Renishaw ACR2 Installation guide

Brand: Renishaw

Model: ACR2

Type: Installation guide

Renishaw ACR2

The Renishaw ACR2 is an autochange system for the PHS1 servo positioning head system. It allows for automatic changing of probes and extensions, increasing the versatility and efficiency of your measurement process. With the ACR2, you can quickly and easily switch between different probes and extensions to perform a variety of measurement tasks, without the need for manual intervention.

Renishaw ACR2

H-1000-4045-01-B

ACR2

Autochange system for

PHS1 servo positioning head system

Installation Guide

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Renishaw plc, New Mills, Wotton-under-Edge, Gloucestershire GL12 8JR, United Kingdom

International Tel +44 1453 524524 Fax +44 1453 524901

National Tel 01453 524524 [07000 RENISHAW] Fax 01453 524901 Telex 437120 RENMET G

email [email protected] Internet http://www.renishaw.com

Renishaw Latino Americana Ltda.,

Calçada dos Crisântemos 22,

C.C. Alphaville,

C.e.p. 06453-000 Barueri SP,

Brazil

Tel +55 11 7295 2866

Fax +55 11 7295 1641

Renishaw S.A.,

15 rue Albert Einstein,

Champs sur Marne,

77437 Marne la Vallée,

Cedex 2,

France

Tel +33 1 64 61 84 84

Fax +33 1 64 61 65 26

Renishaw S.p.A.,

Via dei Prati 5,

10044 Pianezza,

Torino,

Italy

Tel +39 011 9 66 10 52

Fax +39 011 9 66 40 83

Renishaw A.G.,

Poststrasse 5,

CH 8808 Pfäffikon,

Switzerland

Tel +41 55 410 66 66

Fax +41 55 410 66 69

Renishaw Inc,

623 Cooper Court,

Schaumburg,

Illinois 60173,

USA

Tel +1 847 843 3666

Fax +1 847 843 1744

Renishaw (Hong Kong) Ltd.,

Unit 4A,

3/F, New Bright Building,

11 Sheung Yuet Road,

Kowloon Bay,

Hong Kong

The People's Republic of China

Tel +852 2753 0638

Fax +852 2756 8786

Renishaw GmbH,

Karl-Benz Strasse 12,

72124 Pliezhausen,

Germany

Tel +49 7127 9810

Fax +49 7127 88237

Renishaw KK,

Across City Nakano-Sakaue,

38-1 Chuo 1-chome,

Nakano-ku,

Tokyo 164-0011,

Japan

Tel +81 3 5332 6021

Fax +81 3 5332 6025

Renishaw Iberica S.A.

Edificio Océano,

Calle Garrotxa 10-12,

Parque Más Blau,

08820 Prat de Llobregat,

Barcelona,

Spain

Tel +34 93 478 21 31

Fax +34 93 478 16 08

Renishaw's Representative Offices

The People's Republic of China

Beijing Tel +86 10 641 07993

Fax +86 10 641 07992

Indonesia Tel +62 21 428 70153

Jakarta Fax +62 21 424 3934

Singapore Tel +65 438 2779

Fax +65 438 2780

Australia Tel +61 3 9553 8267

Fax +61 3 9592 6738

Renishaw's Liaison Offices

India Tel +91 80 509 5419

Bangalore Fax +91 80 509 5421

South Korea Tel +82 2 565 6878

Fax +82 2 565 6879

CONTENTS

2 Manual No. H-1000-4045

The copyright in this document is vested in Renishaw plc. The document must not be

reproduced in whole or in part, or used in tendering or manufacturing purposes, except with

consent of Renishaw plc and then only on the conditions that this notice is included in any such

reproduction.

Information contained within this document is believed to be accurate at the time of publication

but no liability whatsoever can be accepted by Renishaw plc arising out of any use made of this

information.

Unless otherwise expressly stated neither this document nor any information contained in shall

be deemed to constitute or form any part of an invitation to treat or offer contract for the

product(s) described in this document.

Renishaw reserves the right to change specifications or any information contained in this

document without notice.

Renishaw® is a registered trademark of Renishaw plc.

Manual No: H-1000-4045-01-B

First issued – August 1999

Revised – February 2000

CONDITIONS

Care of probing system

Renishaw probing systems are precision tools used to obtain precise measurements and should

therefore be treated with care.

Changes to equipment

Renishaw reserves the right to change specifications without notice.

Renishaw reserves the right to improve, change or modify its hardware or software without

incurring any obligations to make changes to Renishaw equipment previously supplied.

Warranty

Renishaw plc warrants its equipment provided that it is installed exactly as defined in associated

Renishaw documentation.

Consent must be obtained from Renishaw if non-Renishaw equipment (eg interfaces and/or

cabling) is to be used or substituted. Failure to comply with this will invalidate the Renishaw

warranty.

Claims made under warranty must be made from authorised service centres only, which may be

advised by the supplier or distributor.

Patents

Features of the various products shown in this Installation Guide and features of similar products

are the subject of the following patents and patent applications:

EP 0142373 EP 0293036

JP 2098080 US 4651405

EP 0816014 EP 0836377

JP 12,662/1998

SAFETY

Manual No. H-1000-4045 3

FCC (USA)

Information to user (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 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 own 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.

SAFETY

4 Manual No. H-1000-4045

GB WARNINGS

SAFETY NOTE

Each ACR2 port contains spring-loaded components which cause pinch

hazards if covers are removed.

Do not dismantle ACR2 ports or remove them from their mounting plates.

Return defective units to an authorised Renishaw Customer Service Centre.

Pinch hazards exist between moving parts and between moving and static

parts. Do not hold any part of the Autochange system during movements or

during automatic 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.

There are no user serviceable parts inside Renishaw ACR2 units. Return

defective units to an authorised Renishaw Customer Service Centre.

For instructions regarding the safe cleaning of Renishaw products, refer to

the MAINTENANCE section of the relevant product documentation.

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.

The expected method of providing an emergency stop for Renishaw products

is to remove power.

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SAFETY

Manual No. H-1000-4045 15

Environmental Requirements

The following environmental conditions comply with (or exceed) BS EN 61010-1:1993

Indoor use IP30 (no protection against water)

Altitude Up to 2000m

Operating temperature +10°C to +40°C

Storage temperature -10°C to +70°C

Relative humidity 80% maximum for temperatures up to +31°C

Linear decrease to 50% at +40°C

Transient overvoltages Installation category II

Pollution degree 1

Spécifications relatives à l'environnement

Les conditions d'environnement sont en accord avec la norme BS EN 61010-1:1993 ou ultérieure.

Utilisation uniquement à l'intérieur IP30 (aucune protection contre l'eau)

Altitude Jusqu'à 2000m

Température de fonctionnement +10°C à +40°C

Température de stockage -10°C à +70°C

Humidité relative 80% maximum pour des températures jusqu'à +31°C

avec diminution linéaire jusqu'à 50% à +40°C

Surtensions transitoires Installation classée en 2ème catégorie

Degré de pollution 1

Umgebungsbedingungen

Die Forderungen der Richtlinie BS EN 61010-1:1993 sind erfüllt

Inneneinsatz IP30 (kein Schutz gegen Wasser)

Höhe bis zu 2000m

Betriebstemperatur +10°C bis +40°C

Lagertemperatur -10°C bis +70°C

Relative Luftfeuchtigkeit maximal 80% für Temperaturen bis +31°C,

linearer Anstieg bis 50% bei +40°C

Kurzzeitige Überspannungen Installationsklasse II

Verschmutzungsgrad 1

Specifiche ambientali operative

Le seguenti specifiche ambientali di lavoro sono conformi, o eccedono, la norma BS EN 61010-1:1993

Uso interno IP30 (senza protezione contro l'acqua)

Altitudine Fino a 2000m

Temperatura di lavoro da +10°C a +40°C

Temperatura di immagazzinamento da –10°C a +70°C

Umidità relativa Massimo 80% per temperatura fina a +31°C

riduzione lineare al 50% a +40°C

Sovraccarichi di tensione (transienti) Categoria d'installazione II

Grado di inquinamento 1

CONTENTS

16 Manual No. H-1000-4045

CONTENTS PAGE

1 INTRODUCTION .....................................................................................................17

1.1 System features .......................................................................................17

1.2 System description ...................................................................................18

2 INSTALLATION.......................................................................................................20

2.1 Port pair mounting....................................................................................20

2.2 Port pair alignment ...................................................................................22

2.3 Port pair alignment checking procedure...................................................23

2.4 Rack reference.........................................................................................23

3 MANUAL OPERATION ...........................................................................................24

4 AUTOMATIC OPERATION.....................................................................................26

4.1 Port datum procedure...............................................................................26

4.2 Change cycles..........................................................................................31

Associated publications

H-1000-4044 PHS1 Installation Guide

H-1000-6005 PHS1 Programmer's Guide

H-1000-4048 PHS1 Calibration Guide

INTRODUCTION

Manual No. H-1000-4045 17

1 INTRODUCTION

The ACR2 autochange system is an arm-changing system for the PHS1

servo positioning head system. It allows probe extensions or probe adapter

arms to be exchanged to suit the probing task required.

Arms are locked or unlocked from the head by motion of the machine itself.

The head engages a rack port and the machine drives the port up to unlock

an arm or down to lock it in position.

No power connections or signal connectors are necessary to the rack,

making installation very simple.

The ACR2 is supplied as pairs of rack ports which are mounted onto a

suitable fixture supplied by the OEM. The system is modular and any number

of port pairs can be used anywhere on the CMM.

1.1 System features

 Modular construction Ports can be positioned in pairs anywhere on

the machine

 Simple concept The change cycle is operated by CMM motion

No power connections are needed and all

sensing and overtravel protection is contained

within the PHS1 servo positioning head itself;

no motors, switches or sensors within the rack

 Expandable concept Any number of racks can be fitted anywhere on

the machine, eg a 4 port rack at one end and a

2 port rack at the other

 Versatile probing ACR2 ports can accommodate touch trigger,

analogue contact or laser scanning probes, with

or without extension bars

 Safe operation Sensors on the PHS1 servo positioning head

detect collisions and check whether arms are

correctly and safely locked in position after a

change cycle. The PHS1 also incorporates an

overtravel mechanism to protect against

collisions

 Sealed arm locations Covers with effective seals protect electrical

contacts and kinematic locations when not in

use

INTRODUCTION

18 Manual No. H-1000-4045

1.2 System description

The ACR2 rack consists of pairs of ports that store arms. The arms are

either head adapters (HA) or head extensions (HE).

The ports allow arms stored in them to be automatically locked and unlocked

onto a PHS1 servo positioning head.

To change probe arms automatically, the CMM must be programmed to

complete a series of movements using positions calculated during the port

datum routine. These movements cause a mechanism inside the port to

rotate a screwdriver which engages a slot on the arm. The slot activates a

cam which, when rotated, locks the arm in place.

Manual fitment of probe arms can be achieved using the S10 autojoint key

supplied.

Arms are located in the rack port on two steel pins which pass through holes

in the arm. A spring-loaded lid secures the arm in position and seals the

spring-loaded electrical contacts and kinematic locations against

contamination.

Signals to indicate when an arm is present on the head and whether the arm

is locked correctly and safely are provided by the servo positioning head.

This ensures that arms are always positively locked on the head.

Crash protection is provided by the head overtravel unit. Any machine move

errors or mis-programmed moves which cause an unexpected collision will

cause the head overtravel to operate, sending a signal to stop the machine.

NOTE

The maximum operating speed of the ACR2 autochange rack should not

exceed 100mm/sec.

INTRODUCTION

Manual No. H-1000-4045 19

Figure 1 – 6 port ACR2 autochange system

INSTALLATION

20 Manual No. H-1000-4045

2 INSTALLATION

2.1 Port pair mounting

The ACR2 autochange system is a modular system with pairs of ports

supplied by Renishaw to be mounted on a suitable fixture. In this way, any

number of racks of two, four, six or more ports can be created and positioned

anywhere on the CMM.

NOTE

Renishaw do not supply the mounting pillar.

Each port pair can be mounted using four off M8 bolts supplied with the kit

or, if a proprietary extrusion is used, M8 T-slot nuts. Mounting hole positions

for M8 bolt mounting are shown in Figure 2.

INSTALLATION

Manual No. H-1000-4045 21

Figure 2 - Port

pair mounting

132.5

ADJUSTMENT HOLES

M8 X 1.25 THROUGH (2 POSITIONS)

MOUNTING HOLES

∅ 9MM THROUGH (4 POSITIONS)

12.7

305

100

299

INSTALLATION

22 Manual No. H-1000-4045

2.2 Port pair alignment

1. Mount a pair of ports to the mounting fixture using four off M8 bolts

through the mounting holes shown in Figure 2.

2. Align the port mounting plate, with the use of shims if necessary, such

that the front face is aligned to the machine axes within ±0.1° (0.5mm

runout) and the runout on the top face is within 0.5mm.

Two off M8 screws (supplied in the port pair kit) can be used in the

adjustment holes (see Figure 2) to assist in aligning the port pair.

Figure 3 – Port pair alignment

FACE B : ALIGN TO WITHIN 0.5MM

FRONT FACE

ALIGN TO

WITHIN ±0.1°

ALIGN FRONT FACE

TO WITHIN 0.5MM

THIS DIRECTION

ALIGN FRONT FACE TO WITHIN 0.5MM THIS DIRECTION

INSTALLATION

Manual No. H-1000-4045 23

2.3 Port pair alignment checking procedure

In order to check the alignment of a port pair, the following procedure should

be used:

 Place the tool onto the alignment pins, as shown in Figure 4, ensuring

the alignment pins are seated in the levelling tool vee grooves.

 If the port is correctly aligned, the bubble should be central within the

graticule.

Figure 4 – Placing the alignment tool onto the ACR2 port

NOTE

If the alignment is found to be incorrect, procedure 2.2 (port pair alignment)

should be repeated.

2.4 Rack reference

It may be useful to add a reference sphere to the rack pillar. The reference

sphere can be used as a master reference for the position of the rack pillar

relative to the zero reference position of the machine.

Bubble

level

Alignment tool

MANUAL OPERATION

24 Manual No. H-1000-4045

3 MANUAL OPERATION

Figure 5 – Probe arm locking mechanism

Refer to section 4 for information on automatic probe exchange.

To change a probe manually :

NOTE

It is advised that no measurements should be made after a manual probe

change. It is suggested that the probe should be unloaded and loaded in the

autochange rack before use.

1. With the use of the autojoint key, ensure that the cam slot which

operates the locking mechanism is in the unlocked ‘1 o’clock’ position -

see Figure 6

2. Place the probe arm in position, ensuring that the central pin on the head

is aligned with the mating hole on the probe arm

3. The alignment pin in the probe arm will engage and align the kinematic

locations - see Figure 5

4. Once aligned, turn the key to its locked ‘5 o’clock’ position - see Figure 6

5. Once aligned, insert the S10 autojoint key into the cam slot and turn fully

clockwise to the cam end stop. Then back the cam off by approximately

5° to ensure correct docking with the ACR2 port mechanism.

D axis

E axis

Arm probe

Locking pin

Spring-loaded contact pins

Mating hole

MANUAL OPERATION

Manual No. H-1000-4045 25

NOTE

If a probe adapter or extension is manually locked, it is important that the

cam is fully locked and then backed off by approximately 5°, or the probe

arm may not dock correctly in the ACR2 port.

Figure 6 – Cam positions

D axis

Arm probe

E axis

Unlocked position

Locked position

AUTOMATIC OPERATION

26 Manual No. H-1000-4045

4 AUTOMATIC OPERATION

This section gives a suggested method for datuming an ACR2 autochange

rack port and the recommended CMM movements for change cycles using

that datum position.

4.1 Port datum procedure

This method allows datuming of each ACR2 port by taking probing points on

one of the location pins.

1. Qualify the PHS and probe combination as shown below

Note that the probe tip must be qualified before the port can be

datumed. Refer to the PHS Calibration Guide H-1000-4048 for

recommended probe calibration procedure.

A typical probe assembly suitable for port datuming would be

 HA8 probe arm

 TP2 probe

 PS17R 20mm stylus

Nominal offset values for this probe assembly are

 RD 72mm

 RE 104mm

The values RD and RE should be established to within ±0.1mm by the

probe qualification procedure.

Note also the angular orientation of the D and E axes required for port

datuming (D 0°, E 0°). The probe tip should be aligned to the axis

origins to within 0.1°.

AUTOMATIC OPERATION

Manual No. H-1000-4045 27

Figure 7 - ACR2 port datum procedure

2. Position the ACR2 port in the lower latched position (Figure 8).

NOTE

To manually move between upper and lower positions, the two port pins

must be pushed to the left to disengage the motion locks.

3. Lift the lid retaining clip up to hold the latch in the open position (Figure

9).

D axis C/L

PHS D/E axis origin

E axis C/L

Typical probe assembly

for port datum procedure

±0.1°

NOTE: Angular orientation of D and E axes

required for port datum procedure (D and E 0°)

AUTOMATIC OPERATION

28 Manual No. H-1000-4045

Figure 8 – Port in lower latch position

Figure 9 – Lifting the latch retaining clip

Lift lid retaining clip

AUTOMATIC OPERATION

Manual No. H-1000-4045 29

Figure 10 – ACR2 port datuming procedure

NOTE

Only one port is shown for clarity.

4. Take four points around the full diameter of the upper location pin in

the ZX plane (assuming the rack is oriented to the CMM axes as

shown on this page).

5. Use the four points to create a circle.

6. Use the centre point of the circle as the coordinates for the pin datum

in the X and Z axes, X

and Z

7. Take one point on the end of the upper location pin in the Y axis and

use it as the coordinate for the pin datum in the Y axis, Y

Ensure port is in its lower position

Upper location pin

AUTOMATIC OPERATION

30 Manual No. H-1000-4045

8. Push the lid forward to release the retaining clip.

Figure 11 – Pin datum position

9. Offset the position X

, Y

, Z

to the PHS D/E axis origin as shown

below. Use this point X

, Y

, Z

as the pin datum point.

= X

– R

= Y

+ R

= Z

Pin datum point (X

, Y

, Z

)

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Renishaw ACR2 Installation guide

Brand: Renishaw

Model: ACR2

Type: Installation guide

Renishaw ACR2

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Renishaw ACR2 Installation guide

Renishaw ACR2 Installation guide

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