Festo DGO-xxx-A-B series User manual

(en) Operating
instructions
Pneumatic linear drive
DGO-...-A-B
8074779
2017-10c
[8074781]

DGO-...-A-B
Festo DGO-...-A-B 2017-10c
2
Original instructions
Symbols: Fitting and commissioning to be carried out
by qualified personnel only in accordance
with the operating instructions.
Warning, Caution
Please note
Antipollution
Accessories
English 3.......................................................................

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Pneumatic linear drive
DGO-...-A-BEnglish
Documentation on the product
For all available product documentation èwww.festo.com/pk
1 Operating parts and connections
123
456
1Fastening thread
2Compressed air port
3Thread for fastening the work load
4Lubricating nipple
5Integrated switching magnet
6Adjusting screw for end position cushioning
(not with DGO-12-...)
Fig. 1

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2 Function
When the compressed air ports are pressurized alternately, the piston moves back
wards and forwards in the tubing. By means of a magnet coupling this movement
is transferred to the outer slide.
3 Application
The DGO-... has been designed for transporting mass loads.
4 Transport and storage
SConsider the weight of the product.
Depending on the design, the DGO-...
weighs over 10 kg.
Fig. 2

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5 Conditions of use
Please note
Malfunctions will occur if the device is not used correctly.
SEnsure that the specifications in this chapter are always observed.
SCompare the maximum values specified in
these operating instructions with your
actual application (e.g. forces, torques,
temperatures, masses).
The product can only be operated in
accordance with the relevant safety
guidelines if the maximum loading limits
are observed.
SObserve the ambient conditions at your location.
Corrosive elements in the environment (e.g. ozone) will reduce the service life
of the product.
SPlease comply with national and local safety laws and regulations.
SUse the product in its original state. Unauthorized modification is not
permitted.
SRemove all transport packing such as foils, caps, cardboard.
Exceptions: adhesive labels on compressed air ports (danger of dirt entering
the tubing)
The packing is intended for recycling (except for: oiled paper which must be
disposed of).
SMake sure there is a supply of correctly
prepared compressed air (see “Technical
specifications”).
Fig. 3
[%] [mbar][°C]
LF-... LR-...
Fig. 4

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6 Fitting
Fitting mechanical components
SAvoid damaging the cylinder barrel.
Damage to the cylinder barrel will reduce
the reliability and the service life of the
DGO-...
SPlace the DGO-... so that all the operating
parts are accessible (lubricating nipple,
adjusting screws).
SMake sure that the drive is fitted free of
mechanical stress and distortion.
When the drive is fitted in a vertical position:
SMake sure that the slide has reached a stable position when it comes to a
stand (e.g. the lowest point or secure it with a moveable bolt).
Work loads with their own guide:
Please note
Jamming and non-permitted bending, e.g. due to tilting torques, reduce the
service life of the DGO-....
The max. permitted misalignment of parallel guiding is 1 mm.
SMake sure that a degree of freedom is maintained between the slide and the
work load.
Driver type FKG-... can be used for this purpose. (see chapter “Accessories”).
Fig. 5
Fig. 6
Ó
Ó
Ó
Ó
Ó
Fig. 7

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Fitting the work load:
SPlace the work load so that the tilting torque of force Fax parallel to the
movement axis and lever arm “a” remains low (see Fig. 8).
SObserve the maximum values for radial force Frad (see Fig. 8).
150
200
500
1000
100
50
30
20
10
Fax
a [mm]
Fax [N]
H [mm]
H
Frad
a
Frad [N]
DGO-12
DGO-16
DGO-20
DGO-25
DGO-32
DGO-40
Fig. 8

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With heavy work loads or at high and medium slide speeds:
SMake sure that the impulse of the load and the speed lies within the permitted
range.
Depending on the size of the work mass, the DGO-... will withstand maximum
speeds as shown in the following diagram:
m [kg]
vver
[m/s]
vhor
[m/s]
m [kg]
Fig. 9
Loadings in excess of the specified maximum values:
Use additional external shock absorbers or fixed stops of sufficient size.

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Fitting proximity switches:
SPlace the proximity switches so that they can be actuated reliably by the
magnet.
In the following example the proximity switches are fitted onto a rod
(dia. 6 mm) with the aid of fastening kit SMB-1.
1
X
A
1
SwitchingPos
23
1Magnet
2Switching range
3Proximity switches
Fig. 10
SAlways place the proximity switches in the gaps A and X.
– If the gap is too small, this may lead to multiple switching.
– If the gap is too large, the switch will not be actuated reliably.
AX (+0.5 mm) Switch.
path
Hystere
sis
12 18 20 25 32 40
SMEO-1,
SMTO-1
6 ... 8
mm
10.5
mm
13.5
mm
16.5
mm
20.5
mm
25.5
mm
32.5
mm
7,5 ...
13 mm
1 ... 4.5
mm
SMPO-1-H-B 5 ... 6
mm
7…15
mm
0,4 ... 2.5
mm
Fig. 11: Gaps for proximity switches

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Fitting pneumatic components
Fitting in a vertical or sloping position:
Warning
If there is a pressure failure, the work mass will slide down.
Uncontrolled moving masses can cause injury to people or damage to property
(danger of fingers being squashed).
SCheck whether non-return valves (with control) of type HGL-... are required
here. In this way, you can prevent the work mass from sliding down suddenly.
(work mass = slide mass + mass of the work load)
Setting the slide speed:
SScrew one-way flow control valves of type GRLA-... into the compressed air
ports.
Other accessories with excessive screw depth L will damage the internal slide
of the DGO-.... Fig. 12 shows the maximum screw depth:
DGO-... 16 20 25 32 40
Lmax 4.8 mm 8 mm 7 mm 9 mm 10 mm
Fig. 12: Maximum screw depth Lmax of the compressed air ports
Controlling the DGO-...:
SUse 3/2-way valves (in basic position
open) for both compressed air ports.
Fig. 13

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7 Commissioning
Commissioning the complete system
SAlways pressurize the complete system
slowly.
In this way you will prevent sudden
uncontrolled movements.
For slow start-up pressurization, use
start-up valve type HEL-.../HEM-... .
Commissioning the DGO-...
Warning
Make sure that:
‒ nobody can place his/her hand in the
path of the moving mass (e.g. by
providing a protective grill).
‒ there are no objects in its path.
It must not be possible to touch the
DGO-... until it has come to a complete
stand.
1. Close both one-way flow control valves
– at first completely,
– then loosen them one turn.
Fig. 14
Ó
Ó
Ó
ÓÓ
ÓÓ
Fig. 15
Fig. 16

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2. Close the adjusting screws for the end
position cushioning on both sides
– completely,
– then loosen them one turn.
3. Pressurize the DGO-... as follows:
– slow pressurization of one side or
– simultaneous pressurization of both
sides with subsequent exhausting of
one side.
Otherwise excessive loadings will occur at the start when the slide moves into
an end position too quickly or without an air cushion.
For slow start-up pressurization, use start-up valve
type HEL-... / HEM-....
4. Start a test run.
5. Check whether the following settings need to be modified.
– the slide speed
– the end position cushioning.
Mass geometries with projection in the longitudinal direction of the slide:
Warning
Note that the following screws must only
be turned when the DGO-... is at a stand:
– the adjusting screws for the end
position cushioning
– the adjusting screws for the one-way
flow control valves.
ÓÓ
Fig. 17
Ó
Ó
Ó
Ó
Ó
Ó
Ó
Ó
Ó
Ó
Ó
Ó
Ó
Fig. 18
Fig. 19

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6. Open up the one-way flow control valves
slowly again until the desired speed is
reached.
7. Open up the adjusting screws for the end
position cushioning on both sides until
the desired cushioning is reached.
The moveable mass should reach the end
position safely without striking hard
against it.
8 Operation
Warning
Make sure that:
‒ nobody can place his/her hand in the
path of the moving mass (e.g. by
providing a protective grill).
‒ there are no objects in its path.
It must not be possible to touch the
DGO-... until it has come to a complete
stand.
Warning
Make sure that the moveable mass is always cushioned gently.
Otherwise the magnet coupling will tear off (see “Eliminating faults”).
With vertical or sloping drive mountings, the moveable mass will then slide
down.
Fig. 20
ÓÓ
Fig. 21
Ó
Ó
Ó
ÓÓ
ÓÓ
Fig. 22

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SMake sure that the operating medium selected at the start is maintained for
the entire service life of the product.
Changing from lubricated to non-lubricated compressed air:
Wear will increase due to the washed-out service life lubrication.
SReturn the DGO-... to Festo for overhaul.
If modifications are made to the project planning:
SMake sure that the maximum limits are observed, especially for forces and
torques (see Fig. 8) and maximum speeds (see Fig. 9).
9 Care and maintenance
SClean the cylinder barrel if required with a soft cloth.
The following cleaning agents are permitted: all non-abrasive media.
SLubricate the DGO-... at the lubricating nipple with Festo special grease type
LUB-KC1 (silicon-free).
Lubrication intervals: every 500 kilometres run
SNote that lubrication must be undertaken more often:
– if the drive is operated in high temperatures
– if there is excessive dirt
– if there are fat-solvent fluids or fumes in the vicinity.
10 Repairs
SMake use of the opportunity to have your DGO-... overhauled by our repair
service.

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11 Accessories
Accessories Type
Driver for compensating for misalignments and
for avoiding tilting torques (for dia. 16...40)
FKG-...
Foot fastening (for dia. 12...25)
Flange fastening (for dia. 12...25)
Flange fastening (for dia. 32, 40)
HBN-...
FBN-...
FV-...
Proximity switch SMEO-1-... / SMTO-1-... / SMPO-1-...
Fastening kit for proximity switches
Sockets for proximity switches
SMB-1
SIM-M8-...
One-way flow control valve
Non-return valve with control
GRLA-...
HGL-...
Screw connector QS-...
Lubricating grease see chapter 9
12 Eliminating faults
Fault Possible cause Remedy
Uneven
movement of
the slide
One-way flow control valve not
fitted correctly
If possible restrict exhaust
Lubrication missing Lubricate
Cylinder barrel dirty Clean, provide a cover
Cylinder barrel damaged Consult Festo after-sales service
Slide does not
come into
stroke end
position
Adjusting screw of end position
cushioning completely closed
Open adjusting screw
Magnetic coupling is interrupted Press the external slide into the
end position until the internal
slide couples in again against the
magnetic repelling force

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13 Technical specifications
DGO-... 12 16 20 25 32 40
Medium Filtered compressed air, lubricated or non-lubricated; other media on
demand
Design Double-acting, with magnet coupling, without piston rod
Pressure range [bar] 2...7 1.7...7 1.6...7 1.5...7 1.4...7 1.3...7
Temperature range - 20 ... + 60 °C
Connections
Fastening for the
cylinder barrel
M
16 x 1.5
M
16 x 1.5
M
22 x 1.5
M
22 x 1.5
M
30 x 1.5
M
38x1.5
Compressed air port M 5 M 5 G 1/8 G 1/8 G 1/8 G 1/4
Fastening the load M 5 M 6 M 8
Lubricating nipple DIN 3405 AM 6
Magnetic pull-off
strength
100 N 160 N 270 N 400 N 680 N 1050 N
Theor. force at 6 bar 68 N 121 N 188 N 295 N 483 N 754 N
Mounting position As desired
End position
cushioning
Pneumatic, adjustable (not with DGO-12-...-P-A-B)
Cushioning length –14 mm 17 mm 19 mm 20 mm 23 mm
Axial torsional
strength of the
external slide
360°
Materials Slide and end cover: Al (anodized):
Cylinder barrel: Steel, stainless
Seals: Buna N; polyurethane

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tion of its contents to others without express authorization is
prohibited. Offenders will be liable for damages. All rights re
served in the event that a patent, utility model or design patent is
registered.
Copyright:
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
Phone:
[phone]
Fax:
[phone]
E-mail:
[e-mail]
Internet:
www.festo.com