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.........................................................................

DRRD-12 ... 63
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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