Festo ERMB Manuale utente

(en) Operating

instructions

Rotary module

ERMB

8103858

2018-12a

[8103860]

ERMB

Festo ERMB 2018-12a

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

ERMB

Festo ERMB 2018-12a English 3

Rotary module ERMBEnglish

Contents

1 Operating parts and connections 4................................

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

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

4 Conditions of use 6.............................................

5 Fitting 7......................................................

Fitting mechanical components 7..................................

Fitting electric components 9.....................................

Fitting electric components 10.....................................

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

Commissioning – carrying out 12...................................

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

8 Care and maintenance 13.........................................

9 Repairs 13.....................................................

10 Accessories 14..................................................

11 Eliminating faults 14.............................................

12 Technical specifications 15.......................................

Characteristic curves 17..........................................

ERMB

Festo ERMB 2018-12a English

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

1 Operating parts and connections

235641

Fig. 1

891 aJ

1Centring holes and threaded holes for

fastening (on 6 sides)

2Drive shaft (hollow shaft) with thread for

accessories, rear side

3Threaded holes for kits for connecting

the motor

4Drive shaft

5Drive shaft with centring holes and

threaded holes for work load, front

6Threaded hole for proximity switch

(covered)

7Toothed belt tension pulley with locking

screw for service personnel

8Through hole for fastening

9Marking hole on connector ring for switch

ing cam lying behind

aJ Holes for service personnel

ERMB

Festo ERMB 2018-12a English 5

2 Function and application

A toothed belt transfers the rotary movement of a motor to a hollow shaft.

The shafts have ball bearings. The reference position of the hollow shaft can

be scanned with the aid of an inductive proximity switch in the threaded hole 6.

The rotary module type ERMB is intended for turning work loads (e. g. with

grippers). The ERMB is not permitted for application conditions in which vegetable

and water-soluble greases or oils can penetrate into the axis. Vegetable greases or

oils can reduce the capacity of the toothed belt.

Note

The ERMB is not fitted with a brake. When the input torque is not applied,

the rotary module can be moved freely. Generally self-locking of the complete

system can be achieved with motors with integrated holding brake or with high

self-braking torque.

SUse the motors specified in the Festo (ècatalogue.

www.festo.com/catalogue).

You will then be operating two devices which are especially matched to each

other.

When using other motors:

SObserve the maximum values for torques and speeds èchapter “12 Technical

specifications.”

SNote the interface geometries (e.g. for the drive shafts) ècatalogue

specifications under www.festo.com/catalogue

3 Transport and storage

STake into account the weight of the rotary module. Depending on the design

the ERMB can weigh up to 3.3 kg.

SEnsure storage conditions as follows:

– Storage times should be kept to a minimum

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

ERMB

Festo ERMB 2018-12a English

4 Conditions of use

Warning

Uncontrolled moving masses can cause in

jury to people or damage to property

(danger of fingers being squashed).

SApply power to the drive motor, at first

limited to low speeds and torques.

Note

The positioning times and permitted mass moments of inertia on the drive

depend to a large extent on the flange-mounted motor.

SUse the design tool “Positioning Drives” from Festo for ascertaining the

optimum combination of the products (èwww.festo.com).

Make sure that the following specifications are observed:

SCompare the maximum values specified in these operating instructions with

those of your actual application (e.g. forces, torques, temperatures, masses,

speeds).

The product can only be operated in compliance with the relevant safety

regulations if the maximum loading limits are observed.

STake into consideration the ambient conditions at the location of use.

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

SPlease comply with national and local safety laws and regulations.

SRemove transport packaging such as foils (polyethylene) and cardboard.

The packing is intended for recycling (except for: oiled paper = other waste).

SUse the product in its original state. Unauthorised modification is not per

mitted.

STake the tolerance of the tightening torques into consideration. Without

special specification the tolerance is ±20 %.

Fig. 2

ERMB

Festo ERMB 2018-12a English 7

5 Fitting

Fitting mechanical components

SDo not modify the settings of screws and threaded pins if there is no request to

do this in these operating instructions.

SFit the motor onto the rotary module in

accordance with the assembly instruc

tions for the kit recommended in the cata

logue.

Fitting the product:

Note

External stops can cause the toothed belt to tear due to excessive forces.

SUse only the motor controller for braking the ERMB.

SPosition the ERMB so that all the operating parts are accessible.

SFasten the ERMB with 4 screws and

2 centring sleeves (diagonal) or with the

aid of kits to the threaded holes 1or 8.

Fastening is possible on all six side sur

faces.

Fig. 3

Fig. 4

ERMB

Festo ERMB 2018-12a English

STighten the fastening screws evenly.

Observe the max. screw-in depth D on the base surface (èFig. 5).

ERMB-... 20 25 32

Tightening

torque

[Nm] 2.9

5.9

–

5.9

9.9

–

5.9

9.9

Max. screw-

in depth D

[mm] 10

Centring

sleeves

[mm] Dia. 9x4

Fig. 5

Eccentric loads fitted in a vertical or sloping position:

Warning

Uncontrolled moving masses can cause

injury to people or damage to property

(danger of fingers being squashed).

If there is a power failure or if the toothed

belt breaks inside the ERMB, the work load

will slide down.

SMake sure that the ERMB is driven only

by motors with an integrated spring-

loaded holding brake.

SCheck whether external safety measures

against damage due to toothed-belt frac

ture are necessary (e.g. toothed latches

or moving bolts).

In this way you can prevent the work

load from sliding down.

Fig. 6

ERMB

Festo ERMB 2018-12a English 9

Fitting the work load

SPlace the centre of gravity of the work

load if possible centrically to the drive

shaft.

SFasten the work load to the drive shaft

with at least 2 screws and 2 centring

sleeves (diagonal) or with the aid of kits.

ERMB-... 20 25 32

Screw M4 M6 M6

Tightening

torque

[Nm] 2.9 9.9 9.9

Max. screw-

in depth E

[mm] 9.6 12 12

Centring

sleeves

[mm] dia.

7x3

dia.

9x4

dia.

9x4

Fig. 8

Fitting electric components

Fitting an inductive proximity switch as reference switch:

1. Turn the drive shaft until the marking

hole (A) reaches the threaded hole 6.

2. Push the clamping element (C) into the

recess intended for this.

3. Screw the proximity switch (D):

– at first into the hole 6until it touches

the switching cam (B).

– then unscrew it approx. 0.6 of a turn

(o0.6 mm).

4. Screw the threaded pin (ß2.5) into the

clamping unit (C). The tightening torque

is 0.8 Nm.

Fig. 7

Fig. 9

(A)(B)

(C)

(D)

ERMB

Festo ERMB 2018-12a English

SCheck whether additional proximity switches are necessary. The scanning kit

can be used for this purpose in accordance with the section on Accessories

(ècatalogue specifications, www.festo.com/catalogue).

Turning the switching ring (E)

SScrew the switching ring with a pin into

the hole (A) as far as is desired (90° latch

ing). The drive shaft 2must be used here

as a counter hold.

Turning the holding ring (F)

Note

If the holding ring is loosened, the drive

shaft may be drawn out of the ERMB due

to excessive axial forces.

SAvoid axial forces when the holding ring

is loose.

SUnscrew:

– The 4 fastening screws out of the holding ring (F).

– Screw the holding ring into the desired position (note permitted swivel

angle).

– Screw the 4 fastening screws into the holding ring again.

The permitted swivel angle and tightening torques are as follows:

ERMB-... 20 25 32

Permitted swivel angle [°] 180 90/180/270 90/180/270

Tightening torque [Nm] 2.9 2.9 5.9

Fig. 11

Fitting electric components

Note

If used in safety-relevant applications additional measures are necessary. In

Europe, for example, the EU machine guideline standards must be observed.

Without additional measures in accordance with legally specified minimum

requirements, the product is not suitable as a safety relevant component in

control systems.

Fig. 10

(E)

(F)

(A)

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