renishaw TP20 Installation Guide

Installation and user’s guide

H-1000-5131-01-A

TP20 probe for FARO arm

© 2007 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

Considerable effort has been made to ensure that the contents of this
document are free from inaccuracies and omissions. However, Renishaw
makes no warranties with respect to the contents of this document and
specifically disclaims any implied warranties. Renishaw reserves the right
to make changes to this document and to the product described herein
without obligation to notify any person of such changes.

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 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-1000-5131-01-A

Issued: 12 2007

TP20 probe for FARO arm

installation and user’s guide

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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 equipment

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 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
for Renishaw equipment. 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.

Patents

Aspects of the TP20 probing system and aspects of similar systems
are the subject of the following patents and patent applications.

Care of equipment

EP 548328
EP 750171
EP 501710
EP 826136
EP 566719

JP 3294269
JP JP 3279317
JP 2,510,804
JP 505,622/1999

US 5,323,540
US 5,505,005
US 5,327,657
US 5,404,649
US 5,339,535
US 5,918,378
US 6012230

Contents

Contents

1 Introduction ...................................................................................4

2 Product description .......................................................................5

2.1 The FARO TP20 touch-trigger probe kit ............................... 5

2.1.1 The probe body .......................................................5

2.1.2 The probe modules.................................................. 7

3 Product installation ........................................................................ 9

3.1 Fitting the TP20 probe onto a FARO arm ............................. 9

3.2 Fitting a stylus onto the probe module .................................9

3.3 Fitting the probe module and stylus onto the probe body ..11

4 Technical data - TP20 probe module changing touch-trigger probe .. 12

4.1 Measuring performance .....................................................12

4.1.1 Probing forces and overtravel limits ....................... 13

4.1.2 Probe module changing repeatability .................... 13

4.1.3 Technical specification ........................................... 14

5 Applications guide ....................................................................... 15

5.1 Probe module selection ......................................................15

5.1.1 The low force probe module .................................. 16

5.1.2 The standard force probe modules ........................16

5.1.3 The medium force probe module ...........................16

5.1.4 The extended force probe module .........................16

5.1.5 The 6-way probe module ....................................... 16

5.2 Stylus selection ..................................................................17

5.2.1 Recommended stylus limits ................................... 19

6 Product maintenance .................................................................. 24

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Introduction

1 Introduction

The Renishaw TP20 probe module changing touch-trigger probe is
a 5-way or 6-way kinematic probe with the facility to change stylus
configurations without the need for re-qualification.

The TP20 comprises a two-piece design – a probe body and
detachable probe module(s).

TP20 probe body

TP20 probe module
changing touch­trigger probe

Figure 1 - The TP20 probe

Product description

2 Product description

2.1 The FARO TP20 touch-trigger probe kit

The standard Renishaw TP20 touch-trigger probe kit (see figure 2)
comprises the following primary components:

• One TP20 probe body

• One medium force TP20 probe module (see page 8 for available
combinations)

• Ø 6 mm (0.24 in) x 10 mm (0.39 in) stylus

• Ø 2 mm (0.08 in) x 10 mm (0.39 in) stylus

• Probe and stylus tools

2.1.1 The probe body

The probe body incorporates a standard Renishaw M8 × 1.25 screw
connector mount and is designed to house the mating half of the
probe module’s kinematic coupling.

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Product description

Figure 2 - The TP20 probe for FARO arm kit

Product description

2.1.2 The probe modules

Each probe module, which houses the kinematic switching touch
sensor mechanism, carries the stylus assembly and provides
overtravel in the X, Y and +Z axes (–Z is offered when using the TP20
6-way probe module). Incorporating an M2 stylus mounting, each
probe module is compatible with Renishaw’s comprehensive range of
M2 styli.

Designed to minimise the possibility of probe module misalignment
generating a probe ‘seated’ signal, the probe module is held in position
by a magnetically retained, highly repeatable kinematic coupling.
Electrical contact pins conduct the probe sense voltage through the
coupling.

Trigger force options

The standard force probe module is suitable for most applications
(when used with the recommended stylus range), but sometimes the
effects of stylus length and mass, combined with acceleration and
vibration, can cause the probe to false trigger (these are referred to as
‘spurious triggers’).

To allow the TP20 to be used where acceleration forces would
otherwise result in spurious touches, a choice of higher force probe
modules is available. A low force probe module is also available for
measurement of delicate materials. Refer to the applications guide
later in this document for information on how to select the correct
probe module for your application.

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