Operating manual ELSTRETCHER fabric tension ... - Erhardt+Leimer

Operating manual 

ELSTRETCHER fabric tension control 

system for clothing in paper machines 

with fabric tension sensor EM / PD 

and fabric tension controller DC 04../DC 24../DC 90.. 

1. Function 2 

2. Assembly 5 

3. Installation 6 

4. Setup-Editor 7 

5. Commissioning 9 

6. Operation 13 

6.1 Command station DO 200. 13 

6.2 Keys and displays 13 

6.3 Operating sequence 16 

6.4 Error messages 17 

7. Maintenance 18 

8. Repair 18 

9. Spare parts 18 

10. Technical data 18 

Component descriptions: 

Fabric tension sensor EM, PD B 

Actuator SP D 

Command station DO H 

Digital interface DI (optional) I 

Fabric tension controller DC J 

Electrical components (optional) U 

CAN bus, serial bus V 

Service manual (optional) W 

Spare parts lists X 

Parameter lists Y 

Wiring diagrams Z 

ANL--250534-EN-05 

en

Fabric tension control system ELSTRETCHER 

Explanation of symbols 

Operating manual structure 

1. Function 

1.1 Purpose 

1.2 Design 

Fabric tension controller DC 04../DC 24../ 

DC 90.. with command station DO 200. 

A page 2 ANL--250534-EN-05 

= jobs to be performed 

= important information and instructions 

= text sections due particular attention to assure the safe operation 

of the fabric tension control system. 

The E+L fabric tension control system operating manual consists of 

the general system operating manual (A), the individual descriptions 

of the components (B, C, ... W), spare parts lists (X), parameter lists 

(Y) and the wiring diagrams (Z). 

Proceed according to the instructions in the operating manual. It describes 

all the main operating procedures. If necessary, reference is 

made to the individual descriptions. 

A diagram of your system is contained in the block diagram. In the 

case of fabric tension control systems planned by E+L the block diagram 

also features the address settings. 

Explanations of the individual setup parameters may be found in 

the fabric tension controller description. Please refer to chapter 4 

"Setup editor" for procedure on how to check/change parameters. 

The ELSTRETCHER fabric tension control system is used to control 

the clothing in paper or coating machines. It corrects deviations from 

a specified fabric tension set value. 

The fabric tension control system comprises the following components: 

- one or two fabric tension sensors for detecting the fabric tension 

actual value (integrated or external fabric tension sensor) 

- fabric tension controller DC 04../DC 24../DC 90.. with command 

station DO 200. 

- one actuator (lever arm, chain or spindle type stretcher) 

optional 

- one position sensor for wrap angle compensation and/or position 

monitoring 

- one digital interface DI .... (e.g. CAN profibus) 

- felt cocking unit VM 1010 for automatic seam correction

Sensor Actuator 

External fabric tension sensor PD 72/73/74 

External fabric tension sensor PD 77 



Integrated fabric tension sensor EM 10/15 



Design 

Integrated fabric tension sensor EM 08 

Optional bearing bracket 


Lever arm type stretcher SP 0901, SP 0902 

Chain type stretcher SP 1001, SP 1002, SP 1502 

Spindle type stretcher SP 0803 

Optional position sensor 

ANL--250534-EN-05 A page 3


1.3 Operating principle 

Positioning gear 

Fabric tension control system with felt 

cocking unit VM 1010 

1.3.1 Position sensor 

(optional) 

A page 4 ANL--250534-EN-05 

The fabric tension sensors measure the fabric tension actual value of 

the moving clothing. The fabric tension may be measured with one or 

two electronic fabric tension sensors (single or two-side measuring). 

In the case of two-side measuring the fabric tension is calculated on 

the basis of the signals from both fabric tension sensors. 

In automatic operation the fabric tension controller continuously compares 

the actual fabric tension with the fabric tension set value. In 

case of variations it forms an actuating signal. The positioning signal 

is transmitted to a three-position controller that, in turn, triggers the 

drive of the lever arm, chain or spindle type stretcher. Depending on 

the polarity of the positioning signal the clothing will be tightened or 

slackened. 

In manual operation the operator can operate the drive for the tension 

using buttons and in this way move the tension carriage manually. 

E. g. during a clothing change. 

The position sensor is used for position monitoring and/or for wrap 

angle compensation. 

From the signals from the position sensor, the fabric tension controller 

determines the tension carriage position and the correction signal 

for the wrap angle compensation. 

Position monitoring: 

The tension carriage position monitoring makes it possible to output 

an alarm if thresholds are exceeded in automatic operation. There 

are two types of position monitoring, static and dynamic. 

In the case of static position monitoring two fixed thresholds are set, 

one minimum and one maximum tension carriage position. If the 

tension carriage passes these thresholds in automatic operation, an 

alarm is output and the tension carriage stopped. 

In the case of dynamic position monitoring, a dead zone is set. The 

thresholds are calculated from the actual tension carriage position 

and the dead zone when automatic operation is enabled. If the 

tension carriage passes these thresholds, an alarm is output and 

the tension carriage stopped. If the position of the tension carriage 

changes in automatic operation, the thresholds are continuously adjusted 

as per a time set. 

Wrap angle compensation: 

Wrap angle compensation is a function in the fabric tension controller. 

This function is used to correct changes in the fabric tension sensor 

signal due to changes in the wrapping on the measuring roller. 

Important: Pay attention to application notes for dryer groups 

in the description "Chain-type stretcher SP 1...", chapter 3.2.

1.3.2 Seam correction 

2. Assembly 

2.1 Fabric tension sensor 

2.2 Actuator 

2.3 Fabric tension controller 

2.4 Command stations 

(optional) 

2.5 Position sensor (optional) 

2.6 Digital interface (optional) 

2.7 Felt cocking unit (optional) 


The stretch roll can be adjusted at one end (tilted) for seam correction. 

As standard the chain-type and spindle-type stretchers have a handwheel 

for seam correction. 

On stretchers equipped with an E+L tension controller and the felt 

cocking unit VM 1... the adjustment at one end can also be performed 

automatically using a motor. The felt cocking process at one 

end can be defined individually by entering travel and time. See 

separate description. 

Please observe the locally applicable and professional safety 

and accident prevention regulations. 

Fabric tension control system assembly may only be performed 

by qualified personnel. 

The integrated fabric tension sensors are already mounted on the 

actuator. 

External fabric tension sensors, see fabric tension sensor PD description. 

Fit actuator (lever-arm type, chain-type or spindle-type stretcher) 

using the description provided. See also dimension drawing and 

layout drawing. 

Important: Pay attention to application notes for dryer groups 

in the description "Chain-type stretcher SP 1...", chapter 3.2. 

Fit fabric tension controller without housing in a control cabinet 

supplied by the customer. 

Fit fabric tension controller with operating unit in view of the actuator 

if possible. 

Fit command stations in view of the actuator if possible. 

The position sensor is already fitted to the actuator. 

See description for digital interface. 

See description for felt cocking unit. 

ANL--250534-EN-05 A page 5


3. Installation 


3.2 Actuator 

3.3 Fabric tension controller 

3.4 Command stations 

(optional) 

3.5 Position sensor (optional) 

3.6 Digital interface (optional) 

3.7 Felt cocking unit (optional) 

A page 6 ANL--250534-EN-05 


and accident prevention regulations. 

Fabric tension control system installation may only be per- 

formed by qualified personnel. 

The values specified for the supply voltage in the technical 

data chapter must be observed as otherwise operating failures 

may occur and the possibility of dangerous situations 

arising cannot be excluded. 

Connect electrical wires as per the enclosed wiring diagram. 

For EMC reasons it is imperative the PE conductor is connected 

to all control components. 

See description for fabric tension sensor. 

See description for actuator. 

See description for fabric tension controller. 

See description for command station/s. 

See wiring diagram. 

See description for digital interface. 

See description for felt cocking unit.

4. Setup-Editor 

Command station DO 200. 


The fabric tension control system is operated via the multifunctional 

command station DO 200. . 

The command station has two operating modes: operating mode for 

operating the fabric tension control system (see chapter Operation) 

and setup mode for displaying and editing the parameters in the CAN 

network. 

While operating mode is designed for the operator on the 

machine, settings in setup mode are exclusively reserved for 

qualified commissioning and service personnel. 

In the "setup editor" chapter basic operation in setup mode is explained. 

A detailed description of setup mode, the parameters and 

general functions of command station DO 200. may be found in 

the description of command station DO 200. . 

Amongst others in setup mode: 

- the parameters of all CAN devices connected in the CAN network 

may be displayed and edited, 

- the edited parameter values in the respective CAN devices may 

be saved, 

- the status of the CAN line checked, 

- clearly worded error messages displayed, 

- the level of the supply voltage checked, 

- service messages displayed, 

- the user language set, 

- the unit of measurement may be set, 

- in the case of multi-operation, customer-specific names may be 

set for the individual CAN groups. 

A flashing device address means that two CAN devices with the 

same CAN address are featured in the CAN network. 

If the device designation flashes, the CAN device is not featured (is 

not detected by CANMON). 

Please note! the setup editor may only be started once, even if 

several DO 200. command stations are connected in the CAN network. 

ANL--250534-EN-05 A page 7


4.1 Basic operation in setup-mode 

A page 8 ANL--250534-EN-05 

Start setup mode via the 

"Acknowledge" and "Increase value" keys 

Select menu item via the 

"Increase/decrease value" 

keys, e.g. "Show Cannet" 

Open/close menu item via the 

"Acknowledge" key 

Select required device via the 

"Increase/decrease value" keys. 

Select required 

parameter via the 

"Increase/decrease 

value" keys 

Open/close 

parameter via the 

"Acknowledge" key 

The following options are available for quitting setup mode: 

1. Go backward step by step, use keys “Acknowledge”, “Value up/dow” 

and finally “Escape”. 

2. Go backward step by step with the "Escape" key. 

3. Leave Setup Mode immediately by pressing one of the following three 

keys: "Automatic", “Center”, “Manual”.. 

If a password is requested in the display, 

enter the password via the "Increase/Decrease 

value" keys. The cursor may be 

moved via key "F 2". 

Select the 

required parameter 

setting via the 

"Increase/decrease 

value" keys. 

Change parameter value via the 

"Increase/decrease value" keys 

The cursor may be moved with 

key "F 2" . 

Use the "Acknowledge 

" key to set an asterisk, 

i.e. adopt the setting. 

In the case of rounded 

brackets (*) only one 

parameter setting may 

be selected, in the case 

of square brackets [*] 

several.

5. Commissioning 

5.1 Check actuator assembly 

5.2 Check wiring 

5.3 Interrupt the power/air 

supply 


During commissioning or operation no-one may remain in the 

danger area around the actuator. Please observe the locally 

applicable and professional safety regulations. 

Commissioning may only be performed by qualified personnel. 

Fabric tension controller DC 04../DC 24../DC 90.. does not 

have a main switch and once operating voltage is supplied, 

is immediately ready for use. It is then in the mode most recently 

selected. 

The actuator can move immediately in automatic mode! 

Commissioning sequence 

5.1 Check actuator assembly 

5.2 Check wiring 

5.3 Interrupt the drive power/air supply. 

5.4 Supply power to the fabric tension control system and set manual 

mode 

5.5 Check and set the fabric tension controller parameters 

5.6 Switch on the drive power/air supply. 

5.7 Check the actuator direction of travel 

5.8 Check the limit position switches 

5.9 Place position sensor in operation (optional) 

5.10 Check special functions (option) 

5.11 Insert clothing 

Check actuator assembly. 

The actuator must be mounted according to the attached planning 

drawing. The actuator must be aligned parallel. The floating bearing 

must be mounted in a centred position and move smoothly. 

Check the electrical wiring between the fabric tension sensor, fabric 

tension controller and actuator according to the attached wiring 

diagram. 

Interrupt the drive power/air supply. 

Fabric tension controller DC 04../DC 24../DC 90.. does not feature 

a main switch and is immediately ready for use once the 

operating voltage is supplied. It is then in the most recently 

selected operating mode. 


ANL--250534-EN-05 A page 9


5.4 Supply power to fabric tension 

control system and 

set manual mode 

5.5 Check and set fabric tension 

controller parameters 

Set control parameters 

P6 - P13 

Felt cocking unit 

yes 

Set parameters for 

felt cocking unit 

P15 - P23 


fabric tension sensor/s 

P25 - P30 

Set parameters for alarms 

P32 - P35 

External 

fabric tension sensor PD.. 

yes 


external fabric tension sensor/s 

P40 - P42 

Auxiliary modules 

yes 

Set auxiliary 

module addresses 

P52 - P55 

A page 10 ANL--250534-EN-05 

Connect the fabric tension control system to the operating voltage 

and switch on manual mode immediately. 

no 

no 

no 

Safety switch 

on fabric tension 

controller 

yes 

Select safety switch 

P57 

Wrap angle 

compensation 

yes 

Check and set parameters for wrap 

angle compensation P59 - P73 

Position monitoring 

yes 

Set parameters for position 

monitoring P59 and P60 , 

check P61 - P73 , 

set P78 - P84 

Fabric tension set value 2 

yes 


fabric tension set value 2 

P75, P76 

Terminate parameter 

setting 

no 

no 

no 

no

5.6 Switch on drive power/air 

supply 

5.7 Check actuator 

direction of travel 

5.8 Check limit 

switch 

Tighten 

Slacken 

Tighten 

Slacken 

5.9 Place position sensor 

in operation 

(optional) 

Slacken 

5.10 Check special functions 

(option) 


Start setup mode on command station DO 200. . 

Check fabric tension controller parameters and set the individual 

parameter values. 

See description "Fabric tension controller DC 04../DC 24../ 

DC 90.." and data sheet with customized settings for wrap angle 

compensation. The new parameter values will be immediately adopted 

and stored. 

Leave Setup Mode. 

Switch on the drive power/air supply. 

Move the actuator in manual mode (tighten and slacken). 

If the direction of travel no longer matches the tighten and slacken 

function, disconnect the fabric tension control system from the 

power and change the drive direction. 

Move the actuator in manual mode (tighten and slacken). 

With suitable equipment (risk of injury!) actuate the limit posi- 

tion switches that are to switch off the actuator drive once the 

actuator reaches its limit positions one after the other. 

If the effective direction no longer matches the limit position, disconnect 

the fabric tension control system from the power, check 

and if necessary change the limit position switch wiring. 

Set to manual. 

Start setup mode on operator panel DO 200. . 

Recall parameter 69 (position encoder), then slightly slacken the 

actuator. The position sensor must count backwards when slackening. 

If this is not the case, recall parameter P3 and start the service 

function "toggle encoder dir" (reverse position sensor counting 

direction). 

While in the manual mode slacken the actuator until it reaches the 

limit position and the limit switch terminates this process. 

Recall parameter P3 and start the service function "store stretcher 

0 pos" (save position sensor zero position). 

Check customized special functions. 

- See description "Fabric tension controller DC 04../DC 24../ 

DC 90..", chapter "Digital inputs/outputs". 

- On the usage of addition analog outputs, see description for the 

modules AK .... and/or LK ... . 

ANL--250534-EN-05 A page 11


5.11 Insert clothing 

Slacken 

A page 12 ANL--250534-EN-05 

Slacken the clothing in the manual mode until the actuator reaches 

the limit position and the limit switches terminate the process. 

Disconnect the fabric tension control system from the power. 

Insert the clothing. 

Connect the fabric tension control system to the power. 

Switch on automatic mode. 

The clothing is now tightened to the fabric tension set value. 

In the press section pay attention to the change in the length 

of the clothing on closing the press. The closing speed must 

be adjusted to the actuating speed of the chain-type stretcher.

6. Operation 

6.1 Command station DO 200. 

6.2 Keys and displays 

Group 0 

0.0 N/mm 

0.0 N/mm 

X.4: 0.0 X.5: 0.0 


During operation no-one may remain in the danger area 

around the actuator. Please observe the locally applicable 

and professional safety regulations. 

The fabric tension control system may only be operated by 

qualified personnel or suitably instructed persons. 


have a main switch and once operating voltage is supplied, 

is immediately ready for use. It is then in the mode most recently 

selected. 


The ELSTRETCHER fabric tension control system is operated via 

command station DO 200. . 

In this chapter only the operating functions for the 

ELSTRETCHER fabric tension control system are explained. 

A detailed description of setup mode, the parameters and 

general functions of command station DO 200. may be found 

in the command station DO 200. description. 

Clearly worded display 

Up to eight control systems may be operated via command station 

DO 2000. 

Line 1 of the clearly worded display indicates for which control 

system the command station is currently active, e.g. group 0. 

Lines 2, 3 and 4 indicate system-specific values. In the case of a 

fabric tension control system ELSTRETCHER these are : 

- the belt tension target value in line 2 

- the belt tension actual value in line 3 

- the individual actual belt tension values of both load sensors in 

line 4 (for double-sided measurement only) 

The values may be displayed in N/mm or PLi. 

ANL--250534-EN-05 A page 13


- (0.E)ZC4070 - 

Service 

_______________________ 

OK 

Felt cocking : Off 

Amplitude : 0 mm 

Time : 60 min 

Group 0 

0.0 N/mm 

0.0 N/mm 

X.4: 0.0 X.5: 0.0 

A page 14 ANL--250534-EN-05 

"Help" key 

Use the "Help" key to call up the status display. Error messages may 

be polled by CAN devices in the status display. Furthermore, E+L 

service points with telephone number, fax number and e-mail address 

are displayed. 

The green display on the "Help" key lights up if all CAN devices are 

ok. The yellow display on the key lights up if an error message is 

signalled. 

Navigation is as follows in the status display: 

Key ▲ and ▼: select menu option, e.g. "group 0" 

Key ↵: open/close menu options 

Key "F 4": terminate status display 

Alarm display 

The alarm display lights up as soon as a CAN device error message 

is supplied (e.g. temperature error, wrong CAN line, alarm period 

exceeded etc.. It goes out when the error is cleared. 

Device errors may be polled via the "Help" key (see "Help" key). 

In the case of serious device errors the fabric tension control system 

is switched off. 

Keys F1 and F2 not allocated 

F 3 Felt cocking 

Use key F 3 to call up the "felt cocking" menu for the optionally available 

felt cocking unit. In the "felt cocking" menu the felt cocking unit 

may be switched on/off and both the oscillation stroke and time set. 

The felt cocking unit only operates if the fabric tension control system 

is set to automatic mode. 

Navigation is as follows in the "felt cocking" menu: 

Key ↵: select menu options, e.g. "amplitude" 

Key F 3: terminate menu 

Key ▲and ▼: change values 

F 4 Multi-command 

Use key F 4 to select the control system for which the command 

station is to be active: group 1, group 2, group 3, group 4, group 1 

etc. If there is only one control system in the CAN network, key F 4 

has no function. 

Line 1 of the clear text display shows for which control system the 

command station has been activated, for example group 0.

Increase set value 

Decrease set value 

Tighten 

Slacken 


"Automatic", "Increase value", "Decrease value" keys 

Key "Automatic" starts the automatic mode. The green display of the 

key lights up. 

In the automatic mode the actuator drive is controlled by the signals 

of the belt tension controller. If the felt cocking unit is switched on the 

felt will be additionally cocked (automatic seam correction). 

In automatic mode the fabric tension set value is changed via the "Increase 

value"/"Decrease value" keys. The fabric tension set value is 

changed by one unit (for example 0.1 N/mm) per press of the key. 

The fabric tension set value may however only be changed within 

the specified range in parameters 7 and 8. See "Fabric tension 

controller DC 04../DC 24../DC 90.." description. This is designed 

to avoid incorrect entries (belt target value too big / too small) 

causing actuator or clothing damage. 

"Manual mode", "Increase value", "Decrease value" keys 

Key "Manual" starts the manual mode. The green display of the key 

lights up. 

In manual mode the actuator is moved via the "Increase value/decrease 

value" keys (tightened/slackened). 

The actuator may only be moved (tightened) until the maximum 

set value specified in parameter 7 is reached. See "Fabric tension 

controller DC 04../DC 24../DC 90.." description. This is designed 

to avoid incorrect entries causing actuator or clothing damage. 

The "Increase value"/"Decrease value" keys are disabled if a 

remote control is connected to the fabric tension controller and 

switched on. See "Fabric tension controller DC 04../DC 24../ 

DC 90.." de-scription. In this case the message "disabled" is indicated 

in the clearly worded text display. The message must be 

deleted via the "Acknowledge" key. 

Manual mode is also disabled if the "Disable manual mode" input 

is activated on the fabric tension controller. 

Keys "Acknowledge", "Escape" and “Center" 

have no function. 

ANL--250534-EN-05 A page 15


6.3 Operating sequence 

Group 0 

0.0 N/mm 

0.0 N/mm 

X.4: 0.0 X.5: 0.0 

Felt cocking : Off 

Amplitude : 0 mm 

Time : 60 min 

A page 16 ANL--250534-EN-05 

No-one is allowed to stay in the hazard area during operation. 


regulations. 

The fabric tension control system may only be operated by 

qualified or suitably instructed persons. 


feature a main switch and once operating voltage is supplied, 

is immediately operational. It is then in the most recently selected 

operating mode. 


Enable the fabric tension control system operating voltage. 

Select control system (in the case of multi-commands only). 

Select required operating mode. 

Switch on the felt cocking unit (only in the case of fabric tension 

control systems with felt cocking units). 

The felt cocking unit is only active in automatic mode. 

If necessary set the amplitude and time.

6.4 Error messages 

Error code Error name Description 


001 alarm time Max. control time of parameter P38 exceeded 

If alarm mode 1 is set in parameter P37, the actuator drive is also stopped. 

002 encoder calib Position sensor error: 

- Maximum travel parameter P60 exceeded 

- Position sensor reference position incorrect or not saved, save reference position in 

parameter P3. 

- Only one of the position sensor pulse generators is connected, check position sensor. 

003 max. diff. lcells Max. permissible difference between the actual values for the fabric tension from fabric 

tension sensor 1 and 2 exceeded, parameter P35 


004 lcell overload Fabric tension sensor overloaded (for integrated fabric tension sensor EM 2000 only) 

The actuator drive is stopped. 

The drive remains stopped until the error is rectified. 

005 hand wheel out Hand wheel disengaged 


The drive remains stopped until the handwheel is engaged again. 

006 gear blocking Position sensor error (only for wrap angle compensation): 

The gearbox self-locking on the actuating device is becoming looser. 

The error message appears only in the fabric tension control mode, parameter P47 = 0 

007 reserve - 

008 

009 

switch limit tig. 

switch limit s.o. 

Limit switch tighten / slacken (1, 2) reached 


The drive remains stopped until the actuator has been moved from the end position in 

manual mode. 

010 limit act. value Max. permissible set value error passed, parameter P33/P34 


011 

012 

AK 4215 n.c. / bad 

AK 4014 n.c. / bad 

AK 4215 not connected or error in AK 4215 

AK 4014 not connected or error in AK 4014 

013 motor direction! Direction of rotation incorrect: 

- Direction of rotation of the drive on the actuator is incorrect (message appears only in 

conjunction with a position sensor), change drive connections. 

- Position sensor counting direction incorrect, invert counting direction in parameter P3. 

- Direction of rotation of the drive incorrect on the optionally available felt cocking unit, 

invert direction of rotation in parameter P3. 

If error mode 1 is set in parameter P73, the actuator drive is also stopped. 

014 24 V under voltage 19,5 V DC operating voltage not achieved 

015 24 V over voltage 30,5 V DC operating voltage exceeded 

016 motor thermal fuse Motor protection switch is triggered 


The drive remains stopped until the error is rectified. 

017 repair switch Customer repair switch on (option) 

see description "Logic board LK 4203" 

018 position invalid Position sensor error (only for position monitoring): 

Alarm limits "min/max position" for the position monitoring passed, parameter P82, P83 

If 1 is selected in parameter P84, the actuator drive is also stopped on the occurrence 

of this error message. 

ANL--250534-EN-05 A page 17

7. Maintenance 


7.2 Actuator 

8. Repair 

9. Spare parts 

10. Technical data 

Erhardt + Leimer GmbH 

Postfach 10 15 40 

D-86136 Augsburg 

Telephone (0821) 24 35-0 

Fax (0821) 24 35-6 66 

Internet http://www.erhardt-leimer.com 

E-mail info@erhardt-leimer.com 

If one of the errors described in the table occurs, the appropriate 

message is indicated in the DO 200. command station display of fabric 

tension controller DC 04../DC 24../DC 90.. . The error message is 

displayed until the error is cleared. 

If several errors are featured simultaneously, the error with the highest 

priority is displayed. When this error is no longer featured, the 

display changes to the next error code. If no more errors are featured, 

the fabric tension actual and set values are displayed again. 

Errors may only be cleared by qualified personnel. 

See fabric tension controller DC 04../DC 24../DC 90.. description. 

Maintenance may only be performed by qualified personnel 

when the fabric tension control system and processing 

machine are switched off. 

See fabric tension sensor description. 

See actuator description. 

Necessary repairs on the fabric tension control system may 

only be performed by E+L or a body expressly authorized to 

do so. 

Spare parts may be supplied on request. 

The technical data depend on the respectively implemented devices. 

See attached device description.

Operating manual ELSTRETCHER fabric tension ... - Erhardt+Leimer

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