Festo DRRD-12 User manual

en Operating
instructions
8074788
2017-10d
[8074790]
Semi-rotary drive
DRRD-12 ... 63

DRRD-12 ... 63
2 Festo – DRRD-12 ... 63 – 2017-10d
Original instructions
Symbols: Installation and commissioning may only be per
formed in accordance with these instructions by
technicians with appropriate qualifications.
Warning
Caution
Note
Environment
Accessories
English 3.........................................................................

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English – Semi-rotary drive DRRD-12 ... 63
Table of contents
1 Control sections and connections 4............................................
2 Function and application 5...................................................
3 Requirements for product use 6...............................................
4 Transport and storage 7.....................................................
5 Installation 7..............................................................
5.1 Mechanical installation 7.....................................................
5.2 Pneumatic installation 9.....................................................
5.3 Electrical installation 9.......................................................
6 Commissioning 10...........................................................
6.1 Commissioning end-position adjustment 10.......................................
6.2 Carrying out commissioning 12.................................................
7 Operation 13...............................................................
8 Maintenance and care 14.....................................................
9 Disassembly and repair 15....................................................
10 Accessories 16..............................................................
11 Trouble-shooting 16.........................................................
12 Technical data 17............................................................

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Documentation on the product
For all available product documentation èwww.festo.com/pk
1 Control sections and connections
182345 6 7
9aJaA
1Supply port (swivel clockwise)
2Supply port (swivel anti-clockwise)
3Flanged shaft
4Shaft opening for guiding through cables/
compressed air tubing with centring hole
5Thread for accessories flange
6Thread for accessories (e.g. for clamping unit
and external shock absorbers)
7Centring hole for accessories
8Shock absorber for swivel angle adjustment,
secured with lock nut (x2)
9Slot for cylinder switch
(2x for DRRD-12); (4x for DRRD-16 ...) 63)
aJ Mounting interface DRRD (2x)
aA Mounting interface for payload (4x)
Fig. 1

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2 Function and application
The DRRD semi-rotary drive is a double-acting twin-piston drive. When the compressed air supply ports
are pressurized reciprocally, two pistons arranged in parallel move in the opposite direction backwards
and forwards. This linear motion is converted through pinions into a swivel motion of the drive shaft.
The end position cushioning is done:
– DRRD-...-P with flexible cushioning
– DRRD-...-Y9/Y10/Y14 with internal hydraulic shock absorbers
– DRRD-...-Y12 with external hydraulic shock absorbers (èassembly instructions).
The DRRD semi-rotary drive is intended for swivelling effective loads which have to execute a defined
angular movement.

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3 Requirements for product use
Note
Malfunction and material damage due to incorrect handling.
 Always comply with the specifications of this chapter.
This is the only way to ensure correct and safe product behaviour.
 Take into consideration the legal regulations applicable for the destination, as well as:
– regulations and standards
– regulations of the testing organizations and insurers
– national specifications.
 Note the warnings and instructions on the product and in the relevant operating instructions.
 Remove all transport packaging, such as transparencies, caps and cartons
(with the exception of any covers in the pneumatic ports).
The packaging is intended for recycling
(exception: oil paper = residual waste).
 Take into account the material specifications (è12 Technical data).
 Use the product in its original status, without any unauthorised product modifications.
 Take into consideration the ambient conditions at the location of use.
Corrosive elements in the environment (e.g. ozone) will reduce the service life of the product.
 Compare the limit values specified in these operating instructions with your actual application
(e.g. pressures, forces, torques, temperatures, masses, speeds).
Operation of the product in compliance with the relevant safety regulations is contingent on adher
ence to the load limits.
 Take the tolerance of the tightening torques into account. Unless otherwise specified, the tolerance
is ± 20 %.
 Do not modify any screws or threaded pins unless this is directly requested in these instructions. For
safety reasons, they are fixed with screw locking agent.
For vertical installation:
 Make sure the drive reaches a stable position when it comes to rest
(e.g. the lowest point or a variant with clamping unit è10 Accessories).
 Make sure the compressed air is properly prepared (è12 Technical data).
 Having selected a medium, stick with it for the entire life of the product
(e.g. always use unlubricated compressed air).
 Pressurize your entire system slowly.
There will then be no uncontrolled movements.
For slow start-up pressurisation, use start-up valve type HEL.

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4 Transport and storage
 Take into account the weight of the DRRD: It weighs up to 20 kg (è12 Technical data).
5 Installation
5.1 Mechanical installation
Note
 Handle the DRRD with care to prevent damage to the drive shaft. This applies in
particular to the following points:
1. Position the DRRD so that you can easily reach the control sections and connections.
2. Secure the DRRD at the mounting interface aJ by using two screws and two centring sleeves each.
The tightening torque is summarised in the following table (èTab. 1).
Direct mounting Through-hole fastening
aJ aJ
Fig. 2
Size 12 16 20 25 32 35 40 50 63
Screw (direct mounting) M5 M5 M5 M6 M8 M8 M10 M10 M12
Tightening torque [Nm] 6 6 6 10 18 18 30 30 55
Screw (through-hole fastening) M4 M4 M4 M5 M6 M6 M8 M8 M10
Tightening torque [Nm] 3 3 3 6 10 10 18 18 30
Centring sleeve ZBH [mm] 9 9 9 12 15 15 15 15 25
Tab. 1

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3. Feed the appropriate lines through the hollow
drive shaft, if necessary, or use the variant
with energy throughfeed.
The shaft opening for wiring has the following
dimensions (èTab. 2).
4. When mounting the moving mass, make sure
that the following specifications are observed:
– installation without tilting
– permissible radial force Fy
– permissible axial force Fx
– permissible mass moment of inertia
– a structure that is as rotationally symmet
rical as possible.
Fig. 3
The mass moment of inertia of the payload should be calculated. Lever arms, cantilevers and
masses should be considered in the calculation (maximum permissible values èCatalogue
specifications, www.festo.com/catalogue).
Note
If there are demanding requirements for concentricity of the components on the flanged
shaft:
 Use the middle centring hole 4as well as one of the 4 existing centring holes.
5. Secure the effective load to the drive flange at
the mounting interface aA by using at least
two screws positioned opposite one another
and centring sleeves.
The tightening torque is summarised in the
following table (èTab. 2).
aA
Fig. 4 4
Size 12 16 20 25 32 35 40 50 63
Shaft opening 4[mm] 5 8 8 10.5 10.5 10.5 21 21 21
Centring sleeve ZBH for middle
centring hole
[mm] 7 12 12 15 15 25 25 25 25
Screw for thread at aA M3 M4 M4 M5 M6 M6 M6 M8 M10
Centring sleeve ZBH [mm] 5 7 7 9 9 9 9 12 15
Tightening torque [Nm] 1.2 3 3 6 10 10 10 20 40
Tab. 2

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5.2 Pneumatic installation
 If necessary, remove the covers in the pneu
matic ports.
To adjust the swivel speed:
 Use the GRLA one-way flow control valves.
These are screwed directly into the com
pressed air supply ports.
Fig. 5
For vertical installation and eccentric loads:
 Use the controlled check valve HGL or a compressed air spacer compensation reservoir VZS.
In this way you can prevent the effective load from sliding down suddenly if there is a sudden pres
sure drop.
5.3 Electrical installation
Note
Multiple switching cycles of cylinder switches are possible, dependent on the design.
 Make sure the cylinder switches are always set to the first switching point.
To do this, push the cylinder switch (A) in from the slot end where the piston to be
sensed is located until the first switching occurs.
 Place the cylinder switches for sensing the end
positions into the slots 9.
Sensing can be conducted with inductive prox
imity sensors with the help of the external
sensing kit (è10 Accessories). 9
Fig. 6
(A)
9

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6 Commissioning
Warning
Danger of injury from rotating loads.
 Make sure the DRRD is only set into motion with protective devices.
 Make sure that in the swivel angle of the DRRD
– Nobody can reach in
– No foreign objects can enter
(e.g. by means of an individual protective guard).
Note
 Make sure that the following requirements are observed:
– the shock absorbers are secured with lock nuts
– the operating conditions are within the permissible ranges
– the assembly instructions for the DRRD-...-Y12 are observed.
6.1 Commissioning end-position adjustment
1. Rotate both upstream one-way flow control
valves (A):
– at first completely closed
– then open them again approximately one
turn.
2. Pressurize the drive optionally in one of the
following ways:
– slow pressurisation of one side
– simultaneous pressurisation of both sides
with subsequent venting of one side.
(A)
Fig. 7
Note
Risk of damage!
If the shock absorber is unscrewed too far, it will result in the piston colliding with the
end cap with insufficient cushioning.
 Observe the permissible shock absorber settings (èTab. 4).
3. Pressurize the corresponding port to swivel
the DRRD into the desired end position.
4. Loosen the lock nut on the shock absorber.
Fig. 8

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5. Turn the corresponding shock absorber until
the desired end position adjustment has been
reached.
Fig. 9
Angle adjustment Reaction Setting range related to the basic factory
setting (example DRRD-...-180)
Turn the shock
absorber clockwise
Reduce the swivel angle
Turn the shock
absorber anti-clockwise
Increase the swivel angle
Tab. 3
The following settings are possible:
Size 12 16 20 25 32 35 40 50 63
Elastic shock absorber on the
DRRD-...-P
Angle adjustment per rotation [°] 9.6 8.7 9.0 6.6 8.2 8.2 5.4 –
Max. shock absorber setting
XPmax
[mm] 18.8 19 19.4 26.1 31.8 43.2 44.7 –
Min. shock absorber setting
XPmin
[mm] 6 6 6.7 9 11 13.5 13.5 –
Hydraulic shock absorber on the
DRRD-...-Y9/Y10/Y14
Angle adjustment per rotation [°] 9.6 8.7 9.0 6.6 8.2 8.2 5.4 3.8 2.9
Max. shock absorber setting
XYmax
[mm] 29.9 38.5 43.3 64.9 80.7 99.9 101.4 130.4 126.9
Min. shock absorber setting
XYmin
up to the minimum swivel angle
(è12 Technical data)
Tab. 4

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6. Re-tighten the locking nut on the shock absorber by using the following tightening torque:
Size 12 16 20 25 32 35 40 50 63
ßInternal hexagon
socket
P [mm] 5 5 6 8 10 10 10 –
Y9/Y10/Y14 [mm] 2.5 3 4 5 5 6 6 8 8
ßLock nut [mm] 10 13 15 19 27 32 32 36 46
Tightening torque [Nm] 2 3 5 20 35 60 60 80 100
Tab. 5
7. Repeat the procedure to set the second end position.
6.2 Carrying out commissioning
1. Start a test run at low swivel speed.
2. When conducting the test run, check whether the DRRD settings need to be corrected.
These could be:
– swivel angle of the payload (èTab. 3)
– swivel speed of the payload.
3. Unscrew the one-way flow control valves (A) slowly again up to the desired swivel speed.
4. Interrupt the test run if the piston can be heard to strike hard.
Causes of metallic knocking may be:
– mass moment of inertia of the payload too high
– swivel speed of the payload too high
– no compressed air cushion on the exhaust side
– shock absorber unscrewed too far (maximum values èTab. 4).
5. Make sure you remedy the above-mentioned causes.
6. End the test run when all of the necessary corrections have been undertaken.

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7 Operation
Warning
Danger of injury from moving masses.
 Make sure that in the swivel angle of the DRRD
– Nobody can reach in
– No foreign objects can enter
(e.g. by means of an individual protective guard).
For several uninterrupted swivel cycles:
Note
Operational reliability can be impaired by an excessive temperature rise.
 Make sure that the following maximum swivel frequency is not exceeded.
Size 12 16 20 25 32 35 40 50 63
Maximum swivel fre
quency 1) 2)
P [Hz] 2.4 2.9 2.0 2.0 2.1 1.4 1.5 –
Y9 [Hz] 1.3 1.25 1.4 0.9 0.5 0.45 0.5 0.5 0.6
Y10 [Hz] – 0.6 – 0.3 0.3 0.3 0.28
Y14 [Hz] – 2.9 2.1 1.7 1.0 0.9 1.1 –
1) Longer reset times are to be expected at temperatures below 0 °C for all Y9/Y10/Y14 versions; it is therefore possible that the
maximum swivel frequency can no longer be reached under certain circumstances
2) The housing temperature of the shock absorber housing should not exceed 60 °C
Tab. 6

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8 Maintenance and care
To check the function of the shock absorbers:
 Proceed as follows:
DRRD-... P Y9/Y10/Y12/Y14
Test interval 2 million switching cycles 2 million switching cycles
(DRRD-12 … 40)
1 million switching cycles (DRRD-50/63)
Procedure 1. Check the function of the shock
absorbers.
In case of audible bottoming out or
rebounding:
2. Replace the cushioning components
and seals (lubricate the cushioning
components before installation with,
for example, LUB-KC1).
1. Check the function of the shock
absorbers for bottoming out and
rebounding.
2. Unscrew the shock absorber and
check for oil leaks.
In case of audible bottoming out,
rebounding or visible oil loss:
3. Replace the shock absorber and
seals (è9 Disassembly and repair).
Replacement
interval
If there is evidence of wear (bottoming
out)
If there is evidence of bottoming out,
leaking oil or
every 10 million switching cycles
(DRRD-12 … 40)
Every 5 million switching cycles
(DRRD-50)
Every 2 million switching cycles
(DRRD-63)
Tab. 7
If the piston can be heard to strike hard in the end position:
 Replace the following components if they are worn (è9 Disassembly and repair):
– the internal cushioning components of the DRRD-...-P
– both shock absorbers of the DRRD-...-Y9/Y10/Y14.
 If the DRRD is contaminated, clean it with a soft cloth.
Permissible cleaning agents include:
– warm soap suds up to +60 °C
– petroleum ether
– all non-abrasive cleaning agents.

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9 Disassembly and repair
For eccentric masses on the lever arm:
Warning
Danger of injury from masses dropping suddenly.
 Make sure the payload has reached a stable position before venting (e.g. the lowest
point).
Note
 Make sure that the semi-rotary drive is vented for disassembly.
 Recommendation: Send the product to our repair service.
This way the required fine tuning and tests will be taken into special consideration.
 Information about spare parts and aids can be found at: www.festo.com/spareparts
For replacement of the integrated cushioning components/shock
absorbers (è10 Accessories):
 Proceed as follows:
1. Vent the DRRD.
2. Measure the position of the shock absorber (dimension XP
or XY) and loosen the lock nut on the shock absorber 8.
3. Unscrew the shock absorber and:
– Lubricate the new cushioning component
(e.g. with LUB-KC1) and mount it (for DRRD-...-P).
Use new sealing discs (è(B) in Fig. 10), if required
– Replace shock absorber (for DRRD-...-Y9/Y10/Y14).
Use new sealing discs (è(C) in Fig. 10), if required.
4. Screw in shock absorbers up to dimension XP or XY (èpoint 2).
5. Check the angle adjustment and correct, if necessary.
6. Tighten the lock nut on the shock absorber 8(tightening
torque èTab. 5).
Fig. 10
(B)
(C)

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10 Accessories
Note
 Please select the corresponding accessories from our catalogue
(èwww.festo.com/catalogue).
11 Trouble-shooting
Malfunction Possible cause Remedy
Uneven movement of the
effective load
Flow control valves inserted
incorrectly
Check the flow control function
(supply or exhaust air flow
control)
Asymmetric angle setting Symmetric setting preferred
DRRD defective Return to Festo
Hard metal impact at the end
position
Drive shaft does not remain in
the end position (bouncing)
Residual energy too high Select a lower swivel speed
Use external shock absorbers
(è10 Accessories)
Move only against residual air
cushion on the exhaust side
Select a lighter mass
Semi-rotary drive moves against
an unpressurized chamber
Pressurize semi-rotary drive on
both sides
Shock absorber unscrewed too
far
Observe the maximum
permissible unscrewing length
Shock absorber/cushioning
component defective/worn
Replace shock
absorber/cushioning
component
(è9 Disassembly and repair)
Tab. 8

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12 Technical data
Size 12 16 20 25 32 35 40 50 63
Design Semi-rotary drive with twin pistons
Cushioning at both
ends
PElastic cushioning, with metal end position –
Y9 Hydraulic shock absorber
Y10 – Hydraulic shock absorber (hard)4)
Y14 – Hydraulic shock absorber (soft) –
Pneumatic port M5 M5 M5 M5 G1/8 G1/8 G1/8 G1/4 G3/8
Operating medium Compressed air to ISO 8573-1:2010 [7:4:4]
Note on the operating medium Lubricated operation possible (in which case lubricated
operation will always be required)
Operating pressure P [bar] 3 … 8 –
Y9/Y10/Y14 [bar] 2 … 10
Mounting position Any
Swivel angle [°] 180
Setting range on
both sides
P [°] Infinitely adjustable between –100 … +10 –
Y9/Y10/Y14 [°] Infinitely adjustable between –100 … +101)
Cushioning angle
(Zminimum swivel
angle)
P [°] 32 36 45 33 33 36 23 –
Y9/Y10/Y14 [°] 48 43 72 79 82 85 56 61 48
Repetition accuracy [°] 0.03 0.05 0.03
Ambient temperature [°C] –10 … +60
Torque at 6 bar (theor.) [Nm] 0.8 1.59 2.41 5.15 10.1 15.8 24.1 53.0 112
Max. axial load (static) [kN] 1.43) 1.5 2.4 2.4 3.75 6.1 6.1 9.0 11.0
Max. permissible axial and
radial force on drive shaft
Dependent on the distance of the force application point
(èwww.festo.com/catalogue)
Max. permissible mass moment
of inertia
Depending on the product type
(èwww.festo.com/catalogue)
End-position adjustment By turning the cushioning components
Note on materials Contains paint-wetting impairment substances (PWIS)
Materials
Housing, cover Anodised aluminum
Shaft, screws, plug and
retaining plate for DRRD-12
Steel
Seals TPE-U (PU), NBR
Product weight2) P [kg] 0.38 0.64 0.84 1.35 2.82 4.51 6.07 –
Y9/Y10/Y14 [kg] 0.39 0.65 0.88 1.36 2.98 4.78 6.42 11.3 19.1
1) Reduction possible on one side 100°; observe the cushioning angle as the minimum swivel angle
2) Basic design with internal cushioning, without accessories
3) Pressure load (tensile load: 0.33 kN)
4) With DRRD-32, Y10 is not available
Tab. 9

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Copyright:
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
Phone:
[phone]
Fax:
[phone]
E-mail:
[e-mail]
Internet:
www.festo.com