SCHUNK LGP 08 - 40 User instructions

Translation of the original manual
2-Finger-parallel gripper
LGP 08 - 40
Assembly and Operating Manual
Superior Clamping and Gripping

Translation of the original manual
Imprint:
Copyright:
This manual remains the copyrighted property of SCHUNK GmbH & Co. KG. It is solely
supplied to our customers and operators of our products and forms part of the unit. This
documentation may not be duplicated or made accessible to third parties, in particular
competitive companies, without our prior permission.
Technical changes:
We reserve the right to make alterations for the purpose of technical improvement.
Document number: 0389186
Edition: 03.01 |07/02/2013|en
© SCHUNK GmbH & Co. KG, Lauffen/Neckar
All rights reserved
Dear customer,
congratulation 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.
Kindest Regards
Yours SCHUNK GmbH & Co. KG
Precision Workholding Systems
Bahnhofstr. 106 – 134
D-74348 Lauffen/Neckar
Tel. [phone]
Fax [phone]
[email protected]
www.schunk.com
03.01|LGP 08 - 40|en

Table of contents
03.01|LGP 08 - 40|en
3
Table of contents
1 About this manual .................................................................................................... 5
1.1 Warnings................................................................................................................... 5
1.1.1 Signal words .................................................................................................. 5
1.1.2 Symbole......................................................................................................... 5
1.2 Variants..................................................................................................................... 6
1.3 Applicable documents .............................................................................................. 6
2 Basic safety notes .................................................................................................... 7
2.1 Intended use............................................................................................................. 7
2.2 Not intended use ...................................................................................................... 7
2.3 Environmental and operating conditions................................................................. 7
2.4 Product safety........................................................................................................... 8
2.4.1 Protective equipment ................................................................................... 8
2.4.2 Demands on the top jaws ............................................................................. 8
2.4.3 Constructional changes, attachments, or modifications.............................. 8
2.5 Personnel qualification............................................................................................. 8
2.6 Using personal protective equipment...................................................................... 9
2.7 Notes on particular risks........................................................................................... 9
2.7.1 Variant gripping force maintenance .......................................................... 10
3 Warranty................................................................................................................. 11
4 Scope of delivery ..................................................................................................... 11
5 Accessories.............................................................................................................. 11
5.1 Sensors.................................................................................................................... 11
6 Technical data ......................................................................................................... 12
7 Assembly................................................................................................................. 13
7.1 Mechanical connection .......................................................................................... 13
7.2 Air connection ........................................................................................................ 14
7.3 Sensors.................................................................................................................... 15
7.3.1 Programmable magnetic switch (MMS-P).................................................. 15
8 Troubleshooting ...................................................................................................... 20
8.1 Modul does not move? .......................................................................................... 20
8.2 The module does not travel through the entire stroke? ....................................... 20
8.3 Module opens or closes abruptly? ......................................................................... 20
8.4 Magnetic switch does not work? ........................................................................... 21
8.5 The gripping force drops? ...................................................................................... 21
8.6 Module does not achieve the opening and closing times? ................................... 21

Table of contents
4 03.01|LGP 08 - 40|en
9 Maintenance and Care ............................................................................................ 22
10 Translation of original declaration of incorporation................................................. 23

About this manual
03.01|LGP 08 - 40|en
5
About this manual
This instruction is an integral part of the product and contains im-
portant information for a safe and proper assembly, commission-
ing, operation, maintenance and helps for an easier trouble shoot-
ing.
Before using the product, read and note the instruction, especially
the chapter "Basic safety notes".
Warnings
The following signal words and symbols are used to highlight dan-
gers.
Signal words
DANGER Dangers for persons.
Non-compliance will inevitably cause irreversible injury or death.
WARNING Dangers for persons.
Non-compliance may cause irreversible injury or death.
CAUTION Dangers for persons.
Non-observance may cause minor injuries.
NOTICE Information about avoiding material damage
Symbole
Warning about a danger point
Warning about hand injuries
General mandatory sign to prevent material damage
1
1.1
1.1.1
1.1.2

About this manual
6 03.01|LGP 08 - 40|en
Variants
This operating manual applies for the following variations
•LGP without gripping force maintenance
•LGP with gripping force maintenance device "O.D. gripping"
•LGP with gripping force maintenance device "I.D. gripping"
Applicable documents
•General terms of business
•SCHUNK catalog gripping modules
•Assembly and Operating Manuals for sensors
The documents listed up here, can be download on our homepage
www.schunk.com.
1.2
1.3

Basic safety notes
03.01|LGP 08 - 40|en
7
Basic safety notes
Intended use
The module was designed to grip and to temporarily and securely
hold workpieces and objects.
The module is intended for installation in a machine/system. The
requirements of the applicable guidelines must be observed and
complied with.
The module may be used only in the context of its defined applica-
tion parameters (6, Page 12).
To use this unit as intended, it is also essential to observe the
technical data and installation and operation notes in this manual
and to comply with the maintenance intervals.
Not intended use
It is not an intended use if the module is used, for example, as a
pressing tool, stamping tool, lifting gear, guide for tools, cutting
tool, clamping device or a drilling tool.
Environmental and operating conditions
•Make sure that the module and the top jaws are a sufficient
size for the application.
•Ensure that the environment is clean. Observe the mainten-
ance and lubrication intervals. Link Wartungs- und Schmierin-
tervalle
•Make sure that the environment is free from splash water and
vapors as well as from abrasion or processing dust. This ex-
cludes modules that are designed specially for contaminated
environments.
2
2.1
2.2
2.3

Basic safety notes
8 03.01|LGP 08 - 40|en
Product safety
Dangers arise from the module, if e.g.:
•the module is not used in accordance with its intended pur-
pose.
•the module is not installed or maintained properly.
•the safety and installation notes are not observed.
Avoid any manner of working that may interfere with the function
and operational safety of the module.
Wear protective equipment.
NOTE
More information are contained in the relevant chapters.
Protective equipment
Provide protective equipment per EC Machinery Directive.
Demands on the top jaws
Arrange the top jaws such that when the module is depressurized
it can reach one of the end positions either open or closed and
therefore no residual energy can be released when changing the
top jaws.
Constructional changes, attachments, or modifications
Additional drill holes, threads, or attachments that are not offered
as accessories by SCHUNK may be attached only with permission
of SCHUNK.
Personnel qualification
The assembly, initial commissioning, maintenance, and repair of
the module may be performed only by trained specialist person-
nel. Every person called upon by the operator to work on the
module must have read and understood the complete assembly
and operating manual especially the chapter "Basic safety notes"
(2, Page 7). This applies particularly to personnel only used oc-
casionally, such as maintenance personnel.
2.4
2.4.1
2.4.2
2.4.3
2.5

Basic safety notes
03.01|LGP 08 - 40|en
9
Using personal protective equipment
When using this product, observe the relevant industrial safety
regulations and use the personal protective equipment (PPE) re-
quired!
•Use protective gloves, safety shoes and safety goggles.
•Observe safe distances.
•Minimal safety requirements for the use of equipment.
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 con-
nected.
•Do not reach into the open mechanism or the movement area
of the module.
•Perform maintenance, modifications, and additions outside the
danger zone.
•For all work, secure the unit against accidental operation.
•Take a precautionary approach by maintenance and disassem-
bly.
•Only specially trained staff should disassemble the module.
2.6
2.7

Basic safety notes
10 03.01|LGP 08 - 40|en
WARNING
Risk of injury due to squeezing and bumping during movement
of the gripper jaws and breaking or loosening of the gripper fin-
gers !
WARNING
Risk of injury from objects falling and being ejected
•The danger zone must be surrounded by a safety fence during
operation.
WARNING
While disassembling uncontrollable moves of parts of the grip-
per possible!
Variant gripping force maintenance
WARNING
Risk of injury from objects falling during energy supply failure
Modules with a mechanical gripping force maintenance can, dur-
ing energy supply failure, still move independently in the direc-
tion specified by the mechanical gripping force maintenance.
•Secure the end positions of the module with SCHUNK SDV-P
pressure maintenance valves.
2.7.1

Accessories
03.01|LGP 08 - 40|en
11
Warranty
The warranty is valid for 24 months from the delivery date to the
production facility under the following conditions:
•Appropriate use in 1-shift operation
•Observance of the ambient conditions and operating conditions
Parts touching the workpiece and wearing parts are not part of the
warranty. Also observe our general terms of business.
Scope of delivery
The scope of delivery includes:
•2-Finger-parallel gripper LGP
in the ordered model.
•Accessory kit
Accessories
The following accessories that are required for the module must
be ordered seperately:
•Sensors
To get information about which accessories can be used with the
appropriate product variant, ☞catalog.
Sensors
Overview of the compatible sensors
Designation Type
Programmable magnetic switch MMS-P
•Exact type designation of the compatible sensors see ☞catalog
•If you require further information on sensor operation, contact
your SCHUNK contact person or download information from
our homepage.
3
4
5
5.1

Technical data
12 03.01|LGP 08 - 40|en
Technical data
size 08 10 16 20 25 40
Stroke per jaw [mm] 2 3 5 6 8 13
Weight [kg]
without gripping force maintenance
with gripping force maintenance device
0.03
0.04
0.07
0.08
0.15
0.16
0.24
0.25
0.46
0.48
1.5
1.6
Recommended workpiece weight [kg] 0.13 0.29 0.6 1.2 1.9 4.2
Max. permissible finger length [mm] 20 25 32 40 50 64
Max. permitted weight per finger [kg] 0.03 0.04 0.06 0.09 0.12 0.3
ambient temperature [°C]
ambient temperature min. [°C]
ambient temperature max. [°C]
-10
90
Min. spring force [N]
without gripping force maintenance
with gripping force maintenance device AS
with gripping force maintenance device IS
-
6
6
-
16
16
-
20
20
-
40
40
-
80
80
-
250
250
Closing force [N]
without gripping force maintenance
with gripping force maintenance device AS
with gripping force maintenance device IS
26
32
-
58
74
-
120
140
-
240
280
-
380
460
-
840
1090
-
Opening force [N]
without gripping force maintenance
with gripping force maintenance device AS
with gripping force maintenance device IS
36
-
42
70
-
86
138
-
158
280
-
320
438
-
518
928
-
1178
IP rating 40
Pressure medium compressed air, standard for quality of the com-
pressed air according to ISO 8573-1: 6 4 4
Min. pressure [bar]
without gripping force maintenance
with gripping force maintenance device
2
4
Max. pressure [bar]
without gripping force maintenance
with gripping force maintenance device
8
6.5
Further technical data can be found in our catalog. The most re-
cent version applies.
6

Assembly
03.01|LGP 08 - 40|en
13
Assembly
Mechanical connection
The values relate to the entire bolting surface.
Requirements for levelness of the bolting surface
Diameter [mm] Permissible unevenness [mm]
< 100 < 0.02
> 100 < 0.05
The module can be mounted from the rear or on the side:
Fig. 1 Assembly options
Maximal screw-in depth of the fastening screws provided by the
customer.
mounting material (provided by customer)
Item Mounting 08 10 16 20 25 40
1 Module rear
mounting
M3 / 7.4 deep M4 /
10 deep
M5 /
13 deep
M8 /
16 deep
2 Module side
mounting
M3 M3 / 7.4 deep M4 /
10 deep
M5 /
11 deep
M8 /
16 deep
3 top jaws M3 /
5deep
M3 / 7.4 deep M4 /
10 deep
M5 /
11 deep
M8 /
16 deep
99 centering sleeve Ø5h6 / 4.35 deep Ø6h6 /
5.35
deep
Ø8h6 /
5.35
deep
Ø12h6 /
6.65
deep
7
7.1
Check the evenness
of the bolting surface
Mounting

Assembly
14 03.01|LGP 08 - 40|en
NOTE
•When mounting from rear or on the side, mount the module
using the centering sleeves (99) provided.
•Mount the module using the mounting bores.
•Mount the top jaws using the mounting bores provided.
Air connection
NOTICE
The maximum permissible mass per jaw is exceeded:
•Attach flow control couplings to the module.
NOTICE
Observe the requirements for the air supply.
(6, Page 12)"Technical data"
Fig. 2 Air connection
thread diamteter of the air connections
Item connection 08 10 16 20 25 40
1 thread diamteter of the air connections
(A = open, B = closed) 2 x M3 2 x M5 2 x
G1/8"
7.2

Assembly
03.01|LGP 08 - 40|en
15
Sensors
The gripper is ready to be used with the MMS-P sensors.
•If you require further information on sensor operation, contact
your SCHUNK contact person or download information from
our homepage.
•Technical data of the sensors can be found in the data sheets
(included in the scope of delivery).
Programmable magnetic switch (MMS-P)
NOTE
The MMS-P can be used only for sizes LPG 08 – LPG 40
36 – 40
19.5
8. 9
M2.5
30
L= 1 00
L= 500
2.95
4.4
0.5
1
3
45
6
2
Fig. 3 Magnetic switch (MMS-P 22)
1 mounting screw 4 Teach-button
2 center sensor elements 5 LED display
3 LED display 6 Rips for cable tires
Fig. 4 Connection diagram PNP-4 conductor (MMS-P 22)
7.3
7.3.1

Assembly
16 03.01|LGP 08 - 40|en
Types available for order (see catalog):
•MMS-P 22-S-M8-PNP
•MMSK-P 22-S-PNP
•V2-M8-4-2XM8-3
The MMSK-P 22-S-PNP features a cable with open strands so that
it can be connected by means of terminal contacts.
The V2-M8-4-2XM8-3 distributor is used to convert the 4-pin con-
nector plug of the MMS-P 22-S-M8-PNP sensor to two standard
M8 plugs with 3 pins each.
NOTICE
Sensor can be damaged during assembly.
•Do not exceed the maximum tightening torque of 10 Ncm for
the set screws.
NOTE
Ferromagnetic material changes the switching positions of the
sensor. For example: Adapter plate made of ordinary steel.
At ferromagnetic adapter plates:
•The module must firstly be mounted on the adapter plate
•Then, the positions of the magnetic switch have to be set
7
6
Fig. 5
1 To relieve the cable, the electronics have to be fixed in place
using cable ties (7).
There are ribs (6) in place on the electronics for mounting
purposes.
Mounting of the sensor

Assembly
03.01|LGP 08 - 40|en
17
Fig. 6
2 Turn in the sensor (1 - 4).
OR
Push the sensor axially into the slot until it contacts the stop
(5).
3 Fix the sensor with an Allen wrench (6).
Fig. 7:
If there is no terminal stop, then slide the magnetic switch accord-
ing to dimension l2 (bottom edge of gripper up to front side of
sensor) or according to dimension l1 (bottom edge of gripper up to
double arrow on sensor) and then clamp.
Type Maß l1[mm] Maß l2[mm] Type Maß l1[mm] Maß l2[mm]
LGP 08 15.2 24.1 LGP 20-AS 20.6 29.5
LGP 08-AS 10.1 19.0 LGP 20-IS 25.6 34.5
LGP 08-IS 18.4 27.3 LGP 25 33.6 42.5
LGP 10 18.4 27.3 LGP 25-AS 25.6 34.5

Assembly
18 03.01|LGP 08 - 40|en
Type Maß l1[mm] Maß l2[mm] Type Maß l1[mm] Maß l2[mm]
LGP 10-AS 15.9 24.8 LGP 25-IS 33.6 42.5
LGP 10-IS 18.4 27.3 LGP 40 45.3 54.2
LGP 16 23.0 31.9 LGP 40-AS 29.3 38.2
LGP 16-AS 19.0 27.9 LGP 40-IS 45.3 54.2
LGP 16-IS 23.0 31.9
LGP 20 25.6 34.5
1 Keep the Teach-Button (4) pressed for 2 seconds.
After 2 seconds LED 1 (3) is flashing.
2 Move the gripper into position 1 (e.g. "open").
3 Press the Teach-Button (4) briefly.
LED 1 (3) lights up and LED 2 (5) is flashing.
4 Move the gripper into position 2. (e.g. „-2mm“).
LED 1 (3) should turn out as soon as the switching point 1 is
left.
5 Press the Teach-Button (4) briefly.
LED 2 (5) lights up.
The switching points are set.
The hysteresis to both switching points will be adjusted automati-
cally corresponding to the characteristics of the magnetic field.
The user can set the switching and trigging points of each position
a little bit closer than for the automatic mode. The trigging point is
closer to the switching point. At the same time the susceptibility to
trouble and damage increases. In the mode of the lowest hystere-
sis, an error signal (such as jitter or untimely switch off) can be
avoided, if the sensor is protected against all types of disturbances
(i.e. by shielding). Frequent types of disturbances are change in
temperature and electro-magnetic influences.
Within the closest fine-teach mode, SCHUNK cannot guarantee
EMC-compatibility any more.
The hysteresis adjustment is used for the manual adjustment of
the switching points (if necessary).
In case that the hysteresis automatically determined by the sensor
should be too high or too low after “the adjustment of the switch-
ing points”, you may correct the value as follows.
The sensor avoids a too small hysteresis during hysteresis adjust-
ment. The lowest securely detectable difference in stroke is ≤10 %
of the nominal stroke.
Setting up the
switching points
Adjusting the
hysteresis

Assembly
03.01|LGP 08 - 40|en
19
3 4 5
1 Press the Teach-Button (4) for 5 seconds.
LED 1 (3) will flash up after 2 seconds
LED 1 will stop after 5 seconds.
2 Release the Teach-Button.
3 Put the gripper to position „switch-off point of switching point
1”.
4 Press the Teach-Button (4) briefly. LED 1(3) will light up twice.
5 Put the gripper to position „switch-off point of switching point
2”.
6 Press the Teach-Button (4) briefly.
LED 2 (5) will light up twice.
The Mounting of the sensor MMS-P is completed.

Troubleshooting
20 03.01|LGP 08 - 40|en
Troubleshooting
Modul does not move?
Possible cause Corrective action
Base jaws jam in housing, possible cause:
bolting surface not sufficiently level.
Check the levelness of the bolting surface.
(7.1, Page 13)
Loosen the mounting screws for the gripper
and actuate the gripper again.
Pressure drops below minimum. Check the air supply.
(
7.2, Page 14)
Compressed air lines switched Check compressed air lines.
Proximity switch defective or set incorrect. Repair the proximity switch.
Unused air connections not closed. Close the unused air connections.
Choke valve closed. Open the choke valve.
Component is broken, e.g. through over-
loading
Replace the module.
The module does not travel through the entire stroke?
Possible cause Corrective action
Pressure drops below minimum. Check the air supply.
(
7.2, Page 14)
Mounting surface is not even enough Check the levelness of the bolting surface.
(7.1, Page 13)
Component is broken, e.g. through over-
loading
Replace the module.
Module opens or closes abruptly?
Possible cause Corrective action
Compressed air lines are blocked Check the compressed air lines for crushing
or damage.
Mounting surface is not even enough Check the levelness of the bolting surface.
Throttle check valve is missing or not set
correctly
Install and adjust throttle check valve
Load too high Review permissible weight and length of the
jaws
(
7.1, Page 13)
8
8.1
8.2
8.3