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Optical dimensions Lasercheck 6212C, Руководство по эксплуатации и техническим характеристикам, Страница: 11 / 59

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6212C Manual Version 15_22 Rev 07-19.docx

 

Page 5 of 53 

INTRODUCTION TO LASERCHECK 

Overview 

Lasercheck is designed to perform high speed, repeatable, non-contact measurements of surface roughness. A 
built in visible laser diode emits a laser beam from the bottom of the gage illuminating the surface beneath it. 
After striking the surface, the laser light is reflected and scattered back into the Lasercheck detection system. 
The overall intensity and distribution of the reflected and scattered light is measured, digitized by Lasercheck 
electronics, and then Ra roughness is calculated for the illuminated area. This Ra value and other measurement 
parameters are then available to be read from a serial connection on the electronics board. User software 
requests the measurement value from that serial connection via serial cabling to that connector. 
 
Lasercheck has been designed for a nominal height standoff from the measurement surface. Minor motions and 
vibrations within that tolerance range will have minimal effect on measurement results. The Lasercheck head is 
delivered with flat fixture footplate that sets the standoff when the head is set on a flat or cylindrical surface. 
For other shaped surfaces, a custom footplate or fixture may be required to set the correct alignment and / or 
standoff distance. Please see the section on LASERCHECK ALIGNMENT PRINCIPLES AND PROCEDURES. 
Lasercheck can be configured so that surfaces may be positioned below the gage allowing measurements with 
no contacting of the surface. 
 

Содержание Lasercheck 6212C

Страница 1: ...r 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 6212C Ma...

Страница 2: ...on 15 22 Rev 07 19 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 Diagnostics...

Страница 3: ...PECIFICATIONS 1 Other Features 1 SAFETY 2 Electrical 2 Laser 2 WARRANTY OVERVIEW 3 LIMITATION OF WARRANTY 3 Contact Optical Dimensions customer service for shipping instructions 3 MAINTENANCE 4 Cleani...

Страница 4: ...7 Setup and Alignment 18 Message Type 15 18 Sample Setup and Alignment Aid from Message Type 15 18 Performing Roughness Measurements 20 Message Type 02 20 Rough and Smooth Ra Value 20 Common Error Cod...

Страница 5: ...4 Set Head Close to Correct Position 34 Align Horizontally 34 Align Vertically 34 Verify Alignment 35 Appendix B Mounting Fixturing Lasercheck 36 Existing Mounting Holes on Lasercheck Sensor 37 Append...

Страница 6: ...ine Cmd 11 02 and 04 48 20 xx cr lf Set Query baud rate 48 21 cr lf Query Revision Number 48 22 xx vvv cr lf Set Query Configuration Values 49 Set Values 49 Query Values 49 23 xxxxx cr lf Set Query He...

Страница 7: ...1 0 m Repeatability 3 0 of measured value 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 Powe...

Страница 8: ...rformance or procedures other than 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 co...

Страница 9: ...by Buyer please refer to Maintenance section unauthorized modification or misuse operation outside the environmental specifications improper site preparation or site maintenance fire flood earth movem...

Страница 10: ...resistant 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 elec...

Страница 11: ...e then available to be read from a serial connection on the electronics board User software requests the measurement value from that serial connection via serial cabling to that connector Lasercheck h...

Страница 12: ...the following items with your system 1 Lasercheck measurement head 2 Standoff 0 100 plate typically attached to measurement head 3 Lasercheck control board 4 Wire harnesses bare at one end connector...

Страница 13: ...connecting cables using compatible Hirose DF3 6S 2C Housings with Hirose DF3 2428SCF Tin Plated Crimp Sockets J1 and J2 Communication Connections The control board has 2 communication connectors J1 5...

Страница 14: ...ass through to power other devices from the same power source J7 IO Input Output Connections The control board has an IO connector at location J7 The board can be configured to control measurements by...

Страница 15: ...nual is provided This software is installed on a separate computer To Install Lasercheck Software from Windows 1 Insert Lasercheck CD or USB memory stick into the appropriate drive 2 Click on the Star...

Страница 16: ...rates in a limited function with the 6212C system allowing initial testing It will be installed in C Program Files x86 Lasercheck 6212C Lasercheck Program folder Running the program will bring up the...

Страница 17: ...1 of 53 Select Setup Comm Port and the following dialog box will appear Select the appropriate comm port on your computer and select OK Review or Create Lasercheck Setup Files on computer Select Setup...

Страница 18: ...create new setup files and save them to this directory Perform Measurements When returned to the setup screen select Main This will return you to the main screen From there push the Perform Measureme...

Страница 19: ...nual stp file The following dialog box will appear If it is not the correct setup file select the Cancel push button This will return you to the Main Measurement Window where you can repeat the proced...

Страница 20: ...refer to included archive Lasercheck Windows Software Manual V1_6_1 Test measurements can be saved to C ProgramData Lasercheck 6212C Files Data directory for review in the Review Data module found in...

Страница 21: ...eck can be used with external inputs to start and stop the measurements in an automated installation Trigger input is Digital IN 1 or Pin 1 of connector J7 See the communications protocol section of t...

Страница 22: ...Either the surface will move under the gage or the gage will be moved over the surface In either case alignment must be maintained during relative motion An air knife can be used prior to the gage to...

Страница 23: ...iples and Procedures If parts are not clean an air knife should be installed and mounted prior to the laser head to blow dry excess coolant off of the surface to be measured Ideally the parts would pa...

Страница 24: ...This value is used as an aid in horizontal alignment The last values returned in this measurement set are the Max detector location and value For optimal vertical alignment this Max detector location...

Страница 25: ...mple Alignment Aid Graph Lasercheck Alignment Data 0 0 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 Detecto...

Страница 26: ...y should be ignored on surfaces known to be greater than approximately 15 microinches as the accuracy of these error messages declines as surfaces get rougher Max Detector The max detector is the same...

Страница 27: ...lues and still be well aligned operating and calculating correctly but 300 mV is minimal under most circumstances This value depends somewhat on roughness low voltage is an increasingly greater proble...

Страница 28: ...es The 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 lig...

Страница 29: ...faces 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...

Страница 30: ...plate 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 detec...

Страница 31: ...s misaligned 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...

Страница 32: ...ipped 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 sha...

Страница 33: ...shafts 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 perpendicula...

Страница 34: ...d either 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 fir...

Страница 35: ...of the 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 Th...

Страница 36: ...Type 15 to the Lasercheck board 2 Prepare Sample and Fixture Set the measurement head on the part or put the part on the fixture or measurement head 3 Perform Measurement Execute Message Type 15 The L...

Страница 37: ...cel spreadsheet Open Lasercheck Align Graph xls by clicking on the icon in the Start Menu under Start Programs Lasercheck Lasercheck Align Data This will start Microsoft Excel and open the graph If pr...

Страница 38: ...able but not quite perfect alignment If the large specular reading is on one of the red detectors Lasercheck will not perform accurately If the largest reading is below the green detector 6 on the gra...

Страница 39: ...ing is correct if the voltage seems reasonably high Always move the head back and forth to find and update a true maximum 100 value Notes to Using the Lasercheck Diagnostics Option for Alignment Verti...

Страница 40: ...our detectors on rough or non metallic surfaces Recommended Alignment Diagnostics Since alignment is critical to reliable Lasercheck measurements alignment aids built into user software are recommend...

Страница 41: ...han 20 microinches resolution of Lasercheck decreases and sensitivity to misalignment increases Mounting and alignment stability becomes more important to maintaining high repeatability from Laserchec...

Страница 42: ...nsor 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 surf...

Страница 43: ...al information 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 i...

Страница 44: ...pattern of scattered light is affected by the microscopic surface roughness pattern created by the machining operation used on the surface Two simple examples to illustrate surface pattern affecting...

Страница 45: ...irement for Calibration of Lasercheck to Specific Machining Operation The images below are basic optical schematics of Lasercheck showing laser source beam reflecting optics and layout of detectors In...

Страница 46: ...ration 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 cus...

Страница 47: ...portable unit J2 is for communication to a standard PC com port Communications for both will be at 57600 baud 8N1 The communication protocol is designed to be simple and is only printable characters...

Страница 48: ...f Detectors 1 37 02 dd cr lf Returns continuous 02 response Will continue making measurements until dd number of measurements have occurred dd 01 to 99 Response 02 00 1234 01 1234 ok dd 12 3456 cr lf...

Страница 49: ...um of all voltages from detectors 01 to 35 The value will be 7 characters in length including the decimal point character with padding zeros on either end when necessary and always followed by a comma...

Страница 50: ...roughness values will always be 7 characters in length including the decimal point character with padding zeros on either end when necessary and always followed by a comma Ra rough Ra smooth Error Co...

Страница 51: ...cr lf Location Sum of 3 max used to find specular 07 0 1234 cr lf Max Detector Loc Max Det Value within Sum of 3 max cr lf 05 Request Ra Value Returns Ra values when the start input pin is activated...

Страница 52: ...oo low sum_voltages for reliable Ra calculation less than 100 mVolts rr for rough range error Occurs if error in defining detectors in configuration file Note it is important to interpret the tc and t...

Страница 53: ...ow min roughness encountered between start and stop contact closes after stop received 10 cr lf Laser on Voltages used to request just laser on voltages Only for testing purposes Response 10 cr lf 0 1...

Страница 54: ...Detectors 1 37 Resp 04 00 1234 00 1234 cr lf Spec sums Rough Smooth used for Ra calculation 06 00 1234 cr lf Location Sum of 3 max used to find specular 07 0 1234 cr lf Max Detector Loc Max Det Value...

Страница 55: ...11 Last Detector in Smooth Specular Sum 2 Last Detector in Smooth Specular Sum 12 First Detector in Smooth Ra Calculation 3 First Detector in Smooth Ra Calculation 13 Last Detector in Smooth Ra Calcu...

Страница 56: ...s Note Factory Set Set command 26 b xxx xxV cr lf b is the Bank Number Range is 1 5 xxx xx is the resistor value Default is 1 0K V is the multiplier either K for kilohm or M for Megohm Values are in A...

Страница 57: ...and BP To 0 46 as in 6212Gd file 29 A1 11 90 cr lf 29 B1 14 81 cr lf 29 C1 0 00 cr lf 29 BP1 0 46 cr lf Query command 29 cr lf Query Response 29 cr lf aaaaaa cr lf FILENAME uncal 6212Gd 8826GRD bbbbbb...

Страница 58: ...6212C Manual Version 15_22 Rev 07 19 docx Page 52 of 53 Appendix E Wiring and Dimensions American and Metric Versions...

Страница 59: ...6212C Manual Version 15_22 Rev 07 19 docx Page 53 of 53...

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