Thermal effect compensation for UCC1 and UCC2
Contents
1. Installation and user s guide REN ISH AW D H 1000 5105 01 B i ion apply innovation Thermal effect compensation for UCC1 and UCC2 RENISHAW S RENISHAW S EXTENDED WARRANTY Now available for this product Contact your vendor www renishaw com ew 2006 2009 Renishaw plc All rights reserved This document may not be copied or reproduced in whole or in part or transferred to any other media or language by any means without the prior written permission of Renishaw The publication of material within this document does not imply freedom from the patent rights of Renishaw plc Disclaimer RENISHAW HAS MADE CONSIDERABLE EFFORTS TO ENSURE THE CONTENT OF THIS DOCUMENT IS CORRECT AT THE DATE OF PUBLICATION BUT MAKES NO WARRANTIES OR REPRESENTATIONS REGARDING THE CONTENT RENISHAW EXCLUDES LIABILITY HOWSOEVER ARISING FOR ANY INACCURACIES IN THIS DOCUMENT Trademarks RENISHAWO and the probe emblem used in the RENISHAW logo are registered trademarks of Renishaw plc in the UK and other countries apply innovation is a trademark of Renishaw plc All other brand names and product names used in this document are trade names service marks trademarks or registered trademarks of their respective owners Renishaw part no H 1000 5105 01 B Issued 02 2009 UCC1 UCC2 Thermal effect compensation TEC system Installation and user s guide CE 2 FCC FCC USA only Information to user2. 22 Sensorcommon Shell Screen 23 Sensor common System specification 13 2 2 2 Cable connections Each thermal effect compensation sensor will have two terminals that will be connected to the thermal effect compensation daughtercard in the UCC1 UCC2 At the UCC1 UCC2 all the cables from the different sensors should be brought together and wired into a 44 way high density D type socket connector supplied Lemo connector I Sensor l T I I Sensor RN l V L 1 5 1 common I j Workpiece Switch if v sensor input Sensor common Part attached switch optional 44 way D type socket use metal shell to mount A CAUTION Minimum recommended conductor CSA of sensor cables 0 14 mm Maximum recommended return path resistance of sensor cables lt 5 Q All cabling should be screened Care must be taken to secure all axis sensor cabling to the axis body to prevent it getting trapped during moves Workpiece sensor cabling must also be kept away from any moving sections of the CMM 2 2 3 Mating connector Manufacturers part number McMurdo HDB44ST 14 System specification 2 3 Axis sensor specification 2 3 1 General description Axis sensors are required to monitor and compensate for any temperature changes within the CMMs scale The axis sensor is housed in a potted ring terminal with a 3 7 mm hole which can be either screwed or glued in position using a thermally cond
3. Attached to the metal plate is a 44 way high density D type plug connector 2 1 2 Thermistor connections to daughtercard The 44 way high density D type plug connector on the daughtercard has the following connections Fason Smet O Sensors and switch common connection 0 V Cable screen ground Via connector shell NOTE Unused pins should be left open circuit inside the D type connector 12 System specification 2 2 Electrical integration 2 2 1 44 way D type plug connector 1 15 O O O O O O O O O O O O O O O 16 O O O O O O QO O O O O O O O O30 0oooooooooooooO00 31 44 This connector is designed to permit the connection of the sensors to the UCC1 UCC2 The connections for the 44 way D type connector are shown in the table below Jacking posts are fitted to the connector on the rear panel to secure the mating socket supplied FIENT osm 24 Sensorcommon 25 Sensorcommon 26 Sensor common 27 Sensor common 5 6 Sensore 28 Sensorcommon 6 7 Senor7 29 Sensorcommon 7 8 Sensors 30 Sensocommo 8 9 Senorg 31 Sensorcommon 9 11 Seno 32 Switch input 33 Sensor common 34 Sensorcommon 36 Sensorcommon 6 Sensorcommon 17 Sensorcommon i8 Sensorcommon 19 Sensorcommon 20 Sensorcommon 21 Sensorcommon
4. FCC section 15 105 This equipment has been tested and found to comply with the limits for a class A digital device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the installation manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case you will be required to correct the interference at your expense Information to user FCC section 15 21 The user is cautioned that any changes or modifications not expressly approved by Renishaw plc or authorised representative could void the user s authority to operate the equipment Special accessories FCC section 15 27 The user is also cautioned that any peripheral device installed with this equipment such as a computer must be connected with a high quality shielded cable to insure compliance with FCC limits EC declaration of conformity 3 EC DECLARATION OF CONFORMITY Renishaw plc declare that the product Name UCC TEC daughtercard Description Thermal effect compensation card Part no A 1333 0190 has been manufactured in conformity with the following standard BS EN 61326 1998 Electrical equipment for measurement control an
5. PPM C PPM F Applicable to Axis Description The value for the thermal expansion coefficient for the axis scale should be obtained from the CMM manufacturer CAUTION Extra care should be taken to enter the correct coefficients of expansion during installation Incorrect coefficients may cause unexpected machine movements CalibrationTemperature Default setting 20 Unit of measure C F Applicable to Axis Description This is the temperature that this axis was actually calibrated at not the nominal temperature The calibration must have been performed without any thermal effect compensation enabled GradientAlarmThreshold Default setting 1 Unit of measure C F Applicable to Axis Description Allows differences between individual sensor readings on the axis in question to be compared against each other For differences above the defined threshold an alarm is raised bit 7 of status byte 5 if enabled Refer to appendix for further information TemporalAlarmThreshold Default setting 0 1 Unit of measure C min F min Applicable to Axis Description Allows averaged sensor readings for the axis in question to be compared against previous readings For rates of change above the defined threshold an alarm is raised bit 7 of status byte 5 if enabled Refer to appendix for further information 24 Software integration e TemporalAlarmWindowFactor Default setting 0 1 Input range See
6. be performed even when enabled until this command is successfully called Command 473 Temperature Compensation General Configuration This command allows the user to define a number of general temperature compensation parameters Command 476 Temperature Compensation Read Current Configuration This command can be called at any time to determine the current configuration of the temperature compensation settings 3 2 Status monitoring commands Command 474 Temperature Compensation Alarm Enable This command allows the user to enable or disable the three different kinds of temperature compensation alarm see appendix Compensation is still possible without calling this command The temperature compensation alarms default to all off Command 475 Temperature Compensation Read Alarm Status This command should be called whenever a temperature compensation alarm is activated i e when bit 7 of status byte 5 is set It allows the user to determine further details about the alarm raised This includes its type axis or workpiece involved and which sensors caused the alarm when this can be attributed Multiple alarms can be indicated simultaneously Note that this command will continue to show alarms as active even after they have been disabled if the condition causing the alarm remains present 18 Software integration Command 477 Temperature Compensation Read Current Contribution This command can be called at any time to determin
7. note 1 page 25 Applicable to Axis Description See note 1 page 25 Refer to appendix for further information ThermalDriftReferencePoint Reserved for future system use 3 7 6 Workpiece ExpansionCoefficient Default setting 0 Unit of measure PPM C PPM F Applicable to Workpiece Description The value for the thermal expansion coefficient for the workpiece must match that of the workpiece material currently being measured A CAUTION Incorrect coefficients may cause unexpected machine movement GradientAlarmThreshold Default setting 1 Unit of measure C F Description Allows differences between individual sensor readings on the axis in question to be compared against each other For differences above the defined threshold an alarm is raised bit 7 of status byte 5 if enabled Refer to appendix for further information TemporalAlarmThreshold Default setting 0 1 Unit of measure C min F min Applicable to Workpiece Description Allows averaged sensor readings for the workpiece in question to be compared against previous readings For rates of change above the defined threshold an alarm is raised bit 7 of status byte 5 if enabled Refer to appendix for further information Software integration 25 e TemporalAlarmWindowFactor Default setting 0 1 Input range See note 1 below Unit of measure Refer to appendix Applicable to Workpiece Description See note 1 below Re
8. settings the two temperature readings taken four minutes apart must have a minimum separation of 0 4 C to trigger the threshold alarm Example 1 Event 1 in the diagram below shows a temporal change of 1 5 C in time period T and 0 C in time period T If time period T was used with the default system the temporal alarm would have been activated If time period T was used the temporal alarm would have not been activated even though the system did have a period of time when the temporal change was in excess of the specified Event 2 in the diagram below shows a temporal change of 1 5 C in time period T and 3 C in time period T If time period T or T was used with the default system the temporal alarm would have been activated Appendix 33 24 T T 23 22 E El ENTZI SA ee ea C eee ae eee 19 Event 1 Event 2 i a a 17 Time Example 2 The temporal alarm is required to detect when a sensor temperature has changed by greater than 4 C over a time period of 40 minutes therefore time period 40 minutes Set the TemporalAlarmThreshold 4 C 0 C min 40 minutes Therefore TemporalAlarmThreshold 0 1 C min Set the TemporalAlarmWindowFactor TemporalAlarmWindowFactor x 4 0 1 40 minutes Therefore TemporalAlarmWindowFactor 1 Renishaw plc New Mills Wotton under Edge Gloucestershire GL12 8JR United Kingdom T 44 0 1453 524
9. 524 F 44 0 1453 524901 E uk renishaw com www renishaw com For worldwide contact details please visit our main website at www renishaw com contact RENISHAW E apply innovation H 1000 5105 01
10. DIG CO ann a S secte nea sece Geneve stage adees pages au eeeaneslaateanaeeatine 24 3 7 7 GCharntnelOffsels iier reti east eben tae ete e vsus 25 3 7 8 Seriallnterface1 sssssesssssssseeseeeeennneenennnenehnnnnnennn nnne rsen nne n nns sss nnn essa 26 Contents System accuracy and calibration eene nennen nennen nnne enne nnne 27 ecu 28 5 1 Using the thermal effect compensation TEC system sssssseseeee 28 5 2 Best practise for using the thermal compensation system ssssseeeeee 29 5 2 1 el hCICI M ED 29 5 2 2 WOFKDIOCO SONS OM set vases cnziivagete UP 29 5 2 3 MEI me 29 PADDING eee E Lr 30 6 1 Explanation of range alarm ssssssssseeeenenennneeen nennen nennen enn nnne enn 30 6 2 Explanation of gradient alarm sssessseseeeeeneenneeennn nennen nennen 31 6 3 Explanation of temporal alarm sse nennen nennen 32 Thermal effect compensation system 9 1 Thermal effect compensation TEC system Thermal effect compensation 2 daughtercard n J Y ET UCC1 UCC2 controller Workpiece sensor X axis Y axis Z axis Axis sensors The thermal effect compensation daughtercard is one of the range of plug in daughtercards for the Renishaw UCC1 and UCC2 universal CMM controllers This daughtercard will permit
11. d A1 1998 A2 2001 laboratory use EMC requirements Immunity to annex A industrial locations Emissions to class A non domestic limits and that it complies with the requirements of the following directive as amended 89 336 EEC Electromagnetic compatibility EMC The above information is summarised from the full EC Declaration of Conformity A copy is available from Renishaw on request 4 Care of equipment Care of equipment Renishaw probes and associated systems are precision tools used for obtaining precise measurements and must therefore be treated with care Changes to Renishaw products Renishaw reserves the right to improve change or modify its hardware or software without incurring any obligations to make changes to Renishaw equipment previously sold Warranty Renishaw plc warrants its equipment for a limited period as set out in our Standard Terms and Conditions of Sale provided that it is installed exactly as defined in associated Renishaw documentation Prior consent must be obtained from Renishaw if non Renishaw equipment e g interfaces and or cabling is to be used or substituted Failure to comply with this will invalidate the Renishaw warranty Claims under warranty must be made from authorised service centres only which may be advised by the supplier or distributor References and associated documents References and associated documents It is recommended that in addition to this document the follow
12. e the current contribution in mm or inches that the temperature compensation corrections are making to each of the machine axis readings It also reports the current average temperature that is being used for the axis or workpiece in question in order to make the calculation 3 3 Averaging Command 478 Temperature Compensation Sensor Averaging This command allows the user to enable and disable averaging of the temperatures read from the active temperature channels over a user definable period in order to reduce the effect of noise on temperature compensation If enabled averaging will also be applied to temperatures read directly from the TEC card using the latch and read temperature commands 437 and 438 3 4 Calibration offsets Command 479 Temperature Compensation Channel Offsets This command allows a user definable offset to be added to the temperatures read from the active temperature channels in order to allow fine tuning of the system calibration If defined the offsets will also be applied to temperatures read directly from the TEC card using the latch and read temperature commands 437 and 438 The default offset for each channel is 0 0 C 0 0 F See section 3 5 for further details 3 5 Discrete temperature reading commands NOTE Discrete temperature readings taken using these commands will also have averaging and offsets applied as described in sections 3 3 and 3 4 above Command 437 Temperature sensor interface latch t
13. ed alarms to warn the user of the following if the temperature exceeds the expected range if the temperature measured of one sensor on any axis is significantly greater than the other sensors on that axis if the temperature changes too quickly across any axis or workpiece Averaging can be applied to the temperature reading to smooth the data recommended The user can enter offsets for a more accurate CMM calibration The TEC system takes an average reading of the sensors on each axis workpiece Operation 29 5 2 Best practise for using the thermal compensation system 5 2 1 General After installation a system calibration as described in section 4 should be conducted Renishaw recommend that this calibration procedure is repeated every 12 months Ensure the CMM is not subjected to unnecessary changes in temperature for example fans blowing close to radiator in direct sunlight or any other powerful radiant sources Excessive humidity should also be avoided Use the system as close as possible to the calibrated temperature Renishaw recommends that workpiece sensors axis sensors and part attached switches are verified at six month intervals following the procedure detailed in section 2 5 5 2 2 Workpiece sensor Ensure the workpiece sensor is in full contact with the workpiece If possible position the workpiece sensor in the middle of the workpiece or near where the measurement is taking place E
14. efers to the type of sensors being used In addition to the Renishaw sensors it is posisble to use alternative sensors with the UCC1 UCC2 via the RS232 channel 3 port on the RS232 daughter card 3 7 4 ChannelAssignment This section assigns the location of the temperature sensors mounted on the CMM in software CAUTION Each of the 24 hardware channels available on the temperature card must be assigned a valid location These locations are then used to obtain the temperatures required for thermal effect compensation All channels default to NOTHING Possible assigned locations are NOTHING The thermal effect compensation daughtercard does not have a temperature sensor attached or can be used to disable the channel XSCALE The reading from this sensor will be included in the X axis mean temperature calculation YSCALE The reading from this sensor will be included in the Y axis mean temperature calculation ZSCALE The reading from this sensor will be included in the Z axis mean temperature calculation DUALSCALE The reading from this sensor will be included in the dual scale axis mean temperature calculation WORKPIECE The thermal effect sensor will be included in the workpiece mean temperature calculation Software integration 23 3 7 5 X Y Z Dual Axis This section assigns the configuration for the respective axis thermal effect compensation ExpansionCoefficient Default setting 0 Unit of measure
15. emperature Command 438 Temperature sensor interface read data and status These commands start the temperature reading process as follows 1 The host computer issues a temperature sensor interface latch temperature command 437 specifying the temperature channel to be read 2 The controller sets status byte 5 bit 2 the TSI TEC response ready for host to read flag to O 3 The controller and TSI TEC board read the specified sensor and calculate the temperature 4 The controller sets status byte 5 bit 2 the TSI TEC response ready for host to read flag to 1 5 The host detects this flag when using a Read Position and Status command 276 etc 6 Atsome time the host will issue a Temp Sensor I F Read Data and Status command 438 7 The controller will reply with the data and status for the temperature channel specified in step 1 above Software integration 19 3 6 Firmware version check Command 439 Temperature sensor interface read version This command will allow the host computer to read the release number of the firmware installed in the temperature sensor interface daughtercard 3 7 Definition of entries in the thermal effect compensation TEC file To enable the UCC1 UCC2 thermal effect compensation system it is necessary to configure the related system default parameters to those appropriate to the installation The system configuration parameter locations are listed below 3 7 1 Machine ini file confi
16. etween switch input pin 32 of the 44 way D type socket and any common ground The resistance value should be less than 20 Q when the switch is in the ON position and more than 1 MQ in the OFF position Software integration 17 3 Software integration Software integration details are specified in the UCC command set document Renishaw part number H 1000 5222 Please refer to the thermal effect compensation section of this document for full integration details However the following is an introduction to the commands required NOTE Current software does not take thermal bending in to account 3 1 Set up commands Command 471 Temperature Compensation Machine Configuration This command allows the user to define the temperature compensation or thermal effect compensation configuration for each of the machine axes It will need to be called once for every machine axis including the dual axis if appropriate Some of the values required such as calibration temperature should have been recorded when the machine was commissioned or last calibrated Machine axis temperature compensation will not be performed even when enabled until this command is successfully called for the axes in question Command 472 Temperature Compensation Workpiece Configuration This command allows the user to define the temperature compensation or thermal effect compensation configuration for the workpiece Workpiece temperature compensation will not
17. fer to appendix for further information NOTE 1 This parameter is used to help calculate the rolling window of time over which the temporal alarm conditions are analysed It should be set approximately to the uncertainty expected in the temperature measurement system in C F due to effects such as noise and resolution limitations This is necessary to average out insignificant temperature changes and prevent false triggers of the alarms The formula below shows how this factor is used in the software to calculate the time window used for the temporal alarm analysis Window minutes TemporalAlarmWindowFactor x 4 TemporalAlarmThreshold The default TemporalAlarmThreshold 0 1 C minute equivalent to 6 C hour and the default TemporalAlarmWindowFactor 0 1 would give a window of 4 minutes Any high frequency noise on the system over this period would not trigger the alarm However an average change in temperature of 0 1 C minute e g 0 4 C over the 4 minute period would trigger the alarm at the end of the window period thermalDriftReferenceX Reserved for future system use thermalDriftReferenceY Reserved for future system use thermalDriftReferenceZ Reserved for future system use 3 7 7 ChannelOffsets Default setting 0 0 Input range 10 0 Unit of measure C F Description The channel offsets section allows fine tuning of all the temperature sensors connected to the system permitting cal
18. guration Located within the ErrorCorrections section of the machine ini file are two variables that must be configured for the TEC system to operate these are listed below MachineThermalEffectCompensationFilePath Default setting The default location for this file is located within the machine subdirectory containing the machine ini file Input range Valid file path Description This must be the full file path to the machine thermal effect compensation file tec EnableThermalEffectCompensation Default setting 0 Input range 0 Thermal effect compensation system off 1 Thermal effect compensation system on Description To activate the thermal effect compensation system 3 7 2 MachineThermalCompTemplate tec A template for the tec file can be found within the machine default subdirectory This file should be copied into a specific machine folder and renamed appropriately during installation This file contains all the start up settings for the thermal effect compensation system CAUTION It is the installers responsibility that this file is modified to the appropriate settings for the installation failure to do this can result in metrology performance being corrupted 20 Software integration 3 7 8 SystemConfiguration section SensorReadingPeriod Default setting 10 Input range 1 to 255 Unit of measure Seconds Applicable to Active sensors Description Specifies the frequency of data reads from the active
19. iation between any two sensors exceed this the gradient alarm will be activated The graph below shows an example of gradient alarm functions 24 ae Gradient alarm 22 would be triggered Am at this reading MAN Ok 21 x fa AN e A B a hd C 20 17 16 Time e Sensor 1 B Sensor 2 Sensor 3 The gradient alarm range can be configured individually for any axis or any workpiece The gradient alarm default is set to off 32 Appendix 6 3 Explanation of temporal alarm The following section gives examples of how the temporal alarm system operates within the UCC1 UCC2 thermal effect compensation system The temporal alarm works on two readings separated by the time period not a calculated increase in temperature over time Time period The time period that the system operates within is calculated using the following formula Time period minutes TemporalAlarmWindowFactor x 4 TemporalAlarmThreshold Using the system default settings TemporalAlarmThreshold 0 1 TemporalAlarmWindowFactor 0 1 the time period will be 4 minutes 01x4 0 1 The system will take one reading and then a second reading four minutes after that Temperature threshold The threshold for the alarm is calculated using the following formula TemperatureThreshold TemperatureAlarmThreshold x TimePeriod Using the system default settings the TemperatureThreshold will be 0 4 C 0 1x4 Therefore using the default
20. ibration for each sensor to a common temperature 26 Software integration 3 7 8 Seriallnterface1 Seriallnterface1 allows use of the Renishaw TEC system by using 3rd party sensors with UCC1 UCC2 These sensors can be connected to the UCC via the RS232 channel 3 port on the RS232 daughter card Raw temperature data can be passed to the UCC where the compensation takes place NOTE If the serial interface is being used as an input for the 3rd party sensors then it is important that a TEC daughtercard is NOT fitted The operating software recognises the presence of a TEC daughtercard and if one is fitted it will only accept temperature compensation inputs from that source System accuracy and calibration 27 4 System accuracy and calibration The TEC system can be used without calibration However the system performance can be improved by calibrating each of the sensors used To compensate each channel individually an offset may be entered in the TEC file Without calibration the system accuracy is 0 2 C Calibrating the system will enhance this It is recommended that the calibration process is coherent with the expected machine or workpiece temperature variation For example if the machine is used in a room at 20 C 2 C with an acclimatised workpiece the calibration could be a single temperature measurement per sensor Calibrating the thermal effect compensation axis sensor can be avoided if the axis temperature is recorded d
21. ing documentation is referenced when installing the TEC system Renishaw documents Documentation available from www renishaw com Document number Title H 1000 5056 UCC installation guide H 1000 5223 UCC2 installation guide H 1000 5057 UCC programmers guide H 1000 5058 Renicis user s guide H 1000 5222 UCC command set H 1000 5224 UCCassist installation guide H 1000 5220 Daughtercard installation guide External documents Document number Title CFR 47 Part 15 1992 FCC Telecommunications Radio Frequency Devices BS EN 292 1 Safety of Machinery BS EN 50081 2 Requirements as to Emission of Electromagnetic Disturbances in an Industrial Environment BS EN 60204 Part 1 1993 General Essential Safety Requirements for Machines Low Voltage Directive BS EN 61010 1 1993 General Requirements for Electrical Equipment 6 Safety Safety Electrical requirements The UCC is powered from the a c mains supply via an IEC C14 connector Please refer to the UCC1 or UCC2 installation guide H 1000 5056 or H 1000 5223 for safety instructions and documentation relevant to the use of the UCC1 or UCC2 CMM controllers and their subsystems Environmental requirements The thermal effect compensation daughtercard when installed in a UCC1 UCC2 system complies with or exceeds the following environmental conditions BS EN 61010 1 1993 IP30 no protection against water Amwe Utzom OOS Relative humidity 80 maximum non conde
22. ion RangeAlarmEnable Default setting 0 off Input range 0 off 1 2 on Applicable to Active axis sensors Description This parameter configures the UCC1 UCC2 temperature system range alarm Refer to appendix for further information AveragingPeriod Default setting 10 Input range 1 to 255 Unit of measure Seconds Applicable to Sensor readings Description This is the time period over which the system averages each temperature reading from each connected sensor When AveragingEnabled is set to 1 this period can be specified up to a maximum of 255 seconds in steps of 1 second This value will be rounded to the nearest second if necessary A setting of 0 is equivalent to disabling averaging AveragingEnable Default setting 1 Input range 0 2 off 1 20n Applicable to Sensor readings Description This allows enabling and disabling of the averaging of the temperature data read from the active channels If enabled averaging will also be applied to temperatures read directly from the TEC card using the latch and read temperature commands 437 and 438 NOTE Averaging is recommended whilst using the system to prevent discrete corrections during temperature compensation 22 Software integration SensorEquipmentType Default setting 1 Input range 0 No system detected 1 Renishaw TEC system present 2 Serial interface 1 see section 3 7 8 Description The SensorEquipmentType r
23. lectrically ground workpiece prior to using the thermal effect compensation system to avoid electrostatic discharge ESD through the workpiece sensor Use multiple sensors for large workpieces Hold the workpiece sensor by touching its white sleeve If this is not possible wait for four minutes once the sensor is in position before proceeding to take a measurement Wait a minimum two minutes before measuring once the workpiece sensor is positioned It is recommended to wait a minimum of three minutes before measuring if there is more than a three degree difference between the current sensor temperature and the workpiece temperature If the optional part attached switch is installed then the user can activate workpiece thermal effect compensation using the switch NOTE It is not recommended to run axis thermal compensation without workpiece compensation where axes and workpiece are at the same temperature as this will provide worse results than not using compensation at all Keep the workpiece sensor cabling away from moving sections of the CMM 5 2 3 Axis sensors Ensure the sensors are mounted as close as possible to the axis scales It is recommended to have at least three sensors per axis to account for temperature gradient effects On large or high specification CMMs use more than three sensors per axis Thermally conductive glue should be used when gluing axis sensors to an axis All axis sensor cabling must be tightly
24. nsing for temperatures up to 31 C Linear decrease to 50 at 40 C Transient overvoltages Installation category Il Sensor working range 0 C to 70 C Contents 7 Contents 1 Thermal effect compensation TEC system ssssssssssssssseseeeeneeeeeee nennen nennen enn 9 US I unes usu 10 2 System hardware specification esssessessssesseeseseseeneen nennen nennen rennen ennt nnne 11 2 1 Thermal effect compensation TEC daughtercard specification essssssssss 11 2 1 1 General GESCHIPTION srice ae bade cay teed Eii 11 2 1 2 Thermistor connections to daughtercard cccceeeeeeseeeeeeeeeneeeeeeeeeeeeeeeeeneeeeeeeeaaes 11 2 2 Electrical integration ioa ei tte ee levine padece derum ge du tuu Yin nus 12 2 2 1 44 way D type plug connector ssseeseeeneeneneneeenn nme enne 12 2 2 2 Cable connections 1s caccsekvecasinetetay exvecenaihaneee oaa a a a n eaa a edana 13 2 2 3 Mating Connec scs a a 13 29 AXIS SCNSOMSPOCIICAU OM per ENS 14 2 3 1 General GESCriptlOn e RE 14 2 3 2 Bent EEUU 14 2 3 3 Mating COMMOCIONS CM 14 2 4 Workpiece sensor SpecitiCatiOn uacoe e oes mere pde etate uve eate ce ovv ugiat ene Cut Red u ou un 15 2 4 1 General desctiptior icit edere merece tr Et debet S 15 2 4 2 Bier 15 2 4 8 MatING I CONMOCIONS 2 ERR ETE wees thee veereinmes tSecaeutee shes a 15 2 4 4 Pat attached SWIECI iiio cout peut tet exer datu S 16 25 Se
25. nsorresistahce CHECKS uestes per tont eee nue iae heu pu adr ete pou Fuge Ru uerus ere na 16 2 5 1 Resistance check procOdUlG sisese masrana tenen 16 2 5 2 Part attached Switch check tete rene Doer S 16 3 Software integration sssssssssseseseseseseseeenen nennen aaar ataei aaa DEEE d AESSR senten inerenti 17 3 4 Set up commandqs sssssssssssessssesesesee eene nennen ren aaee ea nnn seines es a P EANNA ETEA aa ESE 17 3 2 Status monitoring commands ssssssssssseeeeeeee nennen nnne nennen nnne nnne nnne 17 B35 GAVETAGIING xcs MES 18 3 4 Calibration offsets 00 0 ccccccccccsssssseeeeeeeeceeecceseeeesseeeeeeeeeeeccseseseessseaeeeeeeeeseceseseessaasaneeeeeess 18 3 5 Discrete temperature reading commands sssssssseeeeeeeeeeem meer 18 3 6 Firmware version check ssessssssesesseseeeeeeeennnnne nnn nnnnne nnn n nennen nannten nennen entren nnn 19 3 7 Definition of entries in the thermal effect compensation TEC file ssssssssss 19 3 7 1 Machine ini file CorfigUratiori 2 circio cte idco rt Ek au esse eek Rana E YE UR 19 3 7 2 MachineThermalCompTemplate tec sss nennen 19 3 7 3 SystemContfiguration section auci secet coser ea Fern vn ede a Lu 20 3 7 4 ChannelAssignment sessssssssssssseeeeeeeeneee nennen nnne nnns enne nnne 22 3 7 5 XIN IZIDA PAKIS caossu 23 3 7 6 WOOR
26. secured to the axis body to prevent it getting trapped during moves 30 Appendix 6 Appendix NOTE These explanations all assume that the UCC1 UCC2 system is set to mm C 6 1 Explanation of range alarm Shown below is a graphical representation of how the range alarm operates within the UCC1 UCC2 thermal effect compensation system The range alarm operates on all axis sensors one sensor exceeding the specified range will cause the range alarm to be activated The graph below shows an example of range alarm functions NOTE The range alarm is not applied to workpiece sensors 29 cca Upper range alarm would be A n D te 21 o o XE 18 ie Lower range alarm would be 17 Reda GS at this reading Range alarm upper threshold g Range alarm lower threshold Temperature The default setting for the lower threshold is 16 C The default setting for the upper threshold is 28 C The range alarm default is set to off Appendix 31 6 2 Explanation of gradient alarm Shown below is a graphical representation of how the gradient alarm system operates within the UCC1 UCC2 thermal effect compensation system The gradient alarm has one threshold per axis The example below shows three sensors as could be fitted to a machine axis and a GradientAlarmThreshold of 1 The GradientAlarmThreshold means that these three thermal effect compensation sensors can have a maximum temperature variation of 1 degree if the var
27. sensors for the purpose of thermal effect compensation ThermalReference Default setting 20 Unit of measure C F Applicable to All compensation calculations Description All thermal effect compensation corrections are made with respect to this temperature RangeAlarmLowerThreshold Default setting 16 Unit of measure C F Applicable to Active axis sensors Description This is the lower range threshold If the alarm is enabled when the temperature falls below this temperature the range alarm will be activated bit 7 of status byte 5 Refer to appendix for further information RangeAlarmUpperThreshold Default setting 28 Unit of measure C F Applicable to Active axis sensors Description This is the upper range threshold If the alarm is enabled when the temperature rises above this temperature the range alarm will be activated bit 7 of status byte 5 Refer to appendix for further information GradientAlarmEnable Default setting 0 off Input range 0 off 1 on Applicable to Active sensors Description This parameter configures the UCC1 UCC2 temperature system gradient alarm Refer to appendix for further information Software integration 21 e TemporalAlarmEnable Default setting 0 off Input range 0 off 1 2 on Applicable to Active sensors Description This parameter configures the UCC1 UCC2 temperature system temporal alarm Refer to appendix for further informat
28. thermal effect compensation of the part being inspected and the CMM axes Up to 24 temperatures can be monitored and the information used to compensate for measurement errors introduced by thermal effects These temperatures are measured using sensors which can be fixed to the X Y and Z axes of the CMM and to the workpiece being measured The daughtercard is designed for use with Betatherm NTC 10K3A1 thermistors or equivalent with an accuracy of 0 1 C CAUTION Other types of sensor should not be integrated into the system as the daughtercard hardware and software are not optimised for such devices metrology may be adversely affected 10 Thermal effect compensation system 1 1 System components The components of the UCC1 and UCC2 thermal effect compensation systems are Thermal effect compensation daughtercard with mating connector supplied e Partnumber A 1333 0195 Axis sensors 200 mm cable terminated with connector mating part supplied e Partnumber A 5091 0725 Workpiece sensors 2000 mm cable terminated with connector mating part supplied e with inline connector part number A 5091 0720 e with panel mount connector part number A 5091 0730 System hardware specification 11 2 System hardware specification 2 1 Thermal effect compensation TEC daughtercard specification 2 1 1 General description The daughtercard assembly has a metal end plate for fixing to the rear panel of the UCC1 UCC2 controller
29. uctive glue It is supplied with a 200 mm cable attached and a male JST connector fitted at the end the mating part of the connector being supplied as part of the axis sensor kit NOTE A maximum of 24 sensors can be used in any combination of workpiece and axis sensors 2 3 2 Dimensions 200 mm F 7 6 4L 3 7 mm 2 3 3 Mating connectors Manufacturers part numbers JST JST connector SMP 02V NC JST pin SHF 001T 0 8BS System specification 15 2 4 Workpiece sensor specification 2 4 4 General description Workpiece sensors are required to monitor and compensate for any temperature changes within the workpiece material They can be magnetically mounted or clamped to the workpiece and is housed in a 20 mm aluminium body with a polyacetal sleeve The sensor should be handled by this sleeve in order to reduce any thermal effects It is supplied with a cable length of 2000 mm and has a LEMO connector fitted the mating part of the connector is supplied as part of the workpiece sensor kit in either panel mount or in line form NOTE A maximum of 24 sensors can be used in any combination of workpiece and axis sensors 2 4 2 Dimensions 2000 mm Reverse NN Z Two magnets for mounting on ferrous material 2 4 3 Mating connectors Manufacturers part numbers LEMO In line connector PHG 1B 304 CYMD52 Panel mount EGG 1B 304 CLL Pin allocation Looking at the pins with the red dot on the LEMO pointing up
30. uring the linear mapping of the axis This scale temperature is then introduced in the TEC file An alternative but more time consuming method consists of calibrating the axis sensors and mapping the scale back to a scale error at 20 C In this case the reference scale temperature in the TEC file is 20 C 28 Operation 5 Operation 5 1 Using the thermal effect compensation TEC system The thermal effect compensation daughtercard measures the electrical resistance of each of the sensors This resistance is then converted to temperature by the card and reported to the UCC software The UCC software can then apply the appropriate thermal compensation System features include Detecting if a sensor is connected or if a channel is open circuit In this case the affected channel will default to the thermal reference see section 3 7 3 Detecting if a channel is faulty or short circuited Accepting a maximum of 24 sensors This can be any combination of workpiece and axis sensors Temperature readings for each channel can be read by the user Workpiece and axis material thermal coefficients of expansion can be input by the user The user has the ability to turn on off machine and or workpiece thermal effect compensation The user has the ability to specify units e g C F mm in CAUTION Care should be taken when entering parameters in the TEC file that these are in the correct units The user can set predefin
31. wards Pair A Top left pin and bottom left pin PairB Top right and bottom right NOTE Ensure the sensor is connected to the daughtercard with one pin from pair A and one pin from pair B 16 System specification 2 4 4 Part attached switch The part attached switch is optional and can be implemented using the connections shown in section 2 2 It allows the user to indicate to their application software when the workpiece sensor is clamped to the workpiece and when temperature compensation for the workpiece can commence 2 5 Sensor resistance checks The following resistance check test is recommended during system installation once all sensor cabling has been completed after every hardware change to the system e g sensor cable or switch change every six months after the system has been commissioned to check for any sensor switch failure or cabling issues 2 5 1 Resistance check procedure Regulate the temperature of the CMM room to a temperature between 16 C and 28 C Allow the CMM to stabalise thermally for a minimum of one hour Measure the sensor resistance from the 44 way D type socket that the sensors are wired into This is the resistance that the TEC card measures cable plus sensor resistance All workpiece and axis sensor resistance measurements should be within this range 8 4 KQ lt R lt 15 7 KQ 2 5 2 Part attached switch check Check the resistance b
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