SCHUNK GMC 12 User instructions

Assembly and Operating Manual
Gripper actuator GMC
1 Date printed 23.02.2011
Dear Customer,
Congratulations on choosing a SCHUNK product. By choosing SCHUNK, you have opted for
the highest precision, top quality and best service.
You are going to increase the process reliability of your production and achieve best
machining results –to the customer's complete satisfaction.
SCHUNK products are inspiring.
Our detailed assembly and operation manual will support you.
Do you have further questions? You may contact us at any time –even after purchase. You
can reach us directly at the mentioned addresses in the last chapter of these instructions.
Kindest Regards,
Your SCHUNK GmbH & Co. KG
Precision Workholding Systems
Bahnhofstr. 106 - 134
D-74348 Lauffen/ Neckar
Tel. [phone]
Fax [phone]
[e-mail]
www.schunk.com
Document last updated: 18.02.2008
GRIPPER ACTUATOR
TYPES
GMC 12 TO
GMC 28
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
2 Date printed 23.02.2011
Contents
1SAFETY ..........................................................................................................................................3
1.1 SYMBOL KEY ..............................................................................................................................3
1.2 APPROPRIATE USE......................................................................................................................3
1.3 SAFETY NOTES...........................................................................................................................4
1.4 INDICATIONS TO THE OPERATING MANUAL ......................................................................................4
2WARRANTY....................................................................................................................................5
3SCOPE OF DELIVERY....................................................................................................................5
4TECHNICAL DATA..........................................................................................................................5
5OPERATING AND ENVIRONMENTAL CONDITIONS ....................................................................5
6ASSEMBLY AND INSTALLATION..................................................................................................6
6.1 DESIGN PRECAUTIONS.................................................................................................................6
6.2 COMPRESSED AIR SUPPLY............................................................................................................6
6.3 SPECIAL CONNECTING MEASURES .................................................................................................6
6.4 ASSEMBLY MEASURES .................................................................................................................7
6.5 MEASURES FOR THE INITIAL OPERATION.........................................................................................7
7HANDLING......................................................................................................................................8
7.1 GRIP FORCE SAFETY DEVICE.........................................................................................................8
7.2 ROTARY ADAPTER.......................................................................................................................9
7.3 END POSITION INTERROGATION ....................................................................................................9
7.4 MODULAR DESIGN.....................................................................................................................10
8REPAIRS.......................................................................................................................................11
9RESPONSE TO MALFUNCTIONS................................................................................................11
10 MAINTENANCE AND CARE .........................................................................................................12
11 REPLACEMENT PARTS...............................................................................................................13
12 EC DECLARATION OF INCORPORATION ..................................................................................14
13 CONTACT .....................................................................................................................................15
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
3 Date printed 23.02.2011
1 Safety
1.1 Symbol Key
You will find this symbol wherever hazards for persons or damage to the product
are possible.
This symbol indicates important information on the product or its handling.
1.2 Appropriate Use
The unit must only be used within the scope of its technical data. Appropriate use also
includes compliance with the conditions the manufacturer has specified for commissioning,
assembly, operation, environment and maintenance. Using the unit with disregard to even a
minor specification will be deemed inappropriate use. The manufacturer assumes no liability
for any injury or damage resulting from inappropriate use.
The gripper actuators are manufactured in accordance with the current level of technology and
with recognised safety regulations. During their use, however, there may occur risks to life and
limb of the user or impairment of the portal actuator and other material assets.
The gripper actuators are intended exclusively for the parallel gripping of service loads in any
position that do not react in their manipulation with any risk to persons, property or the
environment.
The maximum permissible service loads and forces are given in our standard catalogue.
Any usage beyond these definitions is inappropriate.
The manufacturer cannot be held liable for loss or damage arising therefrom. The risk is borne
exclusively by the user.
The gripper actuator must only be operated by persons that are
familiar therewith and that have been instructed in the associated hazards. The relevant acci-
dent prevention regulations and the other generally recognised safety and occupational health
regulations must be complied with.
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
4 Date printed 23.02.2011
1.3 Safety Notes
1.
Responsibility for the compatibility of pneumatic equipment lies with the person
who designs the pneumatic system or takes the decision on its specifications.
- Since the products specified herein can be used under various operating
conditions, their compatibility with the appropriate pneumatic system must be
based on specifications and/or tests in order to conform to their require-
ments.
2.
Machines and equipment operated by pneumatic means may only be used by
trained personnel.
- Compressed air can be hazardous if an operator is not familiar with its use.
The assembly, handling or repair of pneumatic systems is to be undertaken
by trained and experienced personnel.
3.
Do not carry out maintenance work on machines and equipment and do not at-
tempt to remove components until it has been confirmed that it is safe to do so.
- Inspection and maintenance of machines and equipment may only be car-
ried out after it has been confirmed that the devices that must be switched
off are in a securely deactivated condition.
- If machine parts must be removed, carry out safety precautions as men-
tioned above. Deactivate the compressed air supply to this machine and
release any remaining compressed air from the system.
- Before machines and equipment are switched on again, take measures to
ensure that cylinder rods etc. are not pushed outwards. Allow compressed
air to enter the system slowly so that counterpressure builds up gradually.
4.
Contact SCHUNK (see chapter 13 page 15) if the product is to be used under one
of the following conditions:
- Conditions and environments that lie outside the stated specifications, or
where the product is to be used outdoors.
- Installation in equipment in conjunction with nuclear power, railways, aero-
space, vehicles, medical equipment, food and drink, leisure equipment,
emergency shutdown circuits, applications in presses or safety equipment.
- Any application that may possibly have negative influences on persons, an-
imals or property and that requires a special safety analysis.
5.
This user manual should always be easily accessible.
1.4 Indications to the operating manual
This user manual describes gripper actuators of series GMC 12, 16, 20 and 28.
All statements in this user manual refer to the types stated above.
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
5 Date printed 23.02.2011
2 Warranty
The warranty period is 24 months or 40 million load cycles after delivery date from the factory,
assuming use in single-shift operation and that the recommended maintenance and lubrication
intervals are respected. Components that come into contact with workpieces, wearing parts,
shock absorbers, stop screws and proximity switches are never included in the warranty.
The warranty covers the replacement or repair of defective parts in the manufacturing plant.
Further claims are hereby excluded. In this context, please also see our General Terms and
Conditions.
3 Scope of Delivery
The scope of delivery comprises
- Gripper actuator GMC, depending on the version ordered
4 Technical Data
Please consult our catalogue for further technical details. The last version is valid in each
case. (in accordance with Chapter 2.3 General Terms and Conditions)
The airborne sound emitted from the unit is <= 70dB(A)
5 Operating and environmental conditions
- Do not use the product in environments comprising corrosive gases, salt water, water
or vapours.
- For use in an atmosphere where water drops, oil, sprays etc, occur take appropriate
countermeasures in order to ensure protection.
- If electronic end switches are to be used, these should not be used in the presence
of strong magnetic fields.
- Please contact SCHUNK (see chapter 13 page 15) if the product is to be used in the
presence of strong magnetic fields.
- Do not use the gripper actuator in an atmosphere in which it could come into contact
with fluids such as oil or water.
- Do not use the gripper actuator in an atmosphere in which it could come into direct
contact with substances such as powder dust, dust, sprays etc.
- Do not use the gripper actuator in an atmosphere in which sources of heat are
present.
- Do not subject the gripper actuator to excessive vibrations and/or shocks.
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
6 Date printed 23.02.2011
6 Assembly and Installation
6.1 Design precautions
- A protective guard is recommended in order to minimise the risk of injury.
- Ensure that loose, fixed and/or connected parts or tightened securely.
- Take account of the possibility that the operating pressure may decrease as a result
of power failures etc.
- Pay attention to the possibility of the failure of power supplies.
- Mount the compressed air supply in such a way as to prevent a gripping action.
- Pay attention to emergency shutdown facilities.
- Pay attention to what will happen after an emergency stop or abnormal stoppage.
Ensure that nobody can be placed at risk or be injured when equipment is restarted.
6.2 Compressed air supply
- Use clean compressed air and insert a filter between the supply and the pneumatic
system.
- Install a water separator in the pneumatic system.
- Use the product only within the range specified for the medium temperature and am-
bient temperature.
Air specification
- dry (free from condensation)
- filtered to 10 microns
- oiled or oil-free
6.3 Special connecting measures
- Use connecting pipes of a cross-section that is larger than or identical to that of the
connector thread.
- Blow air through the connecting pipes before fitting the devices in order to remove
any dust, contaminant or particles.
- Avoid the ingress of sealing material into the pipe network.
- Do not remove pneumatic components from their packaging until shortly before
fitting.
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
7 Date printed 23.02.2011
6.4 Assembly measures
- During the mounting of the gripper actuator or gripper jaws on the gripper actuator,
do not allow the system to be subjected to impermissible forces or moments.
- The flatness of the mounting surfaces must be less than 0.02mm.
- Select the correct means of connection with a load that has its own guidance
mechanism and ensure that this is adequately aligned.
- Avoid contact with the gripper actuator during operation.
- Select a suitable screw tightening torque for mounting of the gripper actuator or loads
on the gripper actuator in accordance with the generally valid guidelines for screw
connections.
6.5 Measures for the initial operation
Please read this user manual carefully. Knowledge of this user manual is essential in
order to prevent errors and ensure problem-free operation.
Under no circumstances may gripper actuators be operated with oiled air if they
are subsequently to be operated with oil-free air.
- Check the technical specifications.
- Do not use the device until you have checked that it functions correctly taking
account of all permissible operating parameters.
- Regulate the operating speed of the cylinder by means of throttle type non-return
valves. Increase from the low speed to higher speeds until the required operating
speed is reached.
Selection and dimensioning
- Do not subject the units to loads that exceed the limits of their operating range. If
excessive loads are applied , the gripper jaw guidance system and closing mechan-
ism could suffer damage or inaccuracies. The maximum permissible loads are given
in our standard catalogue.
- Do not allow the system to experience impermissible forces or shocks and do not use
excessively long gripper jaws. The maximum permissible gripper jaw length is given
in our standard catalogue.
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
8 Date printed 23.02.2011
7 Handling
7.1 Grip force safety device
In order to secure the grip force in the event of pressure loss, an additional module can be
fitted without the need for further accessories. The grip force safety device is available for op-
eration in either a clamping or an expanding direction.
- GKS 12 for gripper actuator GMC 12
- GKS 16 for gripper actuator GMC 16
- GKS 20 for gripper actuator GMC 20
- GKS 28 for gripper actuator GMC 28
If a gripper actuator including a grip force safety device as described in our standard catalogue
is ordered, it is supplied with the spring already installed by SCHUNK.
Figure 1: grip force safety device
In order to switch the grip force safety device from clamping to expanding mode, the locking
disc (Pos. 8) is fitted in the upper groove in the rod (Pos. 2).
Legend
GCB –3 jaw gripper set
GMD –rotary adapter
GMA –drive unit
GKS –gripper force safety device
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
9 Date printed 23.02.2011
7.2 Rotary adapter
For stepless rotation of the gripper set GCB-... on the drive unit GMA-..., a rotary adapter
GMD-... is available. This is installed between the gripper set and drive unit.
Ordering numbers:
- GMD 12 for gripper actuator GMC 12
- GMD 16 for gripper actuator GMC 16
- GMD 20 for gripper actuator GMC 20
- GMD 28 for gripper actuator GMC 28
If a gripper actuator including a rotary adapter as described in our complete catalogue is
ordered, it is supplied with the rotary adapter already installed by SCHUNK.
7.3 End position interrogation
Standardised interrogation sets for direct mounting are available for interrogation of
end positions.
- Proximity switch - complete GMNS-...
The scope of delivery includes:
- 1x retaining plate
- 1x proximity switch
- 1x connection cable
Figure 2: position from the proximity switch
After the clamping screw has been loosened, the proximity switch can be set by means of the
retaining element. Interrogation is carried out on the single-piece piston rod of the drive unit.
It is possible to install up to 4 interrogation sets in types GMC 16, GMC 20 and GMC 28
allowing interrogation of 4 gripper jaw positions. Only 2 interrogation sets can be installed in
type GMC 12.
In order to fit the retaining elements, the cover of the drive unit or the grip force
safety device must be removed. This is not necessary for fitting of the proximity
switch.
Proximity switch (GMNS-...)
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
10 Date printed 23.02.2011
7.4 Modular design
Gripper actuators of this series are of a completely modular design. All components are
separate entities in terms of function. It is thus possible, on the basis of a small number of
components, to configure a large number of different gripper actuators and gripper/indexing
actuators. The diagram below shows the complete modular set for configuration of parallel
gripper actuators GMP-... and angled gripper actuators GMW-... as well as 3 jaw gripper
actuators GMC...
Figure 3: modular design
Legend
GCB –3 jaw gripper set
GPB –parallel gripper set
GWB –angled gripper set
GMD –rotary adapter
RM –rotary actuator
RZ –intermediate stop
GMA –drive unit
GKS –gripper force safety device
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
11 Date printed 23.02.2011
8 Repairs
The repair or elimination of defects on our products by the customer may only be car-
ried out with our explicit written agreement. Any failure to adhere to this principle ren-
ders invalid our warranty and liability for any resulting warranty or secondary losses.
Following receipt and examination, all gripper actuators of series GMC can be repaired by
SCHUNK.
9 Response to malfunctions
Malfunctions that are caused by defective components may only be remedied by
replacement of these components.
Defective components may only be replaced by SCHUNK genuine replacement parts.
Malfunction
Cause
Remedy
Gripper actuator
does not
open/close
(1) No compressed air
(2) Incorrect pneumatic
connections
(1) Check compressed air
(2) Check pneumatic elements
End position sig-
nal not present
(1) Initiator incorrectly set in
relation to stop
(2) Initiator defective
(3) Broken cable
(1) Readjust initiator
(2) Replace initiator
(3) Replace initiator cable
Hard gripping of
workpiece
(1) Ventilation valve defective
(2) Stroke speed too high
(1) Change ventilation valve
(2) Set ventilation valve
Gripper cannot
grip part or loses
grip on part
(1) Workpiece mass too high
(2) Gripper jaws too long
(3) Design not optimum
(1) Use larger gripper actuator
(2) Move gripping point further
inwards
(3) Adapt design use physical lock
gripping
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
12 Date printed 23.02.2011
10 Maintenance and Care
Under no circumstances may gripper actuators be operated with oiled air if they
are subsequently to be operated with oil-free air.
- The integral cylinders are lubricated for life and do not require relubrication.
Operation with oiled or oil-free compressed air is permissible without restrictions.
- The complete mechanism is already lubricated. It is not therefore necessary to
lubricate this again before operation.
Lubrication or relubrication of the mechanism with rolling bearing grease is
recommended after approx. 4 million cycles.
- All gripper actuators of series GMC are maintenance-free. In order to achieve the
maximum operating life, this chapter and chapter 6.2 (at page 6) of this user manual
should be observed.
- Apart from normal cleaning of machines, no further maintenance measures are
necessary.
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
13 Date printed 23.02.2011
11 Replacement parts
As standardised wear part sets, seal sets are available. The scope of delivery includes all
seals.
Ordering numbers of the seal sets:
- GMDI 12 (for gripper actuator GMC 12)
- GMDI 16 (for gripper actuator GMC 16)
- GMDI 20 (for gripper actuator GMC 20)
- GMDI 28 (for gripper actuator GMC 28)
In accordance with the section drawing below, all other wear parts and individual parts are
available as single items.
Ordering numbers are as indicated in the following example
- GMA- Part-No. 1 GMA 20-01
- GCB- Part-No. 2 GCB 20-02
Gripper head GCB shown rotated in functional plane.
Figure 4: section drawing GMC 280, 300, 400
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
14 Date printed 23.02.2011
12 EC declaration of incorporation
In terms of the EC Machinery Directive 2006/42/EC, annex II B
Manufacturer/
distributor
SCHUNK GmbH & Co. KG.
Spann- und Greiftechnik
Bahnhofstr. 106 –134
74348 Lauffen/Neckar, Germany
We hereby declare that the following product:
Product designation
3-Finger Centric Gripper, Gripper for small components
Type designation:
GMC 12…GMC 28
ID number:
0313190…0313213
meets the applicable basic requirements of the Directive Machinery (2006/42/EC).
The incomplete machine may not be put into operation until conformity of the machine into which the
incomplete machine is to be installed with the provisions of the Machinery Directive (2006/42/EC) is
confirmed.
Applied harmonized standards, especially:
EN ISO 12100-1
Safety of machines - Basic concepts, general principles for design -- Part 1:
Basic terminology, methodology
EN ISO 12100-2
Safety of machines - Basic concepts, general principles for design -- Part 2:
Technical principles
The manufacturer agrees to forward on demand the special technical documents for the incomplete
machine to state offices.
The special technical documents according to Annex VII, Part B, belonging to the incomplete
machine have been created.
Person responsible for documentation: Mr. Michael Eckert, Tel.: [phone]
Location, date/signature:
Lauffen, Germany,
January 2011
p.p.
Title of the signatory
Director for Development
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
15 Date printed 23.02.2011
13 Contact
GERMANY –HEAD OFFICE
SCHUNK GmbH & Co. KG
Spann- und Greiftechnik
Bahnhofstrasse 106 –134
D-Lauffen/Neckar
Tel. [phone]
Fax [phone]
[e-mail]
www.schunk.com
CANADA
SCHUNK Intec Corp.
190 BritanniaRoad East,
Units 23-24
Mississauga, ON L4Z 1W6
Tel. [phone]
Fax [phone]
[e-mail]
www.ca.schunk.com
DENMARK
SCHUNK Intec A/S
Storhaven 7
7100 Vejle
Tel. [phone]
Fax [phone]
[e-mail]
www.dk.schunk.com
HUNGARY
SCHUNK Intec Kft.
Széchenyi út. 70.
3530 Miskolc
Tel. [phone]
Fax [phone]
[e-mail]
www.hu.schunk.com
AUSTRIA
SCHUNK Intec GmbH
Holzbauernstr. 20
4050 Traun
Tel. [phone]
Fax [phone]
[e-mail]
www.at.schunk.com
CHINA
SCHUNK GmbH & Co.KG
Shanghai
Representative Office
777 Zhao Jia Bang Road
Pine City Hotel, Room 923
Xuhui District
Shanghai 200032
Tel. [phone]
Fax [phone]
[e-mail]
www.cn.schunk.com
FRANCE
SCHUNK Intec SARL
Parc d´Activités des Trois
Noyers 15, Avenue James de
Rothschild
Ferrières-en-Brie
77614 Marne-la-Vallée
Cedex 3
Tel. [phone]
Fax [phone]
[e-mail]
www.fr.schunk.com
INDIA
SCHUNK India Branch Office
# 80 B, Yeswanthpur
Industrial Suburbs,
Bangalore 560 022
Tel. [phone]
Fax [phone]
[e-mail]
www.in.schunk.com
BELGIUM, LUXEMBOURG
SCHUNK Intec N.V./S.A.
Bedrijvencentrum Regio Aalst
Industrielaan 4, Zuid III
9320 Aalst-Erembodegem
Tel. [phone]
Fax [phone]
[e-mail]
www.be.schunk.com
CZECH REPUBLIC
SCHUNK Intec s.r.o.
Ernsta Macha 1
643 00 Brno
Tel. [phone]
Fax [phone]
[e-mail]
www.cz.schunk.com
GREAT BRITAIN, IRELAND
SCHUNK Intec Ltd.
Cromwell Business Centre
10 Howard Way,
Interchange Park
Newport Pagnell MK16 9QS
Tel. [phone]
Fax [phone]
[e-mail]
www.gb.schunk.com
ITALY
SCHUNK Intec S.r.l.
Via Barozzo
22075 Lurate Caccivio (CO)
Tel. [phone]
Fax [phone]
[e-mail]
www.it.schunk.com
www.comoso.com

Assembly and Operating Manual
Gripper actuator GMC
16 Date printed 23.02.2011
JAPAN
SCHUNK Intec K.K.
45-28 3-Chome Sanno
Ohta-Ku Tokyo 143-0023
Tel. [phone]
Fax [phone]
[e-mail]
www.tbk-hand.co.jp
POLAND
SCHUNK Intec Sp.z o.o.
Stara Iwiczna,
ul. Słoneczna 116 A
05-500 Piaseczno
Tel. [phone]
Fax [phone]
[e-mail]
www.pl.schunk.com
SOUTH KOREA
SCHUNK Intec Korea Ltd.
# 907 Joongang
Induspia 2 Bldg.,
144-5 Sangdaewon-dong
Jungwon-gu, Seongnam-si
Kyunggi-do, 462-722
Tel. [phone]
Fax [phone]
[e-mail]
www.kr.schunk.com
SWITZERLAND,
LIECHTENSTEIN
SCHUNK Intec AG
Soodring 19
8134 Adliswil 2
Tel. [phone]
Fax [phone]
[e-mail]
www.ch.schunk.com
MEXICO, VENEZUELA
SCHUNK Intec S.A. de C.V.
Av. Luis Vega y Monroy # 332
Fracc. Plazas de Sol
Santiago de Querétaro,
Qro. 76099
Tel. [phone]
Fax [phone]
[e-mail]
www.mx.schunk.com
PORTUGAL
Sales Representative
Victor Marques
Tel. [phone]
Fax [phone]
Mobil [phone]
[e-mail]
www.pt.schunk.com
SPAIN
SCHUNK Intec S.L.
Foneria, 27
08304 Mataró (Barcelona)
Tel. [phone]
Fax [phone]
[e-mail]
www.es.schunk.com
TURKEY
SCHUNK Intec
Bağlama Sistemleri ve
Otomasyon San. ve Tic. Ltd.
Şti.
Küçükyali Iş Merkezi
Girne Mahallesi
Irmak Sodak, A Blok, No: 9
34852 Maltepe, Istanbul
Tel. [phone]
Fax [phone]
[e-mail]
www.tr.schunk.com
NETHERLANDS
SCHUNK Intec B.V.
Speldenmakerstraat 3d
5232 BH ‘s-Hertogenbosch
Tel. [phone]
Fax [phone]
[e-mail]
www.nl.schunk.com
SLOVAKIA
SCHUNK Intec s.r.o.
Mostná 62
919 01 Nitra
Tel. [phone]
Fax [phone]
[e-mail]
www.sk.schunk.com
SWEDEN
SCHUNK Intec AB
Morabergsvägen 28
152 42 Södertälje
Tel. [phone]
Fax [phone]
[e-mail]
www.se.schunk.com
USA
SCHUNK Intec Inc.
211 Kitty Hawk Drive
Morrisville, NC 27560
Tel. [phone]
Fax [phone]
[e-mail]
www.us.schunk.com
www.comoso.com