SCHUNK GM Series User instructions

Translation of Original operating manual
Assembly and Operating Manual
GM 80 – 201
2-finger parallel gripper

Imprint
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03.00 | GM 80 – 201 | Assembly and Operating Manual | en | 389092
Imprint
Copyright:
This manual is protected by copyright. The author is SCHUNK GmbH & Co. KG. All rights
reserved. Any reproduction, processing, distribution (making available to third parties),
translation or other usage - even excerpts - of the manual is especially prohibited and
requires our written approval.
Technical changes:
We reserve the right to make alterations for the purpose of technical improvement.
Document number: 389092
Version: 03.00|11/02/2019|en
© SCHUNK GmbH & Co. KG
All rights reserved.
Dear Customer,
thank you for trusting our products and our family-owned company, the leading
technology supplier of robots and production machines.
Our team is always available to answer any questions on this product and other solutions.
Ask us questions and challenge us. We will find a solution!
Best regards,
Your SCHUNK team
SCHUNK GmbH & Co. KG
Spann- und Greiftechnik
Bahnhofstr. 106 – 134
D-74348 Lauffen/Neckar
Tel. [phone]
Fax [phone]
[email protected]
schunk.com

Table of contents
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Table of contents
1 General.................................................................................................................... 5
1.1 About this manual ................................................................................................ 5
1.1.1 Presentation of Warning Labels ...............................................................5
1.1.2 Applicable documents ..............................................................................6
1.1.3 Variants.....................................................................................................6
1.2 Warranty .............................................................................................................. 6
1.3 Scope of delivery .................................................................................................. 6
1.4 Accessories ........................................................................................................... 7
1.4.1 Seal kit ......................................................................................................7
1.4.2 Sensors .....................................................................................................7
2 Basic safety notes ................................................................................................... 8
2.1 Intended use......................................................................................................... 8
2.2 Not intended use.................................................................................................. 8
2.3 Constructional changes ........................................................................................ 8
2.4 Spare parts ........................................................................................................... 9
2.5 Gripper fingers ..................................................................................................... 9
2.6 Environmental and operating conditions ............................................................. 9
2.7 Personnel qualification....................................................................................... 10
2.8 Personal protective equipment.......................................................................... 11
2.9 Notes on safe operation ..................................................................................... 11
2.10 Transport ............................................................................................................ 12
2.11 Malfunctions....................................................................................................... 12
2.12 Disposal .............................................................................................................. 12
2.13 Fundamental dangers......................................................................................... 13
2.13.1 Protection during handling and assembly ..............................................13
2.13.2 Protection during commissioning and operation ...................................14
2.13.3 Protection against dangerous movements.............................................14
2.13.4 Protection against electric shock............................................................15
2.14 Notes on particular risks..................................................................................... 15
2.14.1 Variant gripping force maintenance ......................................................17
3 Technical data.........................................................................................................18
4 Assembly ................................................................................................................19
4.1 Mechanical connection ...................................................................................... 19
4.2 Air connection .................................................................................................... 20
4.3 Stroke adjustment of the gripper jaws............................................................... 20
4.4 Maintenance of gripping force unit.................................................................... 21
4.5 End position monitoring ..................................................................................... 21

Table of contents
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5 Start-up ..................................................................................................................22
6 Troubleshooting .....................................................................................................23
6.1 Modul does not move?....................................................................................... 23
6.2 The module does not travel through the entire stroke? ....................................23
6.3 Module opens or closes abruptly? .....................................................................23
6.4 Module opens / does it grip the workpiece hard? ............................................. 23
6.5 Gripping force is dropping .................................................................................. 24
6.6 Is the gripper not able to grip or hold on to the workpiece? ............................. 24
6.7 Module does not achieve the opening and closing times? ...............................24
6.8 End position signal not present? ........................................................................ 24
7 Maintenance ..........................................................................................................25
7.1 Maintenance and lubrication intervals............................................................... 25
7.2 Lubricants/Lubrication points (basic lubrication) .............................................. 25
7.3 Disassembly of the module ............................................................................... 25
7.4 Servicing and assembling the module ................................................................ 26
8 Assembly drawing...................................................................................................27
9 Translation of original declaration of incorporation ................................................28
10 Annex to Declaration of Incorporation....................................................................29

General
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1 General
1.1 About this manual
This manual contains important information for a safe and
appropriate use of the product.
This manual is an integral part of the product and must be kept
accessible for the personnel at all times.
Before starting work, the personnel must have read and
understood this operating manual. Prerequisite for safe working is
the observance of all safety instructions in this manual.
Illustrations in this manual are provided for basic understanding
and may differ from the actual product design.
In addition to these instructions, the documents listed under
Applicable documents [}6] are applicable.
1.1.1 Presentation of Warning Labels
To make risks clear, the following signal words and symbols are
used for safety notes.
DANGER
Danger for persons!
Non-observance will inevitably cause irreversible injury or death.
WARNING
Dangers for persons!
Non-observance can lead to irreversible injury and even death.
CAUTION
Dangers for persons!
Non-observance can cause minor injuries.
NOTICE
Material damage!
Information about avoiding material damage.

General
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1.1.2 Applicable documents
• General terms of business *
• Catalog data sheet of the purchased product *
• Assembly and Operating manuals of the accessories *
The documents marked with an asterisk (*) can be downloaded on
our homepage www.schunk.com.
1.1.3 Variants
This operating manual applies to the following variations:
• GM without gripping force maintenance
• GM with gripping force maintenance O.D. gripping (...-K)
• GM with gripping force maintenance I.D. gripping (...-S)
1.2 Warranty
If the product is used as intended, the warranty is valid for 24
months from the ex-works delivery date under the following
conditions:
• Observe the specified maintenance and lubrication intervals
• Observe the ambient conditions and operating conditions
Parts touching the workpiece and wear parts are not included in
the warranty.
1.3 Scope of delivery
The scope of delivery includes
• 2-finger parallel gripper GM in the version ordered

General
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1.4 Accessories
A wide range of accessories are available for this product
For information regarding which accessory articles can be used
with the corresponding product variants, see catalog data sheet.
1.4.1 Seal kit
Seal kits are available as standardized wearing parts sets. All the
seals are included in their scope of delivery.
ID.-No. of the seal kit
Seal kit for Designation ID number
GM 80/81 GMDI 080 0313448
GM 100/101 GMDI 100 0313450
GM 200/201 GMDI 200 0313452
Contents of the sealing kit, Assembly drawing [}27].
1.4.2 Sensors
Overview of the compatible sensors
Designation Type
Inductive proximity switches NI
Abfrageset GMNS...
• Exact type designation of the compatible sensors see catalog.
• Information on handling sensors is available at schunk.com or
from SCHUNK contact persons.

Basic safety notes
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2 Basic safety notes
2.1 Intended use
The product is designed exclusively for gripping and temporarily
holding workpieces or objects.
• The product may only be used within the scope of its technical
data, Technical data [}18].
• When implementing and operating components in safety-
related parts of the control systems, the basic safety principles
in accordance with DIN EN ISO 13849-2 apply. The proven safety
principles in accordance with DIN EN ISO 13849-2 also apply to
categories 1, 2, 3 and 4.
• The product is intended for installation in a machine/system.
The applicable guidelines must be observed and complied with.
• The product is intended for industrial and industry-oriented use.
• Appropriate use of the product includes compliance with all
instructions in this manual.
2.2 Not intended use
It is not intended use if the product is used, for example, as a
pressing tool, stamping tool, lifting gear, guide for tools, cutting
tool, clamping device or a drilling tool.
• Any utilization that exceeds or differs from the appropriate use
is regarded as misuse.
2.3 Constructional changes
Implementation of structural changes
By conversions, changes, and reworking, e.g. additional threads,
holes, or safety devices can impair the functioning or safety of the
product or damage it.
• Structural changes should only be made with the written
approval of SCHUNK.

Basic safety notes
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2.4 Spare parts
Use of unauthorized spare parts
Using unauthorized spare parts can endanger personnel and
damage the product or cause it to malfunction.
• Use only original spare parts or spares authorized by SCHUNK.
2.5 Gripper fingers
Requirements for the gripper fingers
Stored energy within the product creates the risk of serious
injuries and significant property damage.
• Arrange the gripper fingers in a way that the product reaches
either the position "open" or "closed" in a de-energized state.
• Only exchange the gripper fingers when no residual energy
remains in the product.
• Make sure that the product and the top jaws are a sufficient
size for the application.
2.6 Environmental and operating conditions
Required ambient conditions and operating conditions
Incorrect ambient and operating conditions can make the product
unsafe, leading to the risk of serious injuries, considerable material
damage and/or a significant reduction to the product's life span.
• Make sure that the product and the top jaws are a sufficient
size for the application.
• Observe maintenance and lubrication intervals, Maintenance
and lubrication intervals [}25].
• Make sure that the environment is free from splash water and
vapors as well as from abrasion or processing dust. Exceptions
are products that are designed especially for contaminated
environments.
• Make sure that the product is not exposed to excessive
vibrations and/or strokes.
• Ensure that no strong magnetic fields impair the function of the
product.
Contact your SCHUNK partner if the product is to be used in
strong magnetic fields.

Basic safety notes
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2.7 Personnel qualification
Inadequate qualifications of the personnel
If the personnel working with the product is not sufficiently
qualified, the result may be serious injuries and significant
property damage.
• All work may only be performed by qualified personnel.
• Before working with the product, the personnel must have read
and understood the complete assembly and operating manual.
• Observe the national safety regulations and rules and general
safety instructions.
The following personal qualifications are necessary for the various
activities related to the product:
Trained electrician Due to their technical training, knowledge and experience, trained
electricians are able to work on electrical systems, recognize and
avoid possible dangers and know the relevant standards and
regulations.
Qualified personnel Due to its technical training, knowledge and experience, qualified
personnel is able to perform the delegated tasks, recognize and
avoid possible dangers and knows the relevant standards and
regulations.
Instructed person Instructed persons were instructed by the operator about the
delegated tasks and possible dangers due to improper behaviour.
Service personnel of
the manufacturer
Due to its technical training, knowledge and experience, service
personnel of the manufacturer is able to perform the delegated
tasks and to recognize and avoid possible dangers.

Basic safety notes
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2.8 Personal protective equipment
Use of personal protective equipment
Personal protective equipment serves to protect staff against
danger which may interfere with their health or safety at work.
• When working on and with the product, observe the
occupational health and safety regulations and wear the
required personal protective equipment.
• Observe the valid safety and accident prevention regulations.
• Wear protective gloves to guard against sharp edges and
corners or rough surfaces.
• Wear heat-resistant protective gloves when handling hot
surfaces.
• Wear protective gloves and safety goggles when handling
hazardous substances.
• Wear close-fitting protective clothing and also wear long hair in
a hairnet when dealing with moving components.
2.9 Notes on safe operation
Incorrect handling of the personnel
Incorrect handling and assembly may impair the product's safety
and cause serious injuries and considerable material damage.
• Avoid any manner of working that may interfere with the
function and operational safety of the product.
• Use the product as intended.
• Observe the safety notes and assembly instructions.
• Do not expose the product to any corrosive media. This does
not apply to products that are designed for special
environments.
• Eliminate any malfunction immediately.
• Observe the care and maintenance instructions.
• Observe the current safety, accident prevention and
environmental protection regulations regarding the product's
application field.

Basic safety notes
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2.10 Transport
Handling during transport
Incorrect handling during transport may impair the product's
safety and cause serious injuries and considerable material
damage.
• When handling heavy weights, use lifting equipment to lift the
product and transport it by appropriate means.
• Secure the product against falling during transportation and
handling.
• Stand clear of suspended loads.
2.11 Malfunctions
Behavior in case of malfunctions
• Immediately remove the product from operation and report the
malfunction to the responsible departments/persons.
• Order appropriately trained personnel to rectify the
malfunction.
• Do not recommission the product until the malfunction has
been rectified.
• Test the product after a malfunction to establish whether it still
functions properly and no increased risks have arisen.
2.12 Disposal
Handling of disposal
The incorrect handling of disposal may impair the product's safety
and cause serious injuries as well as considerable material and
environmental harm.
• Follow local regulations on dispatching product components for
recycling or proper disposal.

Basic safety notes
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2.13 Fundamental dangers
General
• Observe safety distances.
• Never deactivate safety devices.
• Before commissioning the product, take appropriate protective
measures to secure the danger zone.
• Disconnect power sources before installation, modification,
maintenance, or calibration. Ensure that no residual energy
remains in the system.
• If the energy supply is connected, do not move any parts by
hand.
• Do not reach into the open mechanism or movement area of
the product during operation.
2.13.1 Protection during handling and assembly
Incorrect handling and assembly
Incorrect handling and assembly may impair the product's safety
and cause serious injuries and considerable material damage.
• Have all work carried out by appropriately qualified personnel.
• For all work, secure the product against accidental operation.
• Observe the relevant accident prevention rules.
• Use suitable assembly and transport equipment and take
precautions to prevent jamming and crushing.
Incorrect lifting of loads
Falling loads may cause serious injuries and even death.
• Stand clear of suspended loads and do not step into their
swiveling range.
• Never move loads without supervision.
• Do not leave suspended loads unattended.

Basic safety notes
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2.13.2 Protection during commissioning and operation
Falling or violently ejected components
Falling and violently ejected components can cause serious injuries
and even death.
• Take appropriate protective measures to secure the danger
zone.
• Never step into the danger zone during operation.
2.13.3 Protection against dangerous movements
Unexpected movements
Residual energy in the system may cause serious injuries while
working with the product.
• Switch off the energy supply, ensure that no residual energy
remains and secure against inadvertent reactivation.
• Never rely solely on the response of the monitoring function to
avert danger. Until the installed monitors become effective, it
must be assumed that the drive movement is faulty, with its
action being dependent on the control unit and the current
operating condition of the drive. Perform maintenance work,
modifications, and attachments outside the danger zone
defined by the movement range.
• To avoid accidents and/or material damage, human access to
the movement range of the machine must be restricted. Limit/
prevent accidental access for people in this area due through
technical safety measures. The protective cover and protective
fence must be rigid enough to withstand the maximum possible
movement energy. EMERGENCY STOP switches must be easily
and quickly accessible. Before starting up the machine or
automated system, check that the EMERGENCY STOP system is
working. Prevent operation of the machine if this protective
equipment does not function correctly.

Basic safety notes
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2.13.4 Protection against electric shock
Possible electrostatic energy
Components or assembly groups may become electrostatically
charged. When the electrostatic charge is touched, the discharge
may trigger a shock reaction leading to injuries.
• The operator must ensure that all components and assembly
groups are included in the local potential equalisation in
accordance with the applicable regulations.
• While paying attention to the actual conditions of the working
environment, the potential equalisation must be implemented
by a specialist electrician according to the applicable
regulations.
• The effectiveness of the potential equalisation must be verified
by executing regular safety measurements.
2.14 Notes on particular risks
Generally valid:
• Remove the energy supplies before installation, modification,
maintenance, or adjustment work.
• Make sure that no residual energy remains in the system.
• Do not move parts by hand when the energy supply is
connected.
• Do not reach into the open mechanism or the movement area
of the module.
• Perform maintenance, modifications, and additions outside of
the danger zone.
• For all work, secure the unit against accidental operation.
• Take a precautionary approach by maintenance and
disassembly.
• Only specially trained staff should disassemble the module.
CAUTION
Possible risk of injury due to electrostatic energy!
Components or assembly groups may become electrostatically
charged. When touched, the electrostatic discharge can trigger a
startle response, which can result in injuries.
•The operator must ensure that all components and assembly
groups are included in the local equipotential bonding in line
with the applicable regulations.

Basic safety notes
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NOTE
• The equipotential bonding must be installed by a specialist
electrician in line with the applicable regulations, paying
particular attention to the actual conditions in the working
environment.
• The effectiveness of the equipotential bonding must be verified
by a specialist electrician through regular safety measurements.
WARNING
Risk of injury from crushing and impacts!
Serious injury could occur during the base jaw procedure and
when breaking or loosening the gripper fingers.
•Wear suitable protective equipment.
•Do not reach into the open mechanism or the movement area
of the product.
WARNING
Risk of injury from objects falling and being ejected!
Falling and ejected objects during operation can lead to serious
injury or death.
•Take appropriate protective measures to secure the danger
zone.
WARNING
Risk of injury from unexpected movements!
If the energy supply is switched on or residual energy remains in
the system, parts may move unexpectedly and cause serious
injuries.
•Switch off the energy supply.
•Make sure no residual energy is in the system.

Basic safety notes
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2.14.1 Variant gripping force maintenance
WARNING
Risk of injury from objects falling during energy supply failure
Products with a mechanical gripping force maintenance can,
during energy supply failure, still move independently in the
direction specified by the mechanical gripping force
maintenance.
•Secure the end positions of the product with SCHUNK SDV-P
pressure maintenance valves.
WARNING
Risk of injury due to uncontrolled movements!
While disassembling uncontrolled movements of the gripper's in-
dividual parts of grippers with gripping force maintenance may
cause serious injuries.
•Switch off the energy supply.
•Ensure there is no residual energy in the system.
•Disassemble the gripper carefully.
WARNING
Modules with a mechanical gripping force maintenance can,
during energy supply failure, still move independently in the
direction specified by the mechanical gripping force
maintenance.

Technical data
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3 Technical data
Module type GM ... GM ... K / S
Ambient temperature [°C] 5 - 60
IP rating 40
Noise emission [dB(A)] ≤ 70
Pressure medium Compressed air, compressed air quality according to
ISO 8573-1:7 4 4
Min. pressure [bar] 3 4.5
Max. pressure [bar] 8
Nominal working pressure [bar] 6
Size 80/81 100/101 200/201
Max. permissible finger length
[mm]
40 70 100
Max. permitted weight per finger
[kg]
0.07 0.2 0.55
More technical data is included in the catalog data sheet.
Whichever is the latest version.

Assembly
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4 Assembly
4.1 Mechanical connection
Evenness of the
mounting surface
The values apply to the whole mounting surface to which the
product is mounted.
Requirements for evenness of the mounting surface (Dimensions in mm)
Edge length Permissible unevenness
< 100 < 0.02
> 100 < 0.05
The connection geometries are above, below and at the side of the
gripping module.
Dimensions for the position and size of the connection geometries,
Catalog data sheet of the product .
Mounting ØMount the module using the fixing bores provided.
ØMount the modules using the fixing bores provided.
ØAttach the top jaws using the mounting bores provided.
NOTICE
Material damage due to improper assembly!
•When mounting loads, do not allow impermissible forces and
moments to be exerted (see catalog data sheet).
•Select a suitable tightening torque when assembling the
product or loads on the product in accordance with the
generally accepted guidelines for screw connections.
•Secure all screws using a suitable chemical screw lock.

Assembly
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4.2 Air connection
NOTICE
Damage to the gripper is possible!
If the maximum permissible finger weight or the permissible
mass moment of inertia of the fingers is exceeded, the gripper
can be damaged.
•A jaw movement always has to be without jerks and bounce.
•You must therefore implement sufficient reduction and/or
damping.
•Observe the diagrams and information in the catalog data
sheet.
NOTICE
Pressure medium:
The unit must not under any circumstances be operated with
oiled air before operation with unoiled air (washing out of factory
lubrication).
4.3 Stroke adjustment of the gripper jaws
For stroke adjustment of the gripper jaws, the parts listed below
are included in the scope of delivery of every gripping module.
• Stroke adjustment screw (28)
• Counter nut (29)
Stroke adjustment of the gripper jaws
ØRelease counter nut (29).
ØBy turning the stroke adjustment screw (28), the stroke of the
curve slide (7), and therefore the gripper jaw stroke can be set
from 0 up to maximum stroke.
The stroke setting can be made in both the clamping and the
spreading direction.