Toothed belt axis EGC-TB-KF, EGC-HD-TB - festo.com€¦ · Festo – EGC-TB-KF, EGC-HD-TB –...

en Operating

instructions

8076268

2017-11c

[8076270]

Toothed belt axis

EGC-TB-KF, EGC-HD-TB


2 Festo – EGC-TB-KF, EGC-HD-TB – 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


Festo – EGC-TB-KF, EGC-HD-TB – 2017-11c English 3

English – Toothed belt axis EGC-TB-KF, EGC-HD-TB

Table of contents

1 Control sections and connections 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Function and application 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Transport and storage 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Requirements for product use 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Installation 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 Mechanical assembly 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1.1 Mount axis 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1.2 Installation of the effective load 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1.3 Installing external accessories 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Commissioning 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Operation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8 Maintenance and care 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9 Repair 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 Accessories 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11 Troubleshooting 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12 Technical data 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13 Characteristic curves 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


4 Festo – EGC-TB-KF, EGC-HD-TB – 2017-11c English

Documentation on the product

For all available product documentation � www.festo.com/pk

1 Control sections and connections

EGC-...-TB-KF EGC-HD-...-TB

1 3 42 5 6 7

8

9

aJ

aAaBaC aC aB aA

aJ

9

1 Thread and centring holes for foot mounting

2 Cover cap

3 Drive hollow shaft

4 Thread for motor mounting kit

5 Guide rail (2x with EGC-HD-...-TB)

6 Thread and centring holes for mounting the

effective load

7 slide

8 Surface for profile mounting

9 Thread for optional switch lug

(with EGC-HD-...-TB, both sides)

aJ Groove for proximity switch

(with EGC-HD-...-TB, both sides)

aA Grooves for slot nut mounting and

accessories

aB Relubrication opening (both sides,

2x�EGC-...-TB-KF, 4x�EGC-HD-...-TB)

aC Toothed belt

Fig. 1



2 Function and application

A toothed belt on a drive hollow shaft 3 converts the rotation of a motor into a linear movement. The

slide 7 then moves backwards and forwards.

The slide is bearing mounted. The reference position of the slide can be detected using proximity

sensors in the slots aJ.

The EGC-...-TB-KF toothed belt axis is intended to be used to quickly

position effective loads with large dimensions. It is approved for

slide operating mode.

The EGC-...-TB-KF and EGC-HD-...-TB are not approved for operating

conditions in which vegetable water-soluble greases or oils could

penetrate into the axis.

Fig. 2

Note

The EGC toothed belt axis is not braked: If the input torque is not applied, the slide is

freely movable.

Generally self-locking of the complete system can be achieved with motors with an

integrated spring-loaded holding brake or with high self-braking torque (e.g. for vertical

operation).

� Please select the corresponding motors from our catalogue

(� www.festo.com/catalogue).

You will then be operating a mated pair, which are especially adapted to each other.

When using other motors:

� Observe the limit values for forces, torques and speeds

(� 12 Technical data and 13 Characteristic curves).

3 Transport and storage

� Take the product's weight into account. Depending on the version, the EGC can weigh up to 350 kg.

For transport, the transport belts must be positioned at the permissible support distances

(support distances � 13 Characteristic curves).

� Ensure the following storage conditions:

– Storage times should be kept to a minimum

– cool, dry, shaded, corrosion-protected storage locations

– no oils, greases or grease-dissolving vapours.

In this way you ensure the performance of the toothed belt.



4 Requirements for product use

Warning

Unexpectedly fast moving masses can harm people or property items (crushing).

� Apply power to the drive motor, at first limited to low speeds and torques.

Note

Malfunctions will occur if the device is not used correctly.

� Make sure that the specifications contained in this chapter 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 (��12 Technical data).

� Use the product in its original status, without any unauthorised modification.

� Take into consideration the environmental conditions at the location of use.

Corrosive environments reduce the service life of the product (e.g. ozone).

� Compare the limit values in these operating instructions with those of your application (e.g. forces,

torques, temperatures, masses, speeds).

Only if the load limits are observed is it possible to operate the product in compliance with the rel

evant safety regulations.

� 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.

Exception: Direct request to do so in these operating instruc

tions.

� Mount the motor onto the axis in accordance with the assembly

instructions for the motor mounting kit recommended in the

catalogue.

Fig. 3

5.1.1 Mount axis

Requirements

� Position the product in such a way that its control sections are accessible (e.g. relubrication open

ings).

� Make sure that the mounting components are outside the positioning range of the slide.

� Install product without tension or distortions.

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

the stoke length, but max. 0.5 mm.

For gantry applications, attention must also be paid to parallel

alignment or product heights in alignment of the axes.

For additional information, contact your local Festo Service.

� Take the required support spacing into account

(� 13 Characteristic curves).

Fig. 4

� Attach the EGC (��Tab. 1).



Interfaces for mounting components

on the cover on the profile

e.g. with foot mounting HPE1)

(only for EGC-...-TB-KF)

e.g. with slot nuts NST1) e.g. with profile mounting MUE1)

1) � www.festo.com/catalogue

Tab. 1

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 are heavy loads, mount the axis to the profile with additional mounting

components.

� Tighten the mounting screws evenly with the following tightening torque.

Size 50 70 80 120 185

Screw (cover) M4 M5 M5 M8 M10

Tightening torque [Nm] 2.9 5.9 5.9 24 47

Tab. 2

For installation in a vertical or inclined position:

Warning

Injury to people and material damage!

If there is a power failure or if the toothed belt

breaks, the work load will slide down.

� Make sure that you only use motors with an

integrated spring-loaded holding brake. Fig. 5

� Check whether additional external safety measures against damage due to breaking

of the toothed belt are required (e.g. toothed latches, moving bolts or emergency

buffers).



5.1.2 Installation of the effective load

� Place the effective load so that the tilting torque resulting from

force F (parallel to the axis of motion) and lever arm “a” remains

low.

Fig. 6

a F

� Fasten the effective load to the slide with the screws and cent

ring sleeves.

� Make sure that the maximum screw-in depth D is adhered to.

Fig. 7

Size 50 70 80 120 125 160 185 220

Screw (side/top) M4 M5 M5/M6 M5 M6 M6/M8 M6

Max. screw-in depth D [mm] 4.2 8.4 9.5 10 8.4 9.5 15 10

Centring (H7) [mm] 5 5 7/9 5/9 9 9 9

Tightening torque [Nm] 2.9 5.9 5.9/9.9 5.9 9.9 9.9/24 9.9

Tab. 3

Effective loads with own guide:

� Adjust the guides of the effective load and of the EGC so that they are exactly parallel.

You will then avoid overloading the guide and increased wear.

With hard and stiff effective loads (e.g. steel):

Note

If the aluminium slide becomes bent against a curved

effective load, the service life of the guide will be re

duced.

� Make sure that the mounting surface of the

effective loads is even to within t�=�0.01 mm.

If additional slides are used, possible differences in

height must be compensated for. Fig. 8

t

Effective loads projecting in the longitudinal direction of the slide:

� Make sure that the effective load does not strike against the

motor.

Fig. 9



5.1.3 Installing external accessories

To protect the end positions against uncontrolled overrunning:

� Check whether proximity sensors are required (hardware limit switches).

If proximity sensors are used as limit switches:

� Preferably use proximity switches with normally-closed function.

These will protect an EGC with a fractured proximity switch cable from overrunning the end position.

If proximity switches are used as reference switches:

� Use proximity switches that correspond to the input of the controller being used.

� Use inductive proximity switches with switch lug aE (� assembly instructions of the accessory

used).

Mounting

in the grooves aJ (� Fig. 1) with mounting bracket aD

aJ

aEaD

aE

Tab. 4

� Avoid external influence caused by magnetic or ferrite parts in the vicinity of the proximity switches

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

To protect the end positions:

� Use emergency buffer or shock absorber (� Assembly instructions of the accessory used).

To avoid contamination:

� Use slot covers in all unused grooves.



6 Commissioning

Warning

Moving masses can cause personal injury or dam

age to material items (crushing).

� Make sure that, in the positioning 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.

It should not be possible to touch the EGC until

the mass has come to a complete standstill.

Fig. 10

Note

Incorrect specification values of the braking ramp in STOP statuses

(e.g. EMERGENCY OFF, Quick Stop) result in an overloading of the linear axis and can

destroy it or drastically reduce the 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 linear axis used is not ex

ceeded.

� Use the “PositioningDrives” design software to design the linear axis

(� www.festo.com).

Note

Block-shaped acceleration profiles (without smoothing) cause high peaks in the drive

force that can lead to overloading of the drive. In addition, positions outside the per

missible range may occur as a result of overswing effects. A jolt-limited acceleration

specification reduces vibrations in the entire system and has a positive effect on stress

in the mechanical system.

� Check which closed-loop controller settings can be adapted (e.g. jerk limitation,

smoothing of the acceleration profile).

Note

The elasticity of the toothed belt delays the acceleration behaviour of the EGC and res

ults in larger accelerations than are set on the controller (spring effect).

� Take into account possible deviations from the acceleration set at the controller.



Check travel Homing run Test run

Determining the approach direc

tion of the motor

Comparison of the real situation

with the figure in the controller

Checking the overall behaviour

Tab. 5

1. Start check travel with low dynamic response.

In spite of equal control, motors of the same design sometimes turn in the opposite direction due to

different wiring.

2. Start homing in accordance with the operating instructions for your motor drive system with low

dynamic response to the reference switch.

The homing run may only take place toward the reference switch.

3. Start a test run with low dynamic response.

4. Check whether the EGC fulfils the following conditions:

– The slide runs through the complete intended positioning cycle.

– The slide stops as soon as it reaches a limit switch.

7 Operation

Warning

Moving masses can cause personal injury or damage to material items (crushing).

� Make sure that, in the positioning range

– nobody can place his/her hand in the path of the moving components

(e.g. through protective guards)

– there are no foreign objects.

It should not be possible to grasp the EGC until the mass has come to complete rest.

Note

The reference position is lost when the motor is dis

mounted (e.g. turning of the motor).

� Start homing (� 6 Commissioning) in order to de

termine the new reference position.

Fig. 11



8 Maintenance and care

Warning

Uncontrolled moving masses can cause injury to people or damage to property (squeez

ing). If a toothed belt breaks in combination with a vertically or diagonally installed EGC,

the work mass will fall down.

� In case of signs of wear, return the EGC to Festo for repairs.

Controller signals can cause the EGC to make unintended movements.

� Switch off the controller for all maintenance work on the EGC and secure it to pre

vent it from being restarted unintentionally.

On cleaning and maintenance:

� If required, clean the guide axis with a soft cloth. All media gentle to the material may be used as

cleaning agents.

Note

The lubrication interval Sint is dependent on the product load.

� Cut the lubrication interval Sint (� Fig. 12) in half if the following situations are

present:

– dusty and dirty environment

– nominal strokes 2000 mm

– at speeds 2 m/s

– positioning profile Z delta operation (frequent acceleration and braking)

– ambient temperatures 40 °C

– product has been in operation for 3 years.

If several situations occur simultaneously, the lubrication interval must be divided by

four.

� Grease the following components:

Bearing guide Guide rail

Lubricating point (� Fig. 1) Relubrication opening aB Surface 5

Lubrication interval (� Fig. 12) As required 1)

Grease 2) Roller bearing grease

1) or if the component no longer has a layer of grease

2) Grease gun, blast pipe and grease (��10 Accessories)

Tab. 6



For greasing the bearing guide (not possible for

EGC-...-GP/GQ):

1. Calculate the load comparison factor fv with

the aid of the formula for combined loads

(� 12 Technical data) and determine the lub

ricating interval Sint from it (� Fig. 12).

Fig. 12

fv

2. Grease the bearing guide on both sides at all

relubrication openings�aB.

3. Move the slide over the complete travel dis

tance during lubrication in order to distribute

the grease equally inside.

Fig. 13aB

9 Repair

Note

Retensioning of the toothed belt reduces its service life considerably. In addition, the

technical data, e.g. the feed constant, change.

� Make sure that the toothed belt is not retensioned.

The toothed belt is pretensioned so that it does not have to be retensioned during

its service life.

� Recommendation: Send the EGC to our repair service.

This way the fine tuning and tests that are required will be taken into particular consideration.

� Information about spare parts and auxiliary means can be found at:

(� www.festo.com/spareparts).



10 Accessories

Designation Part number/type

Grease gun with needle-pointed nozzle

Nozzle, outlet axial

Nozzle, outlet radial

647958/LUB-1 1)

647959/LUB-1-TR-I 1)

647960/LUB-1-TR-L 1)

Roller bearing grease LUB-KC1 from Festo 1)

1) (� Spare-parts catalogue at www.festo.com/spareparts)

Tab. 7

11 Troubleshooting

Malfunction Possible cause Remedy

Squeaking

noises, vibrations

or the axis is not

running smoothly

The coupling is moun

ted too tight

Comply with the permissible coupling spacing

dimensions

(��assembly instructions of the motor mounting kit)

Distortions Fit the EGC free of tension (evenness of the bearing

surface: ��5 Installation)

Align the EGC so that it is exactly parallel to the second

axis

Grease the EGC (��8 Maintenance and care)

Modify travel speed

Incorrect regulator set

tings

Change the regulator parameters

Roller bearing/bearing

guide defective

Send EGC to Festo for repair

Toothed belt worn Send EGC to Festo for repair

Slide does not

move

Coupling hub slipping Check mounting of motor mounting kit

(��assembly instructions of the motor mounting kit)

Loads too high Reduce mass of the effective load/travel speed

Mounting screws for

effective load too long

Observe max. screw-in depth

(��5.1.2 Installation of the effective load)

Slide travels bey

ond the end posi

tion

The proximity switches

do not react

Check the proximity switches, connections and con

troller

Toothed belt

jumps off

Toothed belt preten

sioning too low

Send EGC to Festo for repair

(��9 Repair)

Incorrect regulator set

tings

Change the regulator parameters

Tab. 8



12 Technical data

Size 1) 50 70 80 120 125 160 185 220

Design Electromechanical axis with toothed belt

Guide Recirculating ball bearing guide

Mounting position Any

Max. feed force Fx [N] 50 100 350 800 450 1000 2500 1800

Max. driving torque [Nm] 0.46 1.24 5 16 7.3 19.9 93 59.6

Max. no-load driving

torque 2)

[Nm] 0.072 0.18 0.4 1.4 0.5 2.1 4.05 4.1

Max. speed [m/s] 3 5 3 53)

Max. acceleration [m/s2] 50 40 50

Repetition accuracy [mm] ±0.08 ±0.1

Feed constant [mm/rev.] 58 78 90 125 102 125 232 208

Ambient temperature [°C] –10 … +60

Protection class IP40

1) The following tool is available for sizing: PositioningDrives design software (� www.festo.com)

2) Measured at a speed of 0.2 m/s

3) For variant GP with BG160/220: max. speed 3 m/s

Tab. 9



EGC-...-TB-KF

Size 50 70 80 120 185

Maximum permitted forces on the slide

Fy = Fz [N] 650 1850 3050 6890 15200

Maximum permitted torques on the slide

Mx [Nm] 3.5 16 36 144 529

My = Mz

(EGC-GK, EGC-GP)

[Nm] 10 51 97 380 1157

My = Mz

(EGC-GV, EGC-GQ)

[Nm] – 132 228 680 1820

Condition for combined loads:

fv �|Mx|

Mxmax�

|My|

Mymax�

|Mz|

Mzmax�

|Fy|

Fymax�

|Fz|

Fzmax� 1

Materials

Profile, cover, slide Anodised aluminium

Ball bearing, guide, screws Steel

Cover caps Polyacetal

Toothed belt Fibreglass-reinforced polychloroprene

Buffer Nitrile rubber

Sealing disc Acrylic butadiene styrene

Weight

0-stroke [kg] 0.62 1.85 3 10.5 32.6

per 100 mm stroke [kg] 0.19 0.44 0.62 1.5 3

Tab. 10



EGC-HD-...-TB

Size 125 160 220

Maximum permitted forces on the slide

Fy = Fz [N] 3650 5600 13 000

Maximum permitted torques on the slide

Mx [Nm] 140 300 900

My = Mz [Nm] 275 500 1450

Condition for combined loads:

fv �|Mx|

Mxmax�

|My|

Mymax�

|Mz|

Mzmax�

|Fy|

Fymax�

|Fz|

Fzmax� 1

Materials

Profile, cover, slide Anodised aluminium

Ball bearing, guide, screws Steel

Cover caps Polyacetal

Toothed belt Fibreglass-reinforced polychloroprene

Buffer Nitrile rubber

Sealing disc Acrylic butadiene styrene

Weight

0-stroke [kg] 4.72 9.05 25.51

per 100 mm stroke [kg] 0.73 1.07 2.1

Tab. 11



13 Characteristic curves

Maximum permissible support span L as a function of the force F for EGC-...-TB-KF

L L

EGC-50

EGC-70

EGC-80

EGC-120

EGC-185

EGC-50

EGC-70

EGC-80

EGC-120

EGC-185

Fig. 14



Maximum permissible support span L as a function of the force F for EGC-HD-...-TB

L L

EGC-HD-125

EGC-HD-160

EGC-HD-220

EGC-HD-125

EGC-HD-160

EGC-HD-220

Fig. 15


Festo – EGC-TB-KF, EGC-HD-TB – 2017-11c 21

Reproduction, distribution or sale of this document or communication of its contents to others without express authorization isprohibited. Offenders will be liable for damages. All rights reserved in the event that a patent, utility model or design patent isregistered.

Copyright:Festo AG & Co. KGRuiter Straße 8273734 EsslingenGermany

Phone:+49 711 347-0

Fax:+49 711 347-2144

E-mail:[email protected]

Internet:www.festo.com

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