Renishaw MH8 User manual

H-1000-5190-04-A
MH8 User’s Guide
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Renishaw plc
MH8 User’s Guide
English - see Part 1 ☞
Manuel de l’utilisateur MH8
Français - voir patie 2 ☞
Benutzerhandbuch MH8
Deutsch - siehe Abschnitt ☞
Guida per l’utente MH8
Italiano - vedi Sez. ☞

MH8 User’s Guide i
Safety
GB
WARNINGS
Beware of unexpected movement. The user should remain outside of the full working
envelope of Probe Head/Extension/Probe combinations.
Handle and dispose of batteries according to the manufacturer's recommendations. Use
only the recommended batteries. Do not allow the battery terminals to contact other metallic
objects.
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.
F
AVERTISEMENTS
Attention aux mouvements brusques.L'utilisateur doit toujours rester en dehors de la zone
de sécuritédes installations multiples Tête de Palpeur/Rallonge/Palpeur.
Suivre les conseils du fabricant pour manipuler et jeter les batteries. Utiliser uniquement les
batteries recommandées.Veiller àce que les bornes de la batterie n’entrent pas en contact
avec d’autres objets métalliques.
Les conseils de nettoyage en toute sécuritédes produits Renishaw figurent dans la section
MAINTENANCE de votre documentation.
Mettre la machine hors tension avant d'entreprendre toute opération de maintenance.
Consulter le mode d’emploi du fournisseur de la machine.

ii MH8 User’s Guide
D
ACHTUNG
Auf unerwartete Bewegungen achten. Der Anwender sill sich immer außerhalb des
Meßtasterkopf-Arm-Meßtaster-Bereichs aufhalten.
Batterien immer gemäß den Anleitungen des Herstellers handhaben und diese
vorschriftsmäßig entsorgen. Nur die empfohlenen Batterien verwenden. Die Batterieklemmen
nicht in Kontakt mit metallischen Gegenständen bringen.
Anleitungen über die sichere Reinigung von Renishaw-Produkten sind in Kapitel WARTUNG
(MAINTENANCE) in der Produktdokumentation enthalten.
Bevor Wartungsarbeiten begonnen werden, mußerst die Stromversorgung getrennt werden.
Beziehen Sie sich auf die Wartungsanleitungen des Lieferanten.
I
AVVERTENZE
Fare attenzione ai movimenti inaspettati. Si raccomanda all'utente di tenersi al di fuori
dell’involucro operativo della testina della sonda, prolunghe e altre varianti della sonda.
Trattare e smaltire le pile in conformitàalle istruzioni del fabbricante. Usare solo pile del tipo
consigliato.Evitare il contatto tra i terminali delle pile e oggetti metallici.
Per le istruzioni relative alla pulizia dei prodotti Renishaw, fare riferimento alla sezione
MANUTENZIONE (MAINTENANCE) della documentazione del prodotto.
Prima di effettuare qualsiasi intervento di manutenzione, isolare dall’alimentazione di rete.
Consultare le istruzioni d’uso del fabbricante della macchina.
Safety

MH8 User’s Guide iii
Safety
E
ADVERTANCIAS
Tener cuidado con los movimientos inesperados. El usuario debe quedarse fuera del grupo
operativo completo compuesto por la cabeza de sonda/extensión/sonda o cualquier
combinación de las mismas.
Las baterías deben ser manejadas y tiradas según las recomendaciones del fabricante. Usar
sólo las baterías recomendadas.No permitir que los terminales de las mismas entren en
contacto con otros objetos metálicos.
Para instrucciones sobre seguridad a la hora de limpiar los productos Renishaw, remitirse a
la sección titulada MANTENIMIENTO (MAINTENANCE) en la documentación sobre el
producto.
Quitar la corriente antes de emprender cualquier operación de mantenimiento.
Remitirse a las instrucciones de manejo del proveedor de la máquina.
P
AVISOS
Tomar cuidado com movimento inesperado. O utilizador deve permanecer fora do perímetro
da área de trabalho das combinações Cabeça da Sonda/Extensão/ Sonda.
Manusear e descartar baterias de acordo com as recomendações do fabricante. Utilizar
apenas as baterias recomendadas. Não permitir que os terminais da bateria entrem em
contacto comoutros objectos metálicos.
Para instruções relativas àlimpeza segura de produtos Renishaw, consultar a secção
MANUTENÇÃO (MAINTENANCE) da documentação do produto.
Desligar a alimentação antes de efectuar qualquer operação de manutenção.
Consultar as instruções de funcionamento do fornecedor da máquina.

iv MH8 User’s Guide
Safety
DK
ADVARSLER
Pas påuventede bevægelser. Brugeren bør holde sig uden for hele sondehovedets/
forlængerens/sondens arbejdsområde.
Håndtér og bortskaf batterier i henhold til producentens anbefalinger. Anvend kun de
anbefalede batterier. Lad ikke batteriterminalerne komme i kontakt med andre genstande af
metal.
Se afsnittet VEDLIGEHOLDELSE (MAINTENANCE) i produkt-dokumentationen for at få
instruktioner til sikker rengøring af Renishaw-produkter.
Afbryd strømforsyningen, før der foretages vedligeholdelse.
Se maskinleverandørens brugervejledning.
NL
WAARSUCHSWINGEN
Oppassen voor onverwachte beweging. De gebruiker dient buiten het werkende signaalveld
van de Sondekop/Extensie/Sonde combinaties te blijven.
De batterijen volgens de aanwijzingen van de fabrikant hanteren en wegdoen. Gebruik
uitsluitend de aanbevolen batterijen. Zorg ervoor dat de poolklemmen niet in contact komen
met andere metaalhoudende voorwerpen.
Voor het veilig reinigen van Renishaw produkten wordt verwezen naar het hoofdstuk
ONDERHOUD (MAINTENANCE) in de produktendocumentatie.
Voordat u enig onderhoud verricht dient u de stroom uit te schakelen.
De bedieningsinstructies van de machineleverancier raadplegen.

MH8 User’s Guide v
Safety
SW
VARNING
Seupp för plötsliga rörelser.Användarenbörbefinnasigutanför arbetsområdet för sondhuvudet/
förlängningen/sond- kombinationerna.
Hantera och avyttra batterier i enlighet med tillverkarens rekommendationer. Använd endast
de batterier som rekommenderas. Låt ej batteriuttagen komma i kontakt med andra
metallföremål.
För instruktioner angående säker rengöring av Renishaws produkter, se avsnittet
UNDERHÅLL (MAINTENANCE) i produktdokumentationen.
Koppla bort strömmen innan underhåll utförs.
Se maskintillverkarens bruksanvisning.
FIN
VAROITUKSIA
Varo äkillistäliikettä. Käyttäjän tulee pysytellätäysin anturin pään/jatkeen/anturin yhdistelmiä
suojaavan toimivan kotelon ulkopuolella.
Käytäparistoja ja hävitäne valmistajan ohjeiden mukaisesti. Käytäainoastaan suositeltuja
paristoja. Äläanna paristonapojen koskettaa muita metalliesineitä.
Renishaw-tuotteiden turvalliset puhdistusohjeet löytyvät tuoteselosteen HUOLTOA
(MAINTENANCE) koskevasta osasta.
Kytke pois sähköverkosta ennen huoltotoimenpiteitä.
Katso koneen toimittajalle tarkoitettuja käyttöhjeita.

vi MH8 User’s Guide
Safety

MH8 User’s Guide 1-1
Part 1 - English
MH8 User’s Guide

1-2 MH8 User’s Guide
© 2001 Renishaw. All rights reserved.
Renishaw®is a registered trademark of Renishaw plc.
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 written prior 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.
Care of equipment
Your Renishaw probe and accessories are precision instruments. Please use and maintain the
products in accordance with these instructions and retain the transit box for storing the
components when not in use.
Changes to specification
Renishaw plc may modify or change its products or specifications without notice and without
obligation.
Warranty
Renishaw plc warrants its products provided they are installed as defined in the associated
Renishaw documentation.
Consent must be obtained from Renishaw plc if non-Renishaw equipment (such as interfaces
or cabling) is to be used or substituted.Failure to do this may invalidate the Renishaw warranty.
Patents
Aspects of the MH8 indexable probe and aspects of similar systems are the subjects of the
following patents and patent applications.
EP 0392660 JP 149598/91
JP 1735296
JP 293602/1990
US 41685876
US 4313263
US 4571847
US 5088337
English

MH8 User’s Guide 1-3
Contents
Introduction .................................................................................... 1-4
Product description....................................................................... 1-4
Part number summary .............................................................. 1-7
Installation procedure ................................................................... 1-8
Mounting the shank to the probe head..................................... 1-8
Mounting the head on the CMM ............................................... 1-8
Electrical connection ................................................................. 1-9
Mounting the probe to the probe head ..................................... 1-9
Extension bars ........................................................................ 1-10
Head operation ............................................................................ 1-11
Dimensions .................................................................................. 1-13
Technical specification ............................................................... 1-14
Measuring performance .......................................................... 1-14
Technical data ......................................................................... 1-14
Maintenance ................................................................................. 1-15
Fault finding ................................................................................. 1-16
Table of contents

1-4 MH8 User’s Guide
Introduction
The MH8 is a manually operated, indexable probe head that
articulates to provide orientation of the probing axes.The head can
carry probes fitted with a Renishaw M8 connector.The TP20 andTP6
touch trigger probes are recommended.The MH8 is available with a
range of shanks to suit the mounting arrangement specified for the
ram of the CMM, by the manufacturer.
Product description
The MH8 has 2 swivel axes.The probe connector is carried on the A
axis swivel which can rotate the probe through 90°in the Z plane.The
B axis can rotate the probe through ±180°in the X-Y plane.
A lever actuated mechanism locks both axes in the desired position
for gauging the workpiece.The axes are unlocked to allow free
rotation to another position.The locked positions are set at angular
increments of 15°in each axis, providing a total of 168 positions.
When the head orientation is locked, the probe is fully kinematically
constrained in a highly repeatable spatial position.This means that
after initial qualification of the stylus tip, in the positions required for
gauging the workpiece, the probe may be reorientated to any of the
qualified positions without the need for requalification.
A red LED is provided on the front of the head to indicate probe
status.The LED may be driven by the CMM controller or by a
Renishaw probe interface. It is normal convention for the LED to be
ON to indicate a seated (armed) probe and to be OFF to indicate a
triggered probe.
Electrical connection is via a 5 pin Din connector.
Introduction

MH8 User’s Guide 1-5
Product description
Figure 1 -The MH8 indexable head (front)
Shank
Lock lever
Probe status
LED
B axis
scale
A axis
scale
M8 probe
connector
Probe
Stylus

1-6 MH8 User’s Guide
Product description
Figure 2 -The MH8 indexable head (back)
Serial number
label
5 pin DIN
connector

MH8 User’s Guide 1-7
Product description
Part number summary
MH8 probe head A-1332-0013
Contents: MH8 probe head
MH8 User’s Guide
MH8 probe head and
TK4 probe tools (no shank) A-1332-0002
MH8 +TK4 + MS1 shank A-1332-0003
MH8 +TK4 + MS2 shank A-1332-0004
MH8 +TK4 + MS4 shank A-1332-0005
MH8 +TK4 + MS5 shank A-1332-0006
MH8 +TK4 + MS7 shank A-1332-0007
MH8 +TK4 + MS9 shank A-1332-0008
MH8 +TK4 + MS10 shank A-1332-0009
MH8 +TK4 + MS13 shank A-1332-0010
MH8 +TK4 + MS15 shank A-1332-0011
MH8 +TK4 + MS17 shank A-1332-0014
MH8 +TK4 + D shank A-1332-0012
Probe tools:-
S1 ‘C’ spanner A-1042-1486
S9 double ended ‘C’ spanner A-1047-3932
S7 stylus tightening tool M-5000-3540
Hexagon key 1,5mm AF (TP2/TP6 adjustment) P-TL03-0150

1-8 MH8 User’s Guide
Installation procedure
Installation procedure
Mounting the shank to the probe head
•Hold the shank in the recess on the top face of the MH8.
•Rotate the shank until 3 screw holes are aligned.
•Fix the shank in place using only the M3 x 5mm screws
(supplied).
•Progressively tighten using the 2.5mm A/F hexagon key
(supplied).
Mounting the head to the CMM
The head will normally be attached to the ram of the CMM using a
standard shank, specified by the CMM manufacturer.
Standard shanks are listed in the section ‘Part number summary’.
Special or customised mounting arrangements are possible. Please
contact your supplier or Renishaw, for details of our custom products
service.
The mounting must be absolutely rigid, as any movement during
normal operation of the head will add errors to the measurement
system.
If the head is replaced or repositioned in the ram, it will be necessary
to requalify all of the head positions in current use.

MH8 User’s Guide 1-9
Installation procedure
Electrical connection
Connection is by means of a 5 pin DIN socket on the side of the head
(see Figure 2).
The pin numbering functions are given in theTable below:
Pin number Designation
1 LED cathode
2Ground
3 LED anode
4 Probe circuit
5 Probe circuit
Mounting the probe to the probe head
If fitting a TP20 probe, mount the probe body to the probe head before
fitting the probe module and stylus.
•Screw the threaded end of the probe into the M8 connector on the
probe head until it is finger tight.
•Fit the S1 ‘C’ spanner (supplied) to the location holes in the probe
body and tighten by hand.
•The recommended tightening torque is 0.3Nm –0.5Nm.
Refer also to the user’s guide of the probe type being used.

1-10 MH8 User’s Guide
Extension bars
Probe reach may be extended by 50mm using a PEL1 extension bar.
Use of the PEL2, PEL3 or PE series extension bars is not
recommended.
Installation procedure
Figure 3 - Using extension bars
PEL1
TP20
TP20 TP6

MH8 User’s Guide 1-11
Head operation
Figure 4 - Locking lever operation
Head operation
Lock lever
B axis
reference mark Lock
Unlock
A axis
reference position
NOTE: Ensure that the lock lever is turned fully clockwise to the
locked position, before taking gauge points.
❑To change the orientation of the probe:- (Refer to Figure 4)
•Unlock the head by turning the lock lever to the fully
anti-clockwise position.
•Grip the body of the probe (avoid touching the stylus) and
rotate the ‘B’ axis until the desired angle indication on the
scale (in increments of 15°) is adjacent to the ‘B’axis
reference mark. Rotate the ‘A’ axis until the desired angle
indication on the scale (in increments of 15°) is at the ‘A’ axis
reference position.
•Lock the head by turning the lock lever to the fully clockwise
position.
B axis
scale
A axis
scale

1-12 MH8 User’s Guide
❑Qualify the stylus tip(s) according to the CMM supplier’s
instructions.
❑Change the orientation of the probe to the next desired position
and qualify the stylus tip(s).
❑Repeat the qualification process for all desired orientations and
stylus tips.
❑Commence gauging, ensuring that the correct qualification data is
recalled for each head position.
Periodic requalification should be performed according to the following
considerations:-
•CMM supplier’s recommendation’s, particularly in respect of
temperature changes.
•At the start of the working day or shift.
•After an accidental collision.
•After changing any measuring system component (except a
pre-qualifiedTP20 module).
•If the initial state is unknown or uncertain.
Head operation