TP7 user's guide - Renishaw resource centre
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1. Many standard gauging practices such as measurement of distance between bore centres are largely unaffected by probe pretravel variation errors Issued 11 2014 15 RENISHAW amp apply innovation TP7 user s guide http www renishaw com Stylus selection To obtain the best performance apply the following considerations when selecting and fitting a stylus e Use the shortest possible stylus length e Minimise the mass of the stylus by using the types with ceramic or GF stems where possible refer to the Renishaw stylus catalogue for further information e Work with the recommended stylus limits see graph below in recommended stylus limits e Ensure that stylus balls threads and mating faces are kept clean Tighten styli using only the tools provided Always qualify the styli at the gauging speed set for the part measurement program if the speed is changed re qualify the stylus tip Use the largest ball diameter to minimise surface finish effect on measurement Whenever possible use only styli from the M4 range it is possible to adapt to the M3 or M2 styli but this will result in reduced measuring accuracy and the user is advised to establish the suitability for the application Recommended stylus limits The figure below shows the two parameters of a stylus configuration which when plotted onto the graph used to determine stylus limits determine whether or not the stylus is within the specified limits2. Inspect and clean the autojoint connector Refer to Maintenance section Requalify stylus tips 20 Renishaw plc New Mills Wotton under Edge Gloucestershire GL12 8JR United Kingdom T 44 0 1453 524524 F 44 0 1453 524901 www renishaw com cmmsupport For worldwide contact details please visit our main website at www renishaw com contact Issued 11 2014 RENISHAW apply innovation E
3. RENISHAW amp apply innovation TP7 user s guide TP7 user s guide Documentation part number H 1000 5010 06 A Issued 11 2014 1 RENISHAW amp apply innovation TP7 user s guide http www renishaw com General information 2003 2014 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 RENISHAW 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 brand names and product names used in this document are trade names service marks trademarks or registered trademarks ol their respective owners Windows XP Windows 2000 Vista and Windows 7 are registered trade names of the Microsoft Corporation All trademarks and trade names are acknowledged x The use of this symbol on Renishaw products and or accom
4. amp apply innovation TP7 user s guide Installation procedure Mounting the probe on the probe head CAUTION Great care must be taken not to drop the probe when installing Whenever practical follow the instructions given later in this section to assemble the stylus to the probe before installing the probe on the probe head Locate the probe on the probe head ensuring that the alignment dots on the head and probe are adjacent and then lock the autojoint by clockwise rotation of the slotted actuator shaft using an S10 key supplied Issued 11 2014 12 RENISHAW amp apply innovation TP7 user s guide http www renishaw com Assembling a stylus to the probe Screw the stylus into the threaded mount on the probe until finger tight Fit the stylus tool s supplied into the stylus cross hole and tighten using finger pressure The stylus tool is designed to bend if over tightened preventing damage to the probe If the stylus has been assembled with the probe in situ on the probe head it may be necessary to reset the probe Refer to the following section Resetting the probe Issued 11 2014 za RENISHAW apply innovation TP7 user s guide http www renishaw com Resetting the probe The probe will automatically reset to the armed state when the PI 7 3 is powered up or the TP7M is fitted to the probe head It may sometimes be necessary to perf
5. 1 um 0 00004 in Traser tss O XY plane 0 02 N Z axis 0 15 N Overtravel force 11 75 N Weight 85 g 3 oz Maximum extension on a PH10 series head 200 mm 7 87 in Maximum recommended stylus length M4 styli range 50 mm 5 9 in steel 80 mm 7 08 in GF Mounting method Multi wired autojoint Suitable interface PI 7 3 Automatic probe changing Autochange rack Operating temperature range 10 C 40 C 50 F 104 F The data above applies for test conditions as follows e Stylus length 50 mm 1 97 in e Stylus velocity 240 mm min 1 57 ft min Test performed on a CMM specification U3 0 48 um L 1000 Issued 11 2014 8 RENISHAW amp apply innovation TP7 user s guide http www renishaw com 3D measuring performance To standard ASME B89 4 1 1997 for point to point measurement Typically the 3D measuring performance spherical characteristic is better than 2 um This means that no matter from which direction the probe triggers the maximum error will be less than 2 um when standard qualification techniques have been employed using styli up to 50 mm long The 3D measuring performance of the probe considers the following sources of probe error e Unidirectional repeatability e XYZ pretravel variation e Stylus ball sphericity The table below only applies to TP7M with the additional styli Stylus configuration Performance parameters Sen
6. TP7 user s guide RENISHAW amp apply innovation http www renishaw com False air triggers occur at fast traverse speed PI 7 3 indicators Possible causes DAMPED LED OFF Stylus is too large or heavy SEATED LED operates normally Traverse speed is too fast The probe does not rearm after taking a point PI 7 3 indicators TP7 LED ON moving off the work piece surface Possible causes SEATED LED OFF There is an unexpected loss of accuracy PI 7 3 indicators Possible causes TP7 LED ON Stylus damaged or ball is dirty SEATED LED operates Stylus is too large or heavy normally Excessive vibration from CMM Use stylus arrangements within recommendations Check CMM air supply Maintain CMM air bearing system Reduce traverse speed The reset speed is to slow or the stylus has slowly deflected while Ensure that the direction of gauging and back off is normal to the workpiece surface Refer to the section Resetting the probe Inspect and clean stylus ball or replace and requalify the stylus Check that the stylus joints are tight The probe head is damaged or the mounting of the head DAMPED LED is OFF at touch point to the CMM quill is faulty The autojoint connector is damaged or dirty The gauging speed has changed The trigger level has changed Issued 11 2014 Use stylus arrangements within recommendations
7. traverse it is necessary to reduce probe sensitivity to prevent vibration causing unwanted triggers The CMM controller automatically switches the PI 7 3 into a low sensitivity mode such that the vibration triggers are prevented but a trigger is still issued to stop CMM motion if an unexpected collision occurs This mode is known as probe damped mode and is indicated by an LED on the front panel Issued 11 2014 RENISHAW amp apply innovation TP7 user s guide http www renishaw com i NOTE The probe cannot take accurate points when damped mode is selected The CMM manufacturer sets the configuration of the PI 7 3 and it should not be necessary for the user to make adjustments except to operate the reset button as explained later in the handbook Part number summary Part number Description A 1073 0121 TP7M probe kit A 1073 0261 TP7M EP probe kit A 1073 0122 TP7M probe and stylus kit A 1073 0123 TP7M probe and stylus kit including PS1 16R A 1073 0263 TP7M EP probe and stylus kit including PS1 16R A 5726 0100 PI 7 3 interface Issued 11 2014 6 RENISHAW amp apply innovation TP7 user s guide http www renishaw com Specification The following data is derived from test rig measurements and may not represent the performance achievable on a CMM Please contact your CMM supplier for overall system accuracy information Sense directions 6 way X Y Z 3
8. D accuracy test to ISO 10360 Pt 2 N A Unidirectional repeatability 20 um Trigger level 1 0 25 um 0 00001 in Trigger level 2 0 25 um 0 00001 in XY 2D form measurement deviation Trigger level 1 0 25 um 0 00001 in Trigger level 2 0 5 um 0 00002 in XYZ 3D form measurement deviation Trigger level 1 0 5 um 0 00002 in Trigger level 2 1 um 0 00004 in Trigger force at stylus tip XY plane 0 02 N Overtravel force XY plane 0 78 N 11 75 N 85 g 3 oz Maximum extension on a PH10 series head 200 mm 7 87 in Maximum recommended stylus length M4 styli range 150 mm 5 9 in steel 180 mm 7 08 in GF Mounting method Multi wired autojoint Suitable interface PI 7 3 Automatic probe changing Autochange rack Operating temperature range 10 C 40 C 50 F 104 F Issued 11 2014 7 RENISHAW amp apply innovation TP7 user s guide http www renishaw com TP7M EP enhanced performance 3D accuracy test to ISO 10360 Pt 2 lt 0 6 um 0 000024 in Unidirectional repeatability 20 um Trigger level 1 0 25 um 0 00001 in Trigger level 2 0 25 um 0 00001 in XY 2D form measurement deviation Trigger level 1 0 25 um 0 00001 in Trigger level 2 0 5 um 0 00002 in XYZ 3D form measurement deviation Trigger level 1 0 5 um 0 00002 in Trigger level 2
9. anel will turn OFF Also the probe head LED will turn OFF The probe should be allowed to remain in the triggered state only for the minimum time necessary to reverse the CMM motion and back off from the workpiece Speed of operation The TP7M will work at touch speeds between 0 5 mm s and 40 mm s m NOTE For accurate measurement it is essential that the moves used to qualify the probe and subsequent measurement moves are carried out at the same speed to within 10 Use of touch speeds greater than 40 mm s will result in significantly reduced measuring performance Use of touch speeds less than 0 5 mm s beware of glancing touches or joystick operations will result in a possible corruption of the system s trigger and seated reference positions Pretravel variation Pretravel is the distance the probe travels between the stylus touching the surface and a trigger signal being sent to the CMM Pretravel is compensated by the CMM computer by probe qualification However due to the design of standard probes and the changes in force required to trigger from different directions there is a small variation in this pretravel This is called pretravel variation On most CMMs using standard software and very long styli i e up to 100 mm pretravel variation can become a large factor in the probe s total margin of error It is most evident in inspection routines requiring measurement of form e g following contours or measuring roundness
10. e http www renishaw com Product description TP7M probe The stylus is coupled to a strain sensing structure that is protected against excessive stylus displacement by a 6 way kinematic overtravel mechanism Silicon strain sensors which detect the small gauging forces applied to the stylus tip are connected directly to the PI 7 3 interface via the Renishaw autojoint connector the probe head and associated wiring The sensor signals are amplified and the resultant probe signals proportional to the changes of strain are compared with reference voltages to determine the status of the probe A CAUTION The TP7M is susceptible to damage if dropped It must therefore be handled with care Dimensions lt E 28 8 R Q l 5 mm 0 19 in Z overtravel Maxi xY J 5 mm 0 19 in RRRS v Z overtravel PI 7 3 interface The PI 7 3 is a dedicated signal conditioner for interfacing the TP7M and TP7M EP probes or kinematic switching probes TP2 TP20 or TP6 TP6A to the CMM controller The recognition of the probe type is automatic The interface determines the probe status which is either triggered or seated armed and transmits signals to the CMM controller Status and control signals are passed between the PI 7 3 interface other Renishaw equipment and the CMM controller via the product interconnection system PICS ports RENISHAW PI7 3 During high speed position moves fast
11. hanges to Renishaw equipment previously sold Issued 11 2014 3 RENISHAW amp apply innovation TP7 user s guide http www renishaw com Introduction The TP7M and TP7M EP enhanced performance touch trigger probes provide superior measuring performance over kinematic switching probes throughout a wide range of gauging speeds True 6 way sensing X Y Z with any stylus offers greater flexibility of application The extended operating life makes the TP7M and TP7M EP suitable for the most highly automated and demanding measuring tasks For applications requiring the highest possible accuracy the TP7M EP version is specified for the smallest form measurement error The TP7M and TP7M EP are equipped with the Renishaw autojoint connector to enable repeatable automatic probe changing when utilising the Renishaw autochange system The probes may be mounted in the quill of the CMM using a PH10M PLUS motorised probe head to provide automatic articulation Alternatively the PH6M fixed probe head may be used The TP7M and TP7M EP probes must be interfaced to the CMM controller using the dedicated PI 7 3 probe interface unit The PI 7 3 automatically detects and interfaces with the Renishaw TP20 TP6 and other types of kinematic switching probe so that the optimum probe type for the application can be easily used on the same machine Issued 11 2014 4 RENISHAW amp apply innovation TP7 user s guid
12. of operation The stylus parameters shown below are the mass M and the length L from the stylus mounting to the centre of gravity of the stylus Stylus limits Graph to determine stylus limits Stylus mass M 0 10 20 30 40 50 60 70 Length L from stylus mounting to centre of gravity Issued 11 2014 16 RENISHAW amp apply innovation TP7 user s guide http www renishaw com Trigger level Under certain conditions vibration may cause false air triggers during gauging and it may be necessary to reduce the probe sensitivity False triggers may occur when large or heavy stylus arrangements are used or when there is floor transmission from nearby machinery or vehicles e Trigger level 1 the highest sensitivity mode provides the best measuring accuracy e Trigger level 2 lower sensitivity to vibration but with a small loss of measuring accuracy The trigger level is selected by switch number 9 on the rear panel of the PI 7 3 interface e Level 1 switch 9 to right e Level 2 switch 9 to left kad NOTE The sensitivity in probe damped mode is fixed and is not changed by the position of switch 9 The stylus tip s must be re qualified after changing the trigger level setting Probing force This is the force required at the stylus tip to trigger the probe The TP7M system is designed to trigger at very low forces to minimise distortion of the stylus workpiece or CMM struct
13. orm a manual reset for example after fitting a new stylus Press the RESET button on the front panel for 2 seconds to reset the probe to the armed seated state RENISHAW PI7 3 Indicator Colour Function POWER ON Mains power in TYPE STD Kinematic probe selected TYPE TP7 TP7M probe selected PROBE SEATED Green ON Probe armed seated OFF Probe triggered or no probe connected PROBE DAMPED Yellow PDAMP asserted CAUTION Pressing the reset button inhibits probe triggers Prior to pressing the button the CMM must be stationary in manual mode with the stylus clear of the workpiece T NOTE The action of unlocking and locking the PH10 PLUS motorised head will perform the same function as the RESET button Issued 11 2014 14 RENISHAW amp apply innovation TP7 user s guide http www renishaw com Probe operation The probe has two normal operating states armed or triggered The probe should be in the armed state except for the moments when the stylus is deflected against the workpiece Probe armed When the probe is armed sometimes called seated or reset the following PI 7 3 front panel indicators will be ON e POWER ON e TYPE TP7M when a TP7M is fitted o STD when a TP2 is fitted e PROBE SEATED Additionally the probe head LED will be ON Probe triggered Normally when the stylus touches the workpiece the SEATED LED on the PI 7 3 front p
14. panying documentation indicates that the product should not be mixed with the general household waste upon disposal It is the responsibility of the end user to dispose of this product at a designated collection point for waste electrical and electronic equipment WEEE to enable reuse or recycling Correct disposal of this product will help save valuable resources and prevent potential negative effects on the environment For more information please contact your local waste disposal service or Renishaw distributor 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 Issued 11 2014 2 RENISHAW amp apply innovation TP7 user s guide 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 c
15. sitivity setting level 1 Sensitivity setting level 2 100 mm long Unidirectional repeatability 2D form measurement deviation 3D form measurement deviation 1 5 um 150 mm long Unidirectional repeatability 2D form measurement deviation 3D form measurement deviation 5mm long 2D form measurement deviation 50 mm offset 3D form measurement deviation 50 mm long 2D form measurement deviation 50 mm offset 3D form measurement deviation 1 um Typical performance data for TP7M probe The following information provides examples of the expected measuring performance of the TP7M when using M2 M3 and M4 styli in accordance with the stylus selection guidelines given earlier in this document In all cases the contour lines show probe performance figures using straight or right angled stylus configurations For the configuration shown where M2 M3 M4 adaptors and M2 styli are used the expected measuring performance from the probing system would be within 1 5 um Issued 11 2014 9 RENISHAW amp apply innovation TP7 user s guide http www renishaw com TP7M using suitable M2 M3 and M4 adaptors and M2 styli 20 40 60 0 mm mm mm TP7M using suitable M3 and M4 adaptors and M3 styl 40 mm ee 60 mm 80 mm Issued 11 2014 RENISHAWE apply innovation TP7 user s guide TP7M using M4 styli Issued 11 2014 11 RENISHAW
16. ure during measurement Issued 11 2014 17 RENISHAW amp apply innovation TP7 user s guide http www renishaw com Overtravel forces The ability to carry long or heavy stylus confi gurations requires the TP7M to have overtravel forces significantly higher than probing forces Because these overtravel forces are experienced beyond the trigger point but within the probe overtravel measurement accuracy is not affected For measurement of very delicate components or use of small styli 0 3 mm or 0 5 mm the overtravel forces may be suffi cient to damage the surface or break the stylus The forces experienced at the stylus tip can be reduced by either extending the stylus tip further away from the probe as shown below or minimising the probe overtravel within the touch cycle as shown below Extending the stylus tip from the probe Probe axis TP7M force deflection profiles 0 O HIGHMID 19 Kinematic 100 1000 trigger point yield Stylus deflection ym Issued 11 2014 18 RENISHAW amp apply innovation TP7 user s guide http www renishaw com Fault finding The probe fails to trigger when the stylus touches the workpiece but the probe operates normally when the stylus is deflected by hand PI 7 3 indicators Possible causes SEATED LED ON The trigger speed is too low Probe normally to the workpiece surface Increase gauging speed The stylus is too heav
17. y Refer to the section Stylus selection for recommendations The probe will not arm or the probe does not stay armed after pressing the RESET button PI 7 3 indicators Possible causes STD LED ON Probe sensor faulty Remove probe and test by substitution SEATED LED OFF Probe connections open circuit Check wiring from probe to PI 7 3 interface The probe will not arm or the probe does not stay armed after pressing the reset button The head LED is OFF PI 7 3 indicators Possible causes TP7 LED ON Probe sensor faulty or damaged by collision Remove probe and test by substitution SEATED LED OFF False air triggers occur while the CMM is stationary PI 7 3 indicators Possible causes TP7 LED ON Probe sensor failure Remove probe and test by substitution SEATED LED operates Faulty connection in autojoint probe head or Inspect autojoint pins check continuity of wiring from probe to normally wiring interface Excessive vibration from external source Eliminate source or isolate CMM Excessive vibration from CMM Check air supply Maintain CMM False air triggers occur at gauging speed PI 7 3 indicators Possible causes DAMPED LED OFF Stylus is too large or heavy Use stylus arrangements within recommendations SEATED LED operates normally Excessive vibration from CMM Check CMM air supply Maintain CMM air bearing system Issued 11 2014 19
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