Festo EPCO-16 User manual

en Operating
instructions
8076277
2017-11c
[8076279]
Electric cylinder
EPCO

EPCO
2Festo – EPCO – 2017-11c
Translation of the 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 – Electric cylinder EPCO
Table of contents
1 Operating elements and connections 4.........................................
2 Function and application 4...................................................
3 Transport and storage 5.....................................................
4 Prerequisites for use 5......................................................
5 Installation 6..............................................................
5.1 Mechanical assembly 6......................................................
5.2 Electrical installation 8.......................................................
5.3 Installing circuitry 9.........................................................
6 Commissioning 10...........................................................
7 Operation 12...............................................................
8 Maintenance and care 12.....................................................
9 Repair 13..................................................................
10 Accessories 13..............................................................
11 Troubleshooting 13..........................................................
12 Technical data 14............................................................
12.1 Mechanical data 14..........................................................
12.2 Electrical data 16............................................................
13 Characteristic curves 17......................................................

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Documentation on the product
For all available product documentation èwww.festo.com/pk
1 Operating elements and connections
EPCO-16 EPCO-25/40
67543211 3
1Motor/holding brake connection
2Piston rod (propulsive tube)
3Encoder connection
4Cylinder housing
5Internal thread for fastening
6Wrench flats for counter holding
7Groove for mounting
Fig. 1
2 Function and application
A rotating ball screw converts the rotary movement of a motor into a linear movement. This moves the
piston rod 2backwards and forwards.
The piston rod is guided in a non-rotating manner. The position of the piston rod can be optionally quer
ied as follows:
– EPCO-...ST-E: by using an integrated, incremental positional transducer after a homing run
– EPCO-...ST: enables open-loop operation (without positional transducer and without positional
feedback)
– EPCO-...-A: with an integrated ring magnet and optional proximity sensors.
The EPCO electric cylinder is designed for accurately positioning effective loads in combination with the
CMMO-ST or CMMS-ST controller (permissible controllers è10 Accessories).

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The device is intended for use in an industrial environment. Measures may need to be implemented in
residential areas for interference suppression.
Note
The EPCO is non-braking. When the supply voltage is not applied, the piston rod can be
moved freely. Automatic locking of the complete system can be optionally achieved with
a holding brake in the EPCO-...-ST-B.
3 Transport and storage
 Consider the weight of the electric cylinder.
Depending on the version, the EPCO can weigh up to 5 kg.
 The following should be observed with regard to storage:
– Storage times should be kept to a minimum
– Store in cool, dry, well-shaded locations that do not present a risk of corrosion.
4 Prerequisites for use
Warning
Unexpectedly fast-moving masses can harm people or property (risk of crushing).
 Initially, only apply limited power to the drive motor to ensure low speeds and
torques.
Note
Malfunctions will occur if the device is not used correctly.
 It is vital that the stipulations contained in this section are adhered to at all times.
 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 foils, caps and cardboard.
The material used in the packaging is intended for recycling (exception: oil paper = residual
waste).
 Observe the local regulations for environmentally friendly waste management of electronic compon
ents.
 Take into account the material specifications (èTechnical data chapter).
 Use the product in its original state, without any unauthorised product modifications.
 Take into consideration the ambient conditions at the location of use.
Corrosive environments reduce the service life of the product (e.g. ozone).

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 Compare the limit values specified in these operating instructions with those of your application
(e.g. forces, torques, temperatures, masses, speeds). The relevant safety regulations can only be
adhered to by ensureing the product is operated in compliance with the load limits.
 Take the tolerance of the tightening torques into account. Unless otherwise specified, the tolerance
is ±20 %.
5 Installation
5.1 Mechanical assembly
 Do not modify the screws and threaded pins if not directly requested to do so in these operating
instructions.
Note
Excessive tensile loads may cause the threaded holes to be pulled out.
 In the event of high loads make sure that the EPCO is secured at other mounting
points in the grooves 7in addition to the front mounting threads 5.
 Make sure that the device is fitted free of mechanical stress
and distortion (evenness of the bearing surface: ≤ 0.2 mm).
 Position the EPCO so that all of the control sections are
accessible.
 Secure the EPCO with the mounting accessories
(è10 Accessories).
 Tighten the screws evenly.
Fig. 2
57
Size 16 25 40
Direct mounting 5
Female thread front side M4 M5 M6
Max. tightening torque [Nm] 3 4 5
Slot nut mounting 7
Spanner Size ß2.5 2.5 4
Max. tightening torque [Nm] 1.2 1.2 5.9
Tab. 1

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Fitting in a vertical or sloping position:
Warning
Uncontrolled moving loads can cause personal
injury and material damage (risk of crushing).
If a spindle nut fracture occurs inside the EPCO,
the loads will slide down.
 Check whether additional external safety
measures to protect against spindle nut frac
ture are necessary (e.g. toothed latches or
moveable bolts). In this way you can prevent
the load from sliding down.
Fig. 3
Installing the effective load
 Place the centre of gravity of the effective load, if possible,
centrally to the piston rod.
 When securing the effective load make sure that no torque
is transferred to the piston rod.
The wrench flat 6can be used to exert counter pressure.
 Secure the effective load to the piston rod.
The piston rod will bend depending on the effective load
(èAppendix 13 Characteristic curves). Fig. 4
6
Size 16 25 40
Piston rod thread
Male thread (EPCO-...) M6 M8 M10x1.25
Female thread (EPCO-...-F) M4 M6 M8
Spanner Size 6 ß 7 9 10
Tab. 2

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Installation of external accessories
To protect the end positions against uncontrolled overrunning:
 Check whether proximity sensors are necessary (as safety limit switches or hardware limit
switches). This is only possible for the EPCO-...-A with integrated magnet.
If proximity switches (sensors) are used:
 Use proximity sensors with normally-closed function.
These protect the EPCO from overrunning the end position if the proximity sensor cable is fractured.
 To mount the proximity sensors use a mounting kit or a sensor
rail (è10 Accessories). These are bonded directly to the cylin
der profile (èAssembly instructions for the accessories).
 Avoid external influences from magnetic or ferritic parts in the
vicinity of the proximity sensors (minimum distance of 20 mm
from ferritic parts).
Fig. 5
5.2 Electrical installation
Warning
If the piston rod is moved externally, open, dangerous voltages may occur across the
electrical connections (generator principle).
 Make sure that the piston rod is only moved with wired connections.
Note
If unused plug connectors are touched, there is a danger that damage may occur to the
EPCO or to other parts of the system as a result of ESD (electrostatic discharge). Place
protective caps on unused terminals to prevent such discharges.
Note
To maintainEMC security:
The maximum length of the individual connection cables must not exceed 30 m.
1. Make sure the controller is switched off and that it is prevented from being restarted. Cancelling the
enable signal on the controller is not sufficient.
2. Connect the motor on the EPCO completely to the controller as shown in the following tables. The
pre-assembled cables from Festo (è10 Accessories) offer sufficiently large cable cross sections as
well as screening of the motor/encoder cable with earth contact on both sides.

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Motor connection/holding brake: round plug (8-pin)/D-sub plug connector (9-pin) 1
Pin Allocation EPCO-16 EPCO-25/40
1String A
2String A/
3String B
4String B/
5 n.c.
6 n.c.
7Holding brake +24 V1)
8Holding brake GND1)
9 n.c.
1) Only for motors with holding brake EPCO−...−ST-B
Tab. 3
Encoder connection: round plug (8−pin) 22)
Pin Allocation EPCO-16 EPCO-25/40
1Signal trace A
2Signal trace A/
3Signal trace B
4Signal trace B/
5GND encoder
6Signal trace N
7Signal trace N/
8VCC auxiliary supply 5 V3)
2) Only for motors with encoder EPCO−...−ST-E
3) Short circuit proof, max. load 100 mA
Tab. 4
5.3 Installing circuitry
Note
Additional measures are necessary if used in safety relevant applications, e.g. in Europe
the standards listed under the EC machinery directive must be observed. Without
additional measures in accordance with statutory minimum requirements, the product
is not suitable for use in safety-related sections of control systems.

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6 Commissioning
Warning
Moving masses can cause personal injury and
material damage (risk of crushing).
 Make sure that, in the travel range,
– nobody can place his/her hand in the path
of the moving components (e.g. through a
protective guard),
– there are no foreign objects in the path of
the moving components
It should not be possible to touch the EPCO
until the mass has come to a complete stand
still.
Fig. 6
Note
The motor can unexpectedly be started if the brake is released. Depending on the type
of device, the controller will unlock the holding brake automatically.
 Before releasing the holding brake, make sure that the EPCO cannot move
unexpectedly.
 Complete the commissioning of the motor in conjunction with the controller in
accordance with the controller manual.
Note
Incorrect set values for the braking ramp in STOP statuses (e.g. EMERGENCY OFF, Quick
Stop) result in an overloading of the spindle axis and can destroy it or drastically reduce
its service life.
 Check the settings for all braking ramps in your controller or the higher-order control
system (deceleration values and jerk).
 Taking the travel speed, moving mass and mounting position into account, make
sure that the delay values (brake delay and time delays) are set in such a way that
the maximum actuation moment or feed force of the spindle axis used is not
exceeded.
 To design the spindle axis use the Festo sizing software PositioningDrives
(èwww.festo.com).