Festo ELFA-KF Series Bedienungsanleitung

Operating

instructions

8113434

2019-05d

[8113436]

Guide axis

ELFA-KF/-RF

2 Festo – ELFA-KF/-RF – 2019-05d

Translation of the original instructions

Identification of hazards and instructions on how to prevent them:

Danger

Immediate dangers which can lead to death or serious injuries

Warning

Hazards that can cause death or serious injuries

Caution

Hazards that can cause minor injuries

Other symbols:

Note

Material damage or loss of function

Recommendations, tips, references to other documentation

Essential or useful accessories

Information on environmentally sound usage

Text designations:

 Activities that may be carried out in any order

1. Activities that should be carried out in the order stated

– General lists

èResult of an action/References to more detailed information

ELFA-KF/-RF

Festo – ELFA-KF/-RF – 2019-05d English 3

English – Guide axis ELFA-KF/-RF

Table of contents

1 Configuration 20............................................................

2 Safety 20..................................................................

2.1 Intended use 20.............................................................

2.2 General safety information 21..................................................

2.3 Mounting and connecting 21...................................................

2.4 Qualification of specialized personnel 21.........................................

3 Function 21................................................................

4 Transport 22...............................................................

5 Installation 22..............................................................

5.1 Mechanical installation 22.....................................................

5.1.1 Mounting the axis 23.................................................

5.1.2 Mounting attachment components 24...................................

5.1.3 Mounting accessories 25.............................................

6 Commissioning 26...........................................................

7 Maintenance and care 26.....................................................

8 Disassembly and repair 28....................................................

9 Disposal 28................................................................

10 Accessories 29..............................................................

11 Fault clearance 30...........................................................

12 Technical data 31............................................................

13 Characteristic curves 33......................................................

ELFA-KF/-RF

4 Festo – ELFA-KF/-RF – 2019-05d English

1 Configuration

For all available product documentation èwww.festo.com/pk

aJ12 3

1Thread/centring holes for foot mounting

2Profile housing with

– Recirculating ball bearing guide (ELFA-KF)

– Roller bearing guide (ELFA-RF)

3Thread/centring holes for attachment com

ponents

4Slide

5Cover band

6Slots for mounting/accessories

7Relubrication opening

8Thread for switch lug

9Slots for proximity sensors

aJ Sealing air connection

Fig. 1

2 Safety

2.1 Intended use

The intended use of the ELFA guide axis is to form the basic struc

ture of cantilever or gantry systems using a drive axis and a passive

guide axis. The guide axis is permitted for slide operating mode.

Fig. 2

ELFA-KF/-RF

Festo – ELFA-KF/-RF – 2019-05d English 5

2.2 General safety information

 Take into consideration the legal regulations for the respective destination.

 Only use the product if it is in its original status and in an excellent technical status.

 Use the product only within the defined values (è12 Technical data and 13 Characteristic curves).

 Take into account labelling on the product.

 Do not make any unauthorised modifications to the product.

 Observe other applicable documents.

 Take into consideration the ambient conditions at the location of use.

Protect the product from the following:

– Wetness or moisture

– Corrosive coolant or other materials (e.g. ozone)

– UV radiation

– Oils, greases and grease-solvent vapours

– Grinding dust

– Glowing chips or sparks

2.3 Mounting and connecting

 Observe tightening torques. Unless otherwise specified, the tolerance is ± 20 %.

 For ELFA-…-P0: Check the cavity in the area of the guide for foreign objects and remove these if

present.

2.4 Qualification of specialized personnel

Only qualified personnel may perform installation, commissioning, maintenance and disassembly of the axis.

The qualified personnel must be familiar with installation and operation of electrical and pneumatic control

systems.

3 Function

The slide of the ELFA guide axis supports a load so that it can move. Due to the coupling with a drive

axis (e.g. B.ELGA-TB-RF), the slide 4moves forwards and backwards. The slide is equipped with a ball

bearing guide (ELFA-KF) or roller bearing guide (ELFA-RF). An extended slide for version ELFA-RF (or an

additional slide to the left or right for version ELFA-KF) permits a higher load.

Determine the reference position of the slide as follows (è10 Accessories):

– Switch lug and proximity sensor in the slots 9

– Switch lug and proximity sensor in the sensor bracket.

ELFA-KF/-RF

6 Festo – ELFA-KF/-RF – 2019-05d English

4 Transport

Note

Unexpected movement of components. The axis is non-braking and the slide can be

moved freely.

 Secure slide during transport.

 Take product weight into account (è12 Technical data).

 Comply with maximum permitted support spacing when attaching transportation aids

(è13 Characteristic curves).

5 Installation

5.1 Mechanical installation

Prerequisites

 Do not modify the screws and threaded pins.

Exception: Direct request to do so in these operating instructions.

 Position the product in such a way that its operating elements are accessible (e.g. relubrication

openings).

 Make sure that the mounting components are outside the travel range of the slide.

 Install product without tension or distortion.

 Fasten product to a mounting surface with flatness of 0.05 % of

the stoke length, but max. 0.5 mm.

 In the case of gantry structures, attention must also be paid to

parallel alignment or product height in the alignment of the

axes.

For additional information, please contact your local Festo Service.

 Take the required support clearances into consideration

(è13 Characteristic curves).

Fig. 3

When using the ELFA guide axis in combination with a drive axis, e.g. ELGA:

 Use mounting surfaces with identical evenness for both axes.

Use the same support clearances on the drive axis as on the guide axis.

In this way you will prevent tension due to uneven flexing.

ELFA-KF/-RF

Festo – ELFA-KF/-RF – 2019-05d English 7

5.1.1 Mounting the axis

 Attach the ELFA (èFig. 4).

Interfaces for mounting components

On the cover On the profile On the profile

E.g. with foot mounting HPE1) E.g. with slot nuts NST1) E.g. with profile mounting MUE1)

1) èwww.festo.com/catalogue

Fig. 4

Note

Danger of screws being pulled out, if the axis is only mounted to the covers and

the torque load around the longitudinal axis is too great.

 If there is high loading, mount the axis on the profile with additional mounting com

ponents.

When using an ELFA guide axis in combination with an ELGA-TB/BS axis:

 Align and secure the drive axis.

Use the same support spacing/mounting points for the guide axis. The guide axis is aligned by moving

the slide to the mounting points. Mount the guide axis when the slide is located at each respective

mounting point.

If necessary, use a connection with tolerance compensation (fixed bearing/movable bearing).

In the case of gantry structures, attention must also be paid to parallel alignment or product height

in the alignment of the axes. Perform cushioning preferably on the axis with the larger payload.

 Tighten the screws on the cover:

– M5 with 5.9 Nm

– M6 with 9.9 Nm.

 In the case of mounting accessories, comply with the tightening torque specified in the associated

product information.

ELFA-KF/-RF

8 Festo – ELFA-KF/-RF – 2019-05d English

5.1.2 Mounting attachment components

Prerequisites

Note

A warped attachment component bends the slide

and shortens the service life of the guide.

 Use an attachment component with an even

surface.

Evenness: t = 0.01 mm

Fig. 5

 Position the rated load in such a way that the break-down

torque resulting from force F (parallel to the axis of motion) and

lever arm a remains as low as possible. Fig. 6

Mounting

 Fasten the attachment to the slide with screws and centring

sleeves.

 Observe maximum screw-in depth D and tightening torque

(èTab. 1).

Fig. 7

Size 70 80 120

Screw M5 M5 M6 M5 M6

Tightening torque [Nm] 5.9 5.9 9.9 5.9 9.9

Max. screw-in depth D [mm] 7.5 9.5 12.5

Centring [H7] KF [mm] 5 9

KF, RF [mm] 9

Tab. 1

ELFA-KF/-RF

Festo – ELFA-KF/-RF – 2019-05d English 9

5.1.3 Mounting accessories

To protect the end positions against uncontrolled excess travel:

 Check the necessity of proximity sensors (hardware limit switches).

If proximity sensors are used as limit switches:

 Preferably use proximity sensors with normally-closed function.

This protects against excess travel beyond the end position, if the proximity sensor cable is broken.

If proximity sensors are used as reference switches:

 Use proximity sensors that correspond to the input of the controller being used.

 Use proximity sensors with switch lug aA (èAssembly instructions for the accessory).

Mounting options for proximity sensors

in the slots 9(èFig. 1) with sensor bracket aB

aA aB

Fig. 8

 Avoid external influences from magnetic or ferritic parts in the vicinity of the proximity sensors

(minimum distance of 10 mm from the slot nuts).

 Use slot covers in all unused slots to prevent contamination (èwww.festo.com/catalogue).

Connection option for sealing air

 Connect sealing air. To do this, remove the threaded pin

(aJ èFig. 9) on the cover and connect the compressed

air/vacuum suction supply. For additional protection, use

both sealing air connections.

Fig. 9

ELFA-KF/-RF

10 Festo – ELFA-KF/-RF – 2019-05d English

6 Commissioning

Warning

Unexpected movement of components.

Injury due to impact or pinching.

 Protect the positioning range from manipulation

(e.g. with protective guards).

 Make sure that no foreign objects are present in

the positioning range.

 Carry out commissioning with low speeds and

torques.

Fig. 10

 Commission the unit following the operating instructions for the drive axis (e.g. ELGA-TB-RF).

7 Maintenance and care

WARNING

Unexpected movement of components.

Injury due to impacts or pinching.

 When working on the axis, switch off the controller and secure it to prevent it from

being switched back on unintentionally.

 For ELFA-…-P0: Check the cavity in the area of the guide for foreign objects and remove these if

present.

 Clean the axis as required with a soft cloth. Do not use aggressive cleaning agents.

Checking the cover band

 Check the cover band after every 2000 km of operating distance.

Waves on the cover band are a sign for wear of the band reverser.

 In case of wave formation, retension the cover band on both sides:

1. Loosen the threaded pins (èFig. 11).

2. Push the cover band into the cover. The cover band must not butt against the inner top side of

the slide.

3. Tension the cover band with a clamping element 5(èFig. 11).

4. Tighten the threaded pins (tightening torque: 2 Nm).

If the cover band can no longer be retensioned:

 Replace the band reversers and cover band (èwww.festo.com/spareparts).

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