Output Pinouts 54 Input 9 Pin Female D sub Connector 54 Internal Opto relay 54 Trigger pins 54 Power pins 54 Internal Opto relay Schematic 55 Typical Wiring Example 55 1 Using Unpowered Switches...

Страница 9: ...Spot size area measured 5 mm X 1 mm Environmental considerations temperature humidity Operating 10 C to 55 C 10 to 90 RH Storage 40 C to 80 C 1 to 99 RH Power requirements 110 220 VAC 50 60 Hz Other F...

Страница 10: ...those specified herein may result in hazardous radiation exposure The measurement sensor emits a red visible 650 nm laser beam pulsing at a 10 to 50 Hz Each pulse contains as much as 90 microjoules of...

Страница 11: ...yer please refer to Maintenance section unauthorized modification or misuse operation outside the environmental specifications improper site preparation or site maintenance fire flood earth movement o...

Страница 12: ...stant and can be subjected to moderate rain or splash without harm Boards and electronics used in the system are static sensitive and easily damaged by mishandling The Lasercheck housing and electroni...

Страница 13: ...long with statistical parameters Lasercheck has been designed for a nominal height standoff of 0 1 inch 0 01 inches from the measurement surface Motions and vibrations within that tolerance range are...

Страница 14: ...d find the following items with your system 1 Lasercheck measurement head 2 Standoff 0 100 plate typically attached to measurement head 3 Lasercheck control unit 4 110 Volt Power Device Cable 5 RS232...

Страница 15: ...d to an available serial port on your host computer Be sure that port has been set up as COM1 to COM4 in your computer Note During manual pushbutton measurement operation this computer connection is n...

Страница 16: ...Fixturing Lasercheck There are drilled and tapped holes on the Lasercheck sensor head that can be used for mounting and installing Lasercheck in an automated inspection application The head should be...

Страница 17: ...d on A CD or floppy disk with calibration setup files plus the manual is provided This software is installed on a separate computer An optional Windows file transfer software program is provided on a...

Страница 18: ...ler Main Screen When the main power switch is turned to the on position the internal electronics will turn on and software will begin executing During this startup period you will see will see the wor...

Страница 19: ...ghlighted in CAPITAL letters Options in that highlighted menu can be scrolled through are with a on the LCD screen To choose an option the Select button is pushed The option that appears in to the rig...

Страница 20: ...d to the front panel pushbuttons It takes about one second for the serial port to take control away from the pushbuttons when a serial based setup file is active In fact sometimes the controller may j...

Страница 21: ...ase see the section labeled SETUP FILES and the Appendix Calibration Procedures later in this manual This shows the GRIND_ST SET file as the active setup file Measure Window with Results Pushing the M...

Страница 22: ...repare the PC to receive the data Preparing Windows Software to receive files Start the Lasercheck File Transfer Software by clicking on icon in the Start Menu under Programs Lasercheck Lasercheck Fil...

Страница 23: ...d these data files end in txt Receive Command This selection transfers setup files from a PC via the serial null modem cable File Naming The Lasercheck installation software creates a directory with f...

Страница 24: ...r files on the computer The file extension will be set Click the Send button The Status indication in the windows software will indicate Finished Sending The control box will display Lasercheck File T...

Страница 25: ...roller Scroll to FILES Delete on the control box with the scroll push button and push the Select push button The LCD displays the following screen Scrolling to highlight Y and pushing the Select push...

Страница 26: ...ments and headers The data fields are separated from the header fields by tab characters so that SPC programs and spreadsheet programs like Excel can read the text files easily Sample Data File Filena...

Страница 27: ...asercheck control box is connected to the computer with the serial null modem cable For more detail on doing this refer to the Setting Up the Instrument section in the beginning of the manual Starting...

Страница 28: ...prior to creating setup files or performing measurements with the Lasercheck Windows program 1 Comm Port 2 Automation Type Select the Communications Port Select Setup Comm Port Select the communicati...

Страница 29: ...Setup for Lab System Check Lab System Then select OK Lab System Automation will cause Lasercheck to provide single measurements in response to input from the Windows software program or pushbutton on...

Страница 30: ...to its overall roughness and uniformity of roughness Set up for Individual Parts Parts Inspection Check Parts Inspection Then select OK Parts Inspection Automation will cause Lasercheck to provide sin...

Страница 31: ...6212A Manual Version 14 56 docx Page 23 of 58 Select the Open Controller Setup button A series of pre installed controller setup files will be presented...

Страница 32: ...ctory created by the installation program It is designed to calibrate the Lasercheck for specific processes and integrate the calibration in Lasercheck setup files Detailed instructions on how to perf...

Страница 33: ...ion 14 56 docx Page 25 of 58 Select and open the desired setup file This presents similar dialog box to creating a setup file with information that will transfer to the Lasercheck controller and defin...

Страница 34: ...never a measurement set is complete and ready for saving Automatic checkbox setting will cause Lasercheck software to automatically create a filename whenever a measurement set is complete and ready f...

Страница 35: ...kbox allows a separate ASCII file to be automatically created and specify what elements are contained in that ASCII file The ASCII file can then be imported into separate compatible programs including...

Страница 36: ...odule From the main window of the Lasercheck software select the Perform Measurements push button This invokes the setup open dialog box Select a setup file that contained the line START_INPUT MEAS An...

Страница 37: ...6212A Manual Version 14 56 docx Page 29 of 58 Select OK The main measurement screen will be presented...

Страница 38: ...58 Measure Menu Select the option Measure An empty graph screen with a run menu appears Note the following screen may appear If so try again and it should work It may be necessary to reboot software...

Страница 39: ...play is running the Stop menu selection can be used to stop the data acquisition Selecting Start will restart the display The Stop Start cycle can be repeated as many times as is necessary for the mea...

Страница 40: ...to work with external inputs in two modes for automated applications One is for continuous surface applications in which numerous measurements are taken between one start input and one stop input Thi...

Страница 41: ...d at a rate of approximately 10 per second between the Start and Stop activation Lasercheck Head Mounted on Conveyor for Automated Inspection Lasercheck Head Mounted over Multiple Individual Parts for...

Страница 42: ...as soon as the surface to be measured is leaving a position for the Lasercheck head to measure indicated by laser beam being fully positioned at the front edge of the measurement area of the part Both...

Страница 43: ...e distribution of reflected and scattered light from the surface is detected by a photodiode array with 35 small closely packed detectors This relative distribution of reflected and scattered light is...

Страница 44: ...at three different distances from the head The bottom surface the farthest from the head shows the specular reflection about to strike detector 2 This is misaligned the head is too far from the surfa...

Страница 45: ...e that is pre aligned to set correct vertical positioning on flat parts This base will set vertical position of the head so that the specular reflected laser beam will strike close to or on detector 6...

Страница 46: ...aligned the reflected and scattered laser light reflects to one side or the other of the center of the detector window This figure demonstrates horizontal misalignment because the laser beam and scatt...

Страница 47: ...with our optional model 6216 spring loaded alignment fixture This simple to use fixture when attached to the Lasercheck head will set horizontal position of the head perfectly on cylindrical shaped s...

Страница 48: ...s that have been honed to high surface quality Directional Rotational Many machined surfaces have a dominant direction of roughness The length of the Lasercheck head must be oriented perpendicular to...

Страница 49: ...her in the vertical or horizontal axis Fixturing must be designed to carefully and repeatably control positioning in both axes so that the specular reflected beam strikes in the middle of the first 11...

Страница 50: ...e laser beam that overfills the surface can be allowed to pass by It is important to ensure that part of the beam is not allowed to strike a secondary surface and reflect back into the sensors This wo...

Страница 51: ...st Screen A Measure Headtest Screen A shows a well aligned smoother surface A well defined specular beam is maintained as it bounces off the surface into Lasercheck It displays itself as the largest v...

Страница 52: ...e is at or make the rough surface look smooth to Lasercheck for just the alignment A reliable way to make a rough surface look smooth to Lasercheck is to wipe a thin film of oil on the surface This ma...

Страница 53: ...nd detectors Move the head back and forth COMPLETELY over a cylindrical surface This allows software to learn the optimal position You will see this value go up and down Position Lasercheck for maximu...

Страница 54: ...of SUM displayed on Measure Headtest software or by maximizing the horizontal alignment percent within Measure Align Align Vertically Vertical alignment works best on a smooth surface Move the head u...

Страница 55: ...should be positioned at a location where surface will be at the correct vertical and horizontal position relative to the gage sensor The Lasercheck sensor must be precision adjusted over the surface i...

Страница 56: ...formation for mounting of Lasercheck sensor over a cylindrical surface IMPORTANT the position of the measurement sensor relative to the surface is an approximate value All mounting designs must incorp...

Страница 57: ...ME This is the prefix of the filename to which the data is saved The prefix must be five characters that are used to create an incremental data file abcde will create files named abcde001 txt abcde002...

Страница 58: ...t will generate 10 Volts or 20 milliamps output at the pins Jumper Settings for Setting Analog Output to 4 20 mA or 0 10 V Jumpers JP2 and JP3 on top board inside of control box must be set to configu...

Страница 59: ...roughness the laser reflection will contain some diffuse reflection scatter in addition to the specular reflection The shape of the pattern of scattered light is affected by the microscopic surface r...

Страница 60: ...surface roughness increases the specular portion of reflection decreases in intensity and the scatter portion of reflection increases in intensity Lasercheck measures that entire pattern of specular...

Страница 61: ...ibration tool provided to generate a machining surface pattern specific calibration file Overview of Calibration Process Calibration of the Lasercheck gage involves customer testing known surfaces wit...

Страница 62: ...supply Connect to input triggers Power pins Pin 9 12 to 13 VDC from internal power supply Pin 7 Ground of internal power supply Use only for powering external triggering devices that require power su...

Страница 63: ...ct Power for Opto relays using Control Box Voltage Pin 9 b Connect Switches between Ground Pin 7 and Input Pin Input 2 Pin 8 Input 3 pin 4 Ground Pin 7 Input 1 Pin 3 Switch 3 Switch 2 Switch 1 Opto Su...

Страница 64: ...ing Control Box Voltage Pin 9 b Connect Triggering Devices between Ground Pin 7 and Input Pin Recommended Proximity Sensor Specifications DC NPN short to ground to activate shielded for most applicati...

Страница 65: ...t 0 10V 4 20mA 2 Not Used 3 Not Used 4 GND system ground 5 Ra_Limit Closed if Out of Spec 6 Analog_Out Ground 0 10V 4 20mA 7 Not Used 8 Not Used 9 Ra_Limit Closed if Out of Spec NOTE Jumpers JP2 and J...

Страница 66: ...g_Out a 0 10V b 4 20mA NOTE 9 to 24 Volt power must be connected in series with Current Monitor Must be External power source Pin 1 Pin 6 4 milliamp LOW_ANALOG 20 milliamp HIGH_ANALOG 9 to 24 Volt EXT...

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