Afag DG 20 Technical specifications

Rotary gripper
DG 20
 Declaration of Incorporation
 Module Information
 Montage Instructions
 Maintenance Instructions
„Translation“ of the Original Montage Instructions
© Copyright by Afag Automation AG
These Montage Instructions apply to:

2 DG 20 - OI vers. 1.4 gb. 20190712
Type Order No.
Rotary gripper DG 20 50432971
Assembly and initial start-up must be carried out by qualified personnel only and ac-
cording to these Montage Instructions.
Version of this docu-
mentation: DG 20 - OI vers. 1.4 gb. 20190712
Symbols:
WARNING
Indicates a possible dangerous situation.
Non-compliance with this information can result in death or serious
personal injuries (invalidity).
CAUTION
Indicates a possibly dangerous situation.
Non-compliance with this information can result in damage to proper-
ty or light to medium personal injuries.
NOTE
Indicates general notes, useful operator tips and operating recom-
mendations which don't affect safety and health of the personnel.

DG 20 - OI vers. 1.4 gb. 20190712 3
Table of Contents:
1.0.0 EC Declaration for Incorporation (Document original) .................................. 5
1.1.0 According to: 2006/42/EC ............................................................................... 5
2.0.0 Module Information .......................................................................................... 6
2.1.0 Safety instructions ........................................................................................... 6
2.1.1 Transport, handling, storage ........................................................................... 6
2.1.2 Module description .......................................................................................... 6
2.1.3 Installation, connections .................................................................................. 7
2.1.4 Installation and fastening possibilities ............................................................. 8
2.1.5 Tightening moments for screws ...................................................................... 9
2.1.6 Pneumatic connection ..................................................................................... 9
2.1.7 Manufacture of gripper fingers ...................................................................... 11
2.1.8 End stop 90° ................................................................................................. 13
3.0.0 Montage Instructions ..................................................................................... 15
3.1.0 Manufacturer address: .................................................................................. 15
3.1.1 Included in the scope of delivery ................................................................... 16
3.1.2 Intended use ................................................................................................. 16
3.1.3 Guarantee ..................................................................................................... 17
3.1.4 Safety instructions ......................................................................................... 17
3.1.5 Dimensions drawing of the DG 20 ................................................................. 18
3.1.6 Technical data of the DG 20 ......................................................................... 19
3.1.7 Perferred combinations of the DG 20 ............................................................ 20
3.1.8 Loads on the gripper fingers ......................................................................... 21
3.1.9 Adjustment of the DG 20 rotary grippers ....................................................... 21
3.2.0 Installation of the sensors ............................................................................. 22
3.2.1 Preparation for start-up ................................................................................. 23
3.2.2 Adjustment, retrofitting .................................................................................. 24
3.2.3 Standard operation ........................................................................................ 24
4.0.0 Maintenance Instructions .............................................................................. 25
4.1.0 Maintenance and servicing ........................................................................... 25
4.1.1 Servicing ....................................................................................................... 27
4.1.2 Troubleshooting ............................................................................................ 28
4.1.3 Spare parts ................................................................................................... 30

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4.1.4 Accessories ................................................................................................... 30
4.1.5 Disassembly and repair ................................................................................. 33
4.1.6 Disposal ........................................................................................................ 34

DG 20 - OI vers. 1.4 gb. 20190712 5
1.0.0 EC Declaration for Incorporation (Document original)
1.1.0 According to: 2006/42/EC
Standard: EN ISO 12100:2010 (German Version)
The manufacturer:
Afag Automation AG, Fiechtenstrasse 32, CH-4950 Huttwil
hereby declares that the incomplete machine:
Product name: Rotary gripper (pneumatic)
Types: DG 20
Consecutive serial No. 50xxxxxx
- Machinery Directive: 2006/42/EC
- Standard: EN ISO 12100:2010 (German Version)
- Safety of machinery General principles for risk assessment and risk reduction.
- The special technical documents shall be sent to a reasoned request by na-
tional authorities in printed documents or electronically (pdf).
Applied and fulfilled essential requirements:
- 1.1; 1.1.1; 1.1.2; 1.2.3; 1.2.4.4; 1.3; 1.3.5; 1.3.6; 1.3.7; 1.3.9; 1.4.1; 1.5; 1.5.3;
1.6; 1.6.1; 1.6.3; 1.6.4; 1.7; 1.7.4; 1.7.4.1; 1.7.4.2
Who installs this incomplete machine or assemble with other machines, a risk as-
sessment for its resulting machine which must make the provisions of the
EC directive: 2006/42/EC
Norme: EN ISO 12100:2010 (German Version)
Agent:
For the compilation of the technically relevant documents:
Niklaus Röthlisberger, Producte Manager Afag Automation AG, CH-4950 Huttwil
Place, Date: Huttwil, 12.07.2019
Siegfried Egli Niklaus Röthlisberger
Managing Director Product Manager HT
Afag Automation AG Afag Automation AG

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2.0.0 Module Information
2.1.0 Safety instructions
Modifications on the DG 20 rotary gripper that are not described in these Montage
Instructions or have not been approved in writing by Afag Automation AG are not
permitted. In case of improper changes or assembly, installation, operation, mainte-
nance or repairs, Afag Automation AG rejects all liability.
2.1.1 Transport, handling, storage
The following conditions must be met for transport and storage:
Storage temperature: 0 – 50°
Humidity: <90%, non condensing
CAUTION
The DG 20 rotary grippers are packed in the original box. In the
case of improper handling the module may drop out of the box
when it is unpacked and cause injuries to limbs.
The weight of the DG 20 rotary gripper is 0.63 kg.
NOTE
Consider please!
With each module security is settled a technical newspaper. This
newspaper is to be read busily by each person with the module.
2.1.2 Module description
The DG 20 rotary gripper is a precise mechanical device and must be handled with
adequate care and kept clean.
The DG 20 is a very compact pneumatic rotary gripper and is suitable for gripping
and turning small parts. It is fitted with a parallel gripping head. The rotary gripper
can be mounted vertically and horizontally.
The DG 20 rotary gripper consists of the rotary drive and the rotating pliers head. The
angle of rotation is 180°. An intermediate stop can be ordered as option which limits
the angle of rotation to 90°.

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NOTE
Please note:
Modifications on the DG 20 rotary gripper that are not described in
these Montage Instructions or have not been approved in writing by
Afag Automation AG are not permitted. In case of improper changes
or assembly, installation, operation, maintenance or repairs, Afag
Automation AG rejects all liability.
For further technical details please see chapter 3 on page 18 in these operating in-
structions.
Figure 1: Module description
2.1.3 Installation, connections
WARNING
The gripper fingers are moved by the pneumatic control. If the
gripper fingers cannot move freely there is danger of injuries
and bruises near the add-ons.
If add-ons at the DG 20 rotary gripper could cause danger in
connection with the gripper fingers a safe operation must be
ensured.
1 Rotary gripper - basic housing
2 Turret
3 Mounting holes Ø 4,3 mm
3
1
2

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WARNING
Due to the decentral controller the operator of the rotary gripper
needs not to be near the product so that third persons might be
endangered by the rotary/gripper operation.
Always switch off the controller and disconnect the module
from the compressed air supply and secure against being
switched on again unintentionally when you work on the DG 20
rotary gripper. The signals of the control system may cause un-
intentional movements of the module which may lead to per-
sonal injuries.
2.1.4 Installation and fastening possibilities
The DG 20 rotary grippers can be installed in a vertical and horizontal position.
The Afag module components are provided with a precise module centring which
guarantees a high and repetitive accuracy of fit during installation, operation and ex-
change of a module.
There are 2 centering sleeves with a diameter of 7 x 3 mm each at the short end and
on the rear of the module.
There are 4 centering sleeves with a diameter of 5 x 2.5 mm each on both sides of
the gripper drive.
Please see the dimension drawing for the dimensions of the mounting holes and the
distance between the holes (page 18).

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2.1.5 Tightening moments for screws
The screws to be used for assembly must at least satisfy the following conditions:
Standard: VDI 2230
Strength: class 8.8
Surface: galvanized blue, oiled or greased
Thread Tightening moments
M2,5
M3
0,6 … 0,8 Nm for fastening bolts of the stop
1,1 … 1,4 Nm
M4 2,6 … 3,3 Nm
M5 5,2 … 6,5 Nm
M6 9,0 ... 11,3 Nm
M8 21,6 … 27,3 Nm
2.1.6 Pneumatic connection
Pneumatic diagram DG 20. The pneumatic connections (total of 16 x M3) are fitted
on four sides of the base body of the DG 20 rotary gripper. The 4 air connections
(M3) at the rear of the DG 20 rotary gripper are normally open. Close air connections
which are not used air-tight before installing the module in a system.
4 Tuflon coated stud bolts M3 x 3 are supplied with the accessories.
Operating pressure: 6 bar +/-1
NOTE
Please note:
Close air connections which are not used air-tight before installing
the module in a system.
Carry out a leakage test.
HINWEIS
Minimal compressed air quality according to
ISO 8573-1; 2010 (7-4-4)

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Figure 2: Pneumatic plan
Figure 3: Pneumatic connections with corresponding movements
1 Rotary gripper 2 Maintenance unit
2 Directional valve 4/2
P Compressed air connection
1
3
2
P

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NOTE
Please note!
For a reliable interrogation of grasping „Part gripped“ is recommend-
ed to realize in the middle of the jaw stroke and not restrict the over-
all jaw.
Example: DG 20 2x6mm, jaw part gripped with 2x3.0mm
2.1.7 Manufacture of gripper fingers
The gripper fingers must be designed and manufactured for the parts to be gripped.
The design of the gripper fingers is in most cases symmetric.
Observe the maximum permissible loads on the fingers, see chapter Technical Data.
max. Fingers length 60 mm.

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Mounting to the turrent
You have the option of centering the mounting holes (eg to attach retainer) for the
end stop 90° DG 20 (on the rotating head on both sides) separate institutions.
Fastening on both sides
of the rotary head

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2.1.8 End stop 90°
A fixed end stop can be mounted as option on the DG 20 rotary gripper so that the
rotary gripping pliers can move at an angle of 90° to the end stop from both sides.
The approach is not dampened (fine adjustment must be carried out via the air
choke).The rotary angle is set with a tolerance of +/-5° for 90° (as for the 180° rotary
range).End stop 90°
End stop 90°
Order No: 50433546 (see Chapter 4 Accessories)
Mounting of the 90° fixed end stop (the end stop is part of the accessories)
Mounting of the fixed end stop depends on the desired direction of rotation (to the left
or to the right). The rotary head must then be turned through 180° by hand so that
the end stop acts on the correct side.
Mount the fixed stop using the 2 M2.5 mm Allen screws on the free side of the drive
(see figure).
Installation of the 90° fixed end stop
DG 20 mounting
side for the fixed
stop

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Rotary gripper DG 20
Standard version
Without fixed stop
Order no: 50432971
Option: Rotary gripper DG 20
Zero position at 90° on request
Order no: 50452096

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3.0.0 Montage Instructions
3.1.0 Manufacturer address: Afag Automation AG
Fiechtenstrasse 32
CH-4950 Huttwil
Sales Handling:
Tel. [phone]
www.afag.com
These operating instructions apply to:
Producte name: Rotary gripper (pneumatic)
Types: DG 20
Sequential series: No. 50xxxxxx
This is an incomplete machine
Who installs this incomplete machine or assemble with other machines, a risk as-
sessment for its resulting machine which must make the provisions of the
EC directive: 2006/42/EC
Standard: EN ISO 12100:2010 (German version)
Agent:
For the compilation of the technically relevant documents:
Niklaus Röthlisberger, Product Manager HT Afag Automation AG, CH-4950 Huttwil

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3.1.1 Included in the scope of delivery
Number Description
1 Module
2 Centering sleeves Ø8x3.5mm
2 Mounting screw M5x16 mm
2 Mounting screw M5x45 mm
4 Pin screw M5x4 mm
Table 1: Scope of delivery
3.1.2 Intended use
The DG 20 rotary gripper is used for the smooth rotary and gripping movement of
loads in non-explosion hazardous ambient and Installation conditions that are speci-
fied for this module (see Technical Data).
The DG 20 rotary grippers are exclusively intended for gripping useful loads (see
Technical Data) which do neither impair the safety of persons nor present a danger
to property and the environment. Combined with other modules they can be used as
a pick&place station.
NOTE
Any use that exceeds the use mentioned above is regarded as im-
proper.
The manufacturer does not accept any liability for damage resulting
from such use. The risk is that of the user alone.
Intended use also includes paying attention to the Montage Instruction and observing
the maintenance and repair instructions specified by the manufacturer.
CAUTION
The DG 20 rotary gripper may only be operated and serviced by
correspondingly trained personnel who have also profound
knowledge of the dangers.
The applicable regulations for prevention of accidents and the
other generally accepted safety-relevant and occupational safe-
ty and health regulations are to be followed.

DG 20 - OI vers. 1.4 gb. 20190712 17
3.1.3 Guarantee
NOTE
Torx screws may only be loosened by the manufacturer.
You are only allowed to loosen Allen screws.
Any additional claims are excluded.
3.1.4 Safety instructions
This Montage Instruction should be read carefully before carrying out any activity on
or with the module. The module may only be deployed in accordance with the in-
tended use. Modifications on the module that are not described in this Montage In-
struction or have not been approved in writing by Afag are not permitted. In the case
of improper changes or assembly, installation, operation, maintenance or repairs,
Afag AG rejects all liability.
CAUTION
Connection of a control system or compressed air and opera-
tion of the DG 20 rotary gripper may lead to unpredictable
movements which may result in personal injury or damage to
property.
The term of the warranty on Afag handling components and systems is:
 24 months following commissioning, but a maximum of 27 months following delivery.
 Wear parts (e.g. shock absorbers) are not covered by the warranty. *
The warranty covers the replacement or repair of defective Afag parts. No further claims will be
accepted.
The warranty will be voided in event of the following:
 Use for other than the intended purpose
 Failure to observe the notes on installation, commissioning, operation and maintenance in
the operating manual
 Improper installation, commissioning, operation and maintenance
 Independent repairs and constructional changes without prior instruction by Afag Automa-
tion AG
 Removal of the serial number on the product
 Using the module without shock absorbers, or with defective shock absorbers
 Inadequate monitoring of wear parts
*A customer has the right to a defect-free product. This is also applicable for accessories and wear parts, if they are defec-
tive.

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3.1.5 Dimensions drawing of the DG 20
Figure 2: DG 20 dimensions drawing
Use the centering sleeves included in the scope of delivery for positioning and insert
these sleevs in the borings of the mounting grid.
Note: It gives the DG 20 rotary gripper with the zero position at 90° on request.

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3.1.6 Technical data of the DG 20
Table 2: Technical data of the DG 20

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3.1.7 Perferred combinations of the DG 20