Renishaw TP1 User manual

Touch-trigger probe systems - TP1, TP2, TP6,
TP6A, PH1, PH6, PH6M
Document part number H-1000-5021-08-B
Touch-trigger probe systems - TP1, TP2, TP6, TP6A, PH1, PH6, PH6M
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Issued 10 2019
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General information
© 1987 ‐ 2019 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, the probe symbol used in the RENISHAW logo and REVO are registered trademarks of Renishaw plc in the United Kingdom and
other countries. apply innovation and names and designations of other Renishaw products and technologies are trademarks of Renishaw
plc or its subsidiaries.
All brand names and product names used in this document are trade names, service marks, trademarks, or registered trademarks of their
respective owners.
All trademarks and trade names are acknowledged.
WEEE
The use of this symbol on Renishaw products and/or accompanying 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.
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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.
Packaging
To aid end user recycling and disposal the materials used in the different components of the packaging are stated here:
Packaging component Material 94/62/EC code 94/62/EC number
Outer box Corrugated fibreboard PAP 20
Outer box Non-corrugated fibreboard PAP 21
Outer box Polypropylene PP 5
Packing foam Polyurethane PU 7
Bag Low density Polyethylene LDPE 4
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Product compliance
EU declaration of conformity
Contact Renishaw plc or visit www.renishaw.com/EU for the full EU declaration.
EMC conformity
This equipment must be installed and used in accordance with this installation guide. This product is intended for industrial use only and
should not be used in a residential area or connected to a low voltage power supply network which supplies buildings used for residential
purposes.
REACH regulation
Information required by Article 33﴾1﴿ of Regulation ﴾EC﴿ No. 1907/2006 ﴾“REACH”﴿ relating to products containing substances of very high
concern (SVHCs) is available at:
www.renishaw.com/REACH
China RoHS
Contact Renishaw plc or visit www.renishaw.com/ChinaRoHS for the full China RoHS tabulation.
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Warnings
Pinch hazards exist between parts and between moving and static parts. Do not hold the probe head during movements, or during manual
probe changes.
Beware of unexpected movement. The user should remain outside of the full working envelope of probe head/extension/probe combinations.
In all applications involving the use of machine tools or CMMs, eye protection is recommended.
For instructions regarding the safe cleaning of Renishaw products, refer to the Maintenance section of the relevant product documentation.
Remove power before performing any maintenance operations.
Refer to the machine supplier's operating instructions.
It is the machine supplier's responsibility to ensure that the user is made aware of any hazards involved in operation, including those
mentioned in Renishaw product documentation, and to ensure that adequate guards and safety interlocks are provided.
Under certain circumstances the probe signal may falsely indicate a probe seated condition. Do not rely on probe signals to stop machine
movement.
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Introduction
Co-ordinate measuring machines (CMMs) have evolved from their origins in simple layout machines and manually operated systems, to
highly accurate, automated inspection centres.
A major factor in this evolution has been the touch-trigger probe and other forms of inspection probe, together with subsequent Renishaw
innovations such as the motorised probe head and automatic probe exchange system for unmanned, flexible inspection.
It all began with Rolls-Royce engines for the Anglo-French Concorde when a unique solution was required for accurate pipe measurement.
The result was the first touch-trigger probe: a 3D sensor capable of rapid, accurate inspection with low trigger forces. From this unique
starting point, Renishaw has established a range of precision probes and accessories for CMMs unequalled around the world.
Renishaw's success has been made possible by the close working relationship the company enjoys with CMM manufacturers and users. The
market is constantly striving to extend the frontiers of inspection technology. By close liaison throughout the design, development and
evaluation processes, Renishaw keeps in step with the market's needs ... and, in many cases, one step ahead.
From the Group's centre of operations in Wotton-under-Edge, Renishaw's products are exported to the world's leading industrialised nations;
a fact that has been rewarded by nine Queen's Awards.
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Probe system overview
In the context of this user's guide a probe system comprises a stylus mounted onto a touch-trigger probe that in turn is connected to a CMM
using a manual probe head.
The intention of this guide is to cover the most common combinations of the manual probe heads and touch-trigger probes in an attempt to
assist the user in making a product choice that is best for any particular application.
The guide covers the features of each of the standard kinematic touch-trigger probes and complementary manual probe heads.
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Probe product overview
Renishaw's CMM touch-trigger probes detailed in this user's guide are designed to suit any CMM, but their individual characteristics are
outlined below:
TP1(S) A robust shank-mounted probe offering generous overtravel -
ideally suited to manual CMMs.
TP2 - 5-way A compact probe allowing component penetration - ideally suited to
CNC / DCC machines.
TP6 Complementing the TP2 series, but carrying longer and heavier styli,
this probe is suited to general-purpose applications.
TP6A This probe has all the functions of the TP6 probe and in addition the
patented Renishaw autojoint that permits fast probe exchange
without the need to requalify.
Renishaw also manufacture other touch-trigger probes which are not detailed in the user's guide.
For details of these and other Renishaw products, visit the Renishaw website at www.renishaw.com.
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Principles of operation
The principle component of Renishaw touch-trigger probes is the kinematic location as shown below - a mechanical device that has the ability
to return the stylus ball to the same repeatable position following any deflection.
The kinematic location consists of a pivotal plate [1] that is spring-loaded against three bearing points [2] by a helical compression spring [3].
These bearing points are formed by a combination of rollers and ball bearings.
Bearing points act as electrical contacts such that when the pivotal plate is deflected, the electrical circuit changes its characteristics and causes
the probe interface to send a trigger to the CMM controller.
Following this trigger event, the stylus ball must be removed from contact with the surface to enable the probe to return the stylus ball to its
repeatable position.
1 Pivotal plate
2Three bearing points
3Helical compression spring
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Probe description and operation
TP1(S) touch-trigger probe
The TP1(S) touch-trigger probe (illustrated below) is a robust shank-mounted probe with a generous overtravel which is especially suited to
manual CMMs. It is of a maintenance-free, sealed construction to provide a long working life.
The TP1(S) incorporates an M3 stylus mount which ensures compatibility with Renishaw's extensive M3 and M2 stylus and accessory range
using the appropriate stylus adaptor where necessary.
1Shank
2TP1(S) probe body
3Trigger force adjustment screw
4Probe cable (not supplied)
5Stylus (not supplied)
62.5 mm AF Allen key to adjust trigger force
7S7 stylus tightening tool
8Probe status LED
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TP2-5-way touch-trigger probe
The TP2-5-way touch-trigger probe shown below is a compact (13 mm diameter) general-purpose probe suitable for use on all types of
CMM. It has an M8 mounting thread that ensures compatibility with Renishaw's comprehensive range of probe heads and extension bars.
The TP2 is of a maintenance-free construction to provide a long working life.
It incorporates an M2 stylus mount giving access to Renishaw's extensive M2 stylus range and accessories.
1TP2 - 5-way probe
21.5 mm AF Allen key to adjust trigger force
3S7 stylus tightening tool
4Stylus (not supplied)
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TP6 touch-trigger probe
The TP6 touch-trigger probe illustrated below combines the accuracy, flexibility and M8 mounting thread of the TP2-5-way probe with the
rugged construction and generous overtravel of the TP1(S).
The larger diameter of the TP6 (25 mm) allows the probe to carry longer and heavier styli configurations than the TP2-5-way, allowing it to be
used successfully on both universal DCC and manual CMMs.
It incorporates an M3 stylus mount which allows compatibility with Renishaw's extensive M3 and M2 stylus and accessory range using the
appropriate stylus adaptor where necessary.
1TP6 probe
21.5 mm AF Allen key to adjust trigger force
3S7 stylus tightening tool
4Stylus (not supplied)
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TP6A touch-trigger probe
The TP6A touch-trigger probe has all the features of the TP6 with the added benefit of the Renishaw autojoint. This is a highly repeatable
kinematic joint which allows rapid probe exchange without the need to requalify the probe tip. It can be operated either manually, using an
S10 autojoint key, or automatically, using the autochange rack system.
This probe can be used successfully on both universal DCC and manual CMMs. It incorporates an M3 stylus mount which offers compatibility
with all Renishaw's extensive M3 and M2 stylus and accessory range.
1TP6A probe
2S10 autojoint key
31.5 mm AF Allen key to adjust trigger force
4S7 stylus tightening tool
5Stylus (not supplied)
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Installation
Electrical installation
TP1(S)
The 5-pin DIN socket on the TP1(S) probe provides the connections (shown below) to the probe interface.
Pin Function
1LED cathode
2Screen
3LED anode
4Probe circuit
5Probe circuit
TP2 and TP6
Connections to the probe interface are made through the M8 mounting joint.
TP6A
Connections to the probe interface are made through the autojoint.
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Fitting a stylus
To fit a stylus to a Renishaw touch-trigger probe, insert the correct threaded stylus or stylus adaptor into the stylus mount and tighten the
stylus securely using the S7 stylus tool provided. Tightening the stylus by any means other than the stylus tool provided (e.g. spanners, drill
bits, etc.) may cause internal damage to the probe mechanism.
NOTE: All stylus joints should be clean and free from dirt or debris.
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Applications guide
Stylus selection
In the majority of probing applications, to maximise accuracy we recommend that you:
Keep styli short and stiff
The more the stylus bends or deflects, the lower the accuracy. Probing with the minimum stylus length for your application is recommended
and where possible the use of one piece styli is suggested. Probing with excessive styli / extension combinations should therefore be avoided.
Keep the stylus ball as large as possible
This will ensure maximum ball / stem clearance whilst providing a greater yet rigid effective working length (EWL). Using larger ruby balls
also reduces the effect of surface finish of the component being inspected.
EWL is the penetration that can be achieved by any ruby ball before its stem fouls against the feature. Generally, the larger the ball diameter,
the greater the EWL (see figure below).
AOverall working length
BEWL
CBall / stem clearance
EWL can also be affected by assembly tolerances. For this reason, Renishaw styli are assembled to exacting standards in controlled conditions.
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Trigger force
Trigger force is the amount of pressure applied by the helical compression spring onto the pivotal plate and bearing points to hold the stylus
mount in place.
The trigger force is preset by Renishaw but can be altered for any of the following reasons:
to permit the use of longer styli on the probe
to permit the use of heavier styli on the probe
if the preset trigger force has decreased due to probe use
if the acceleration of the CMM is causing illegal triggers
NOTE: Changing the probe trigger force will affect the probe's measurement performance. It is important to requalify the probe
configuration and check the measurement performance of the probe system after any adjustment has been made to the trigger
force.
All Renishaw's touch-trigger probes have an optimum trigger force setting for general purpose applications as detailed in the table below.
Trigger force:
CMM probes Stylus length (typical) Optimum trigger force (preset
by Renishaw) Trigger force range
TP1(S) 31 mm (PS1-1R) 0.15 N 0.1 N - 0.5 N
TP2-5 way 10 mm (PS12R) 0.07 N - 0.08 N 0.07 N - 0.15 N
TP6 / TP6A 21 mm (PS1-12R) 0.11 N - 0.13 N 0.11 N - 0.3 N
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Checking trigger force with the Renishaw gram gauge
1. Ensure that the probe is held firmly in position (preferably on a CMM) and connected to an interface to detect a probe trigger.
2. Establish the direction of trigger which gives the minimum resistance. The most practical way of doing this is to gently deflect the stylus
with a finger, trying different directions. There are three lobes which produce three maximum and three minimum force directions. These can
easily be found with a minimum of practice.
3. Set the gram gauge maximum force indicator to the zero point and place the gram gauge flat on the CMM table. Move the stylus tip to the
same height above the surface as the gram gauge lever.
4. Slide the gram gauge slowly sideways so that the flat point on the end of the lever touches the probe stylus ball (ensuring that the probe is
deflected in the low force direction). Very slowly continue to move the gram gauge until the probe triggers, at which point stop immediately,
back off the gauge and read the maximum force indicator.
5. Repeat this procedure three or four times to ensure consistent results.
NOTE: To convert gf to Newtons the following formula is required:
Newtons = gf / 100
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Trigger force adjustment - TP1(S)
The trigger force of a TP1(S) probe is preset by Renishaw at an optimal performance setting, but can be altered if necessary as follows:
1. Remove the probe from the quill of your CMM.
2. Insert a 2.5 mm AF Allen key (supplied with every probe) into the centre of the shank until you locate a grub screw.
3. Adjust this grub screw to alter the trigger force of the probe:
Clockwise increases the trigger force
Anticlockwise decreases the trigger force
Trigger force adjustment - TP2 and TP6
The trigger force of TP2 and TP6 probes is preset by Renishaw at an optimal performance setting, but can be altered if necessary as follows:
1. Remove the probe from the probe head on the quill of your CMM.
2. Insert a 1.5 mm AF Allen key (supplied with every probe) into the hole in the centre of the M8 thread until you locate a grub screw.
3. Adjust this grub screw to alter the trigger force of the probe:
Clockwise increases the trigger force
Anticlockwise decreases the trigger force
Trigger force adjustment - TP6A
The trigger force of a TP6A probe is preset by Renishaw at an optimal performance setting, but can be altered if necessary as follows:
1. Remove the probe from the probe head on the quill of your CMM.
2. Ensure that the cam of the autojoint is in the unlocked position.
3. Insert a 1.5 mm AF Allen key (supplied with every probe) through the cam towards the centre of the TP6A until you locate a grub screw.
4. Adjust this grub screw to alter the trigger force of the probe:
Clockwise increases the trigger force
Anticlockwise decreases the trigger force
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Manual probe heads product overview
Renishaw manual probe heads detailed in this user's guide are designed to suit any CMM and this specifically covers:
PH1
PH6
PH6M
Each is designed for a specific application and purpose. The figure below explains the product interconnections and both include the MH8 and
MIH for completeness.
Probe head / touch-trigger probe compatibility:
Probe head Number of probes
carried Orientation - A-axis Orientation - B-axis Orientation - Repeatable Probe joint
PH1 1 M8 bush
PH6 1M8 bush
PH6M 1Autojoint
MIH 1Autojoint
MH8 1M8 bush
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