cybelec DNC880S PC 1200 Reference Manual

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ModEva/DNC880S

PC 1200 2D

2D Reference Manual

CYBELEC SA Tel. ++ 41 24 447 02 00 RUE DES UTTINS 27 Fax ++ 41 24 447 02 01 CH - 1400 YVERDON-LES-BAINS E-Mail: info@cybelec.ch SWITZERLAND V-DOC-MODEVA-EN

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August 3, 2006 V. 1.3

TABLE OF CONTENTS

INTRODUCTION..............................................................................................................................5

About this Manual 5 Licence Agreement and Copyright 5

CONVENTIONS...............................................................................................................................7

DEFINITIONS...................................................................................................................................11

ABS .....................................................................................................................................11

REL 11

Active Peripherals ........................................................ .......................................................12

Active Peripherals Machine 12 Active Peripheral Products 13

Active Peripheral Punches / Dies 13

Admissible Force applied to the Dies.. ................................................................................13

Alphanumeric Fields............................................................................................................15

Angle Corrections................................................................................................................16

General Remarks 16 Direct Corrections 16 Angular Corrections 17 Corrections by Thickness Measurement 17

Measuring at the TDC 18

Measuring at the PP 20

Independent Thickness Correction Y1-Y2 22

Corrections: Sensitivity BDC 22

Auxiliary Functions ..............................................................................................................23

Backgauge Retraction.........................................................................................................23

Bend ....................................................................................................................................23

At the bottom of the Die 23

Final 23

Intermediate 23

Sequence without Bend 24

Bend Counter ......................................................................................................................24

Bending Force.....................................................................................................................24

Bending Order.....................................................................................................................25

Automatic Bending Order 25

Modifying the Bending Order 25

Unbend Mode 27

Bending Speed....................................................................................................................29

BG (Backgauge) or STOP...................................................................................................29

Bottoming ............................................................................................................................30

Corrections (Table)..............................................................................................................31

Crowning .............................................................................................................................32

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Data Backup ... ................................................................................... ................................. 32

Data Transfer................. .................................................................................. ................... 33

Date and Hour .................................................................................................................... 35

Decentered Punches & Backgauge Correction.................................................................. 36

Depth Collision authorized.................................................................................................. 36

Drawing............................................................................................................................... 37

Dwell Time.......................................................................................................................... 38

Erase / Delete............................................................................. ........................................ 38

Erasing Memories...............................................................................................................39

Free Memory ...................................................................................................................... 39

Gauge Clearance ..................................................... .......................................................... 40

Ideal Curve (CR)................................................................................................................. 41

PRODUCT NUM Page 41

Indexing Axes ..................................................................................................................... 46

Inserting a Sequence.................................................................. ........................................ 46

Internal Radius.................................................................................................................... 47

Keyboard ............................................................................................................................48

L. Bending........................................................................................................................... 48

Language............................................................................................................................ 49

Leaving the Software.......................................................................................................... 49

Leg...................................................................................................................................... 50

Length................................................................................................................................. 51

Low Speed Distance  ...................................................................................................... 51

Machine Parameters .......................................................................................................... 51

Maintenance ....................................................................................................................... 52

Manual Adjustment of the Backgauge................................................................................ 52

Modifying the Origin of the Axes...... ................................................................................... 53

Parametric product ............................................................................... .............................. 55

Activation of the function 55

Create a parametric product 55

Working with a parametric product 59

Product Groups................................................................................................................... 60

Definitions 60

Working example in the PRODUCTS GROUP page 61

Product information ............................................................................................................ 62

See an Informtion 63

Creating an Information (text only) 63

Creating an Information (text and images) 63

Product Management ......................................................................................................... 66

Programming a Profile........................................................................................................ 67

Programming on Bend Num............................................................................................... 67

Programming while working ............................................................................................... 68

Q.Needed. ___ Done.___................................................................................................... 69

Reference YR cor. .................................................................................... .......................... 69

Screen Capture................................................................................................................... 70

Black and white, colour 70 Screen printing 71

Searching for Products according to Criteria ..................................................................... 73

Memorization date 74

Section................................................................................................................................ 75

Sigma.................................................................................................................................. 75

Simulation criteria ............................................................................................................... 76

SP (Switch Point)................................................................................................................ 79

Special bends ..................................................................................................................... 80

Preliminary / Final bend 80

Start Axes/AF.. .................................................................................................................... 85

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TDC (Top Dead Centre)......................................................................................................86

Tolerance.............................................................................................................................87

Too short segment authorized ............................................................................................88

Tools....................................................................................................................................88

Programming punches 89 Programming dies 91 Modifying a tool 93 Tool positions 93 Punch list / Die list 93

Unfolded Length..................................................................................................................94

DIN 95 REAL 95 Correction coefficient of calculation DIN 6935 95

INDEX ..............................................................................................................................................97

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INTRODUCTION

ABOUT THIS MANUAL

This document has been conceived to try and answer particular questions after having acquired the basis for using the ModEva/DNC 880S software. It is complementary to the User guide which informs you about the basic procedures to be followed for using this software.

A supplement called 3D Reference manual is supplied with the ModEva software in 3D version.

This manual is organized like a dictionary, that its elements are classed in alphabetical order. If a subject is dealt with in another chapter than the one in which you are looking for information, you will find a reference to the new subject. An index situated at the end of the manual completes and facilitates the search for information. Do not hesitate to use it.

Some functionalities treated in this manual are not available on DNC 880S.

LICENCE AGREEMENT AND COPYRIGHT

This manual is subject to the licence and copyright agreem ent to be found at the beginning of this manual.

INTRODUCTION PAGE 5

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CONVENTIONS

As a general rule, in this manual, we will not repeat how to validate a field, select a tool, call a page or any other basic manipulations. These are described by means of examples in the User guide of the numerical control or the relevant software.

In order to ensure a better readability of the reproduced screens, these ones have been converted in black and white. Possibly, certain screens illustrated in this manual may not correspond exactly to your software, this can result from the configurati on of your software (number of options, axes, etc.) or from the used software version (DOS or Windows).

Typographical conventions Arial bold Quotations of text as seen on the screen.

Arial bold italic Used to indicate the name of a DNC input or

Italic Reference to a written element , a paragraph or

output.

a manual. For example: See Typographical conventions.

Indicates a double pressure on the key.

General conventions for this manual

It is accepted that: Mouse means a mouse for a PC

or trackball / tracksensor for a DNC. Click press the left mouse button. Click right press the right mouse button. Click left/right press simultaneously the left and right mouse

buttons. Round robin lists or multiple choice fields:

They are violet coloured and signify that several

options are available.

The choice of the contents is made by pressing

the

A window appears displaying the list of the

available choices for this field.

To validate the choice:

- type the number indicated next to the choice,

- place the cursor on the choice and press the

key.

CONVENTIONS PAGE 7

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It is possible, without displaying the choice window, to make appear one after the other the

Reach the BEND 2D page

choices by pressing the To validate, leave the field.

Function keys

Each time you are asked to press a function

key appears. Generally, the name of the function key will be used. For example: press PRODUCT

designates the

to , the appropriated menu

key.

Example when you want to reach the

BEND 2D page, press the function key BEND

, then sélect BEND 2D or simply type 02

(or the number indicated next to the choice).

Rapid validation To facilitate the operator's work, the DNC

memorizes the last choice made in a menu. To validate faster an option of a menu, just

double press on a function key (e.g.: directly validate the last select ed page.

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), to

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Software conventions, Windows version

In basic configuration, the Windows version uses the following colours: Black Designates fixed information, designates fields

etc.

fields accessible by the cursor which can be

modified by the user. Blue Used for titles and headnotes. Bluish-grey Variable information. Not accessible by the

cursor. Green Scrolling fields. Accessible by the user for

choosing between several predefined options

(see Scrolling lists above).

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DEFINITIONS

ABS

Page: BEND NUMERICAL This round robin list is placed next to the name of the axis of the X stop.

Two choices: ABS and REL. ABS indicates that the X axis functions in absolute mode. This means that the destination of the axis is an absolute distance m easured

from the die V. Absolute mode is selected by default. See REL below. Example: MEM POS

X ABS 190.00 120.00

REL

REL indicates that the X axis functions in relative mode.

This means that the displacement program med is made departing from the actual stop position. Generally a negative value is programmed.

The relative mode is often used with the cycle repetition (CY 2 at 99). For example with a punching tool, you wish to make 5 holes equidistant of

30.00mm. The first sequence must be in absolute mode (location of the first hole. The second sequence will be programmed in relative mode (X REL 30.00) with a cycle repeti tion equal to 4 (CY 4).

Example: MEM POS

X REL 70.00 120.00

DEFINITIONS PAGE 11

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Remark: It is not possible to use the relative mode on the first sequence.

ACTIVE PERIPHERALS

Page: WELCOME

Aim: This function allows to choose the peripheral containing the required information and this separately for the machine parameters, the products, the tools the CAD files and the complementary files on the product information page. It offers a multitude of combinations especially appreciated on a PC work station. Effectively using these choices, the operator could easily manage several machines.

The comprehension of this notion is important, as its flex ibility allows a large diversity of choice.

Definition: The active peripheral is the peripheral in which the software is going to read, search, save or delete data. The active peripherals are designated on the WELCOME page. On certain pages, another peripheral can be temporarily selected for an operation (for ex. PRODUCT LIST, PROGRAMMING PUNCHES / DIES, TRANSFER).

If such is the case, an error is generated when changing mode (AUTO, SEMI-AUTO) and the message DEPL. X REL.

IMPOSSIBLE is displayed in the interactive field.

Active Peripherals Machine

When you change the peripheral in the MACHINE field, automatically PRODUCTS, PUNCHES and DIES are redirected on to the same

peripheral. To change them independently one from the other, you must simply modify them afterwards.

The CAD FILES and COMPLIMENT peripherals are not modified automatically, as they are generally situated on a network and are often the object of a “specific classification” in one or several directories.

By modifying in this way the MACHINE peripheral, the environment of the software “ becomes” that of another machine. It is thus easy to simulate products for different configurations of pressbrakes. Also, more and more you will find diskettes containing examples of special products (supplied by CYBELEC or by the machine manufacturer) for which the realization needs a specia l (Tools for example). With th is possibility you can thus easily visualize these demonstrat ions with all the machine context in which they were created.

On a numerical control, it is evidently only possible to work with a machine when the MACHINE field is switched to INTERNAL. If another peripheral is used to visualize a demonstration product for example, it will however still be possible to switch the DNC to semi-auto or auto mode.

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However the massage ENC NOT CONNECTED will appear and it will not be possible to work with the machine. To reactivate the INTERNAL machine peripheral, you must:

 Select MACHINE INTERNAL.  Initialize the ENC by pressing INIT ENC, Action menu.

Active Peripheral Products

Selects the default peripheral in which the operations of searching, saving and deleting of products is effectuated.

Active Peripheral Punches / Dies

Selects the default peripheral in which the operations of searching, saving and deleting punches and dies is effectuated. Evidently the tools specified in the current product must be available in the addressed peripheral, without which the software will give an error message.

ADMISSIBLE FORCE APPLIED TO THE DIES

Page: PROGRAMMING OF DIES The maximum admissible force is defined when programming the tools. In reality however, the admissible maximum force varies depending on the bending angle (and, of course, on the other customary parameters).

The die programming page contains two pairs of fields which make it possible to adapt the safety parameters. The fifth field enables the user to test the result.

When only the first Ton/m field is programmed, this means that the pressure limit is constant and not depending on the angle.

__._° -> max 200.0 Ton/m

__._° -> max ___._ Ton/m

Test 90.0° = 200.0 Ton/m

The Test field indicates the maximum admissible force for the programmed angle.

When the fields "open angle" programmed, the calculation of the admissible force is limited according to the diagram shown below.

and Ton/m on the same line have been

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If there is no specific indication given by the manufacturer, you enter the maximum admissible force already known, and an "open angle" of 90° (as below).

90.0° -> max 200.0 Ton/m

__._° -> max ___._ Ton/m

Test 60.0° = 115.5 Ton/m

When the 4 fields have been programmed, the calculation of the admissible force is limited according to the diagram bel ow. The choice between the above method and the method explained in this paragraph depends on the known data and the decision of the person who enters the die data.

90.0° -> max 200.0 Ton/m

30.0° -> max 45.0 Ton/m

Test 60.0° = 122.5 Ton/m

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ALPHANUMERIC FIELDS

Certain fields (DRAWING, PUNCH, DIE etc.) can contain alphanumeric characters.

To program the alphanumeric fields on the numerical controls, you must use the "soft" alphanumeric keyboard.

To call the "soft” alphanumeric keyboard in the software , position the cursor on the alphanumeric field (if the field is only numeric the keyboard will not

appear) and press the 4 tables of characters are available (#1, #2, #3 and Alt).

To change the "table":

 Point to the field bo ttom left #1, #2, #3 or Alt and press

or click left in this field.

To enter the characters in to the alphanumeric field:

 Select the character.

key.

 Press

Repeat the operation for the other characters.

 To leave, press the

DEFINITIONS PAGE 15

or click left.

key again.

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ANGLE CORRECTIONS

Pages: CORRECTIONS

GENERAL REMARKS

The sheet metals used in the workshops have hardly ever their nominal thickness. The real thickness commonly varies ±10% from the nominal value. Also the variation is not constant across the whole length of the sheet. The thickness on the left side can be different to the thickness on the right side (sheets with a trapezoidal section). The software allows to correct this type of error by dissociating the correction of one extremity from that of the other extremity of the bend.

The bending depth calculations (as well as those for elongation, pressure and crowning) are based on the nominal thickness (that which is programmed in the THICKNESS field).

In this Angle corrections chapter we will deal with 3 types of correction:

 Direct corrections  Angular corrections  Corrections by measuring the sheet thickness.

Depending on the field in which it is entered, a correction can act on:

 The relevant bend (uniquely)  All the bends (with the same angle) situated on the sam e section

(same profile)

 All the bends (with the same angle) of the product (also on distinct

sections)

DIRECT CORRECTIONS

To use direct corrections, the DNC must be in programming or semiautomatic mode and you simply enter a value in to the required field on the first table of the page. The number of the current bend is located at the top of the screen.

If the correction concerns the two sides of the beam, the sam e value for Y1 and Y2 must be entered.

It is also possible to correct the other axes, the PP, the bending force and the crowning according to the same principles.

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Direct corrections are additioned. This means that if there is a global correction for the product and a correction for a given bend is programmed, the final correction for this bend will be the sum of the two corrections.

ANGULAR CORRECTIONS

After having made a bend, the operator measures the angle obtained. The measured angular value is entered in to the ANGLE field. The DNC automatically calculates the correction to obtain the angle originally programmed. If after making the corrected bend, the angle is still not correct, simply enter the new measured angle value. In certain cases this operation may have to be repeated 2 or 3 times.

Attention, you must not intervene in the direct corrections table simultaneously with the angular corrections.

As for the direct corrections the corrections can be attributed to:

BEND Corrects only the current bend. SECTION _ Corrects all the angles of the specified section

which have the same programmed value and the

same tools. PRODUCT Corrects all the angles of the product which

have the same programmed value and the same

tools.

The DNC must be in programming or semi-automatic mode.

 Program the THICKNESS MEASUREMENT field in the following

manner:

THICKNESS MEASUREMENT CENTRAL NONE MODE OLD MEASURE

 Measure the angle obtained.  Introduce the measured value in to the ANGLE field under one of the

columns BEND, SECTION or PRODUCT.

 Test the result and redo if necessary.

See also the machine para meter COMPENSATION ELASTIC RETURN on the MATERIAL page. This parameter allows to correct in p ermanence an angle in a given plane.

CORRECTIONS BY THICKNESS MEASUREMENT

Correction by thickness measurement can be realized in several ways, but the principle remains identical. A system (or the operator) furnishes the DNC with the real measurement of the material. With these parameters, the DNC calculates the necessary correction.

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The two main methods are: Measuring at the TDC (Top dead center) Measuring at the PP (Pinch point).

Measuring at the TDC The principle is that the measurement is made

and entered in to the DNC while the machine is at the TDC. The measurement is entered either conventionally using the keyboard, or by a RS232 link using an adequate instrument of measure, or otherwise by a system integrated at the stop.

Measuring at the PP In this case the measurement is made at the PP.

Three possibilities are offere d.

- Measurement by the beam.

- Measurement by the beam with die displacement.

- Measurement of the real PP by an external system.

As for the direct and angular corrections, it is possible to affect the correction to the current bend, to the section or to the whole product.

Also, with the correction in function of the measurement of the thickness, it is possible to differentiate the correction for each extremity of the bend. The choice is made using the round robin list CENTRAL or EXTREMITIES. (See further on in this chapter for the use of this possibility).

Remarks: For technical reasons, you can only pass to programming mode

during working (DNC in automatic mode and programming) if NO THICKNESS MEASUREMENT has been selected. For technical reasons, the fields POS. SHEET and THICKNESS MEASUREMENT can no longer be modified in semi-automatic mode.

Measuring at the TDC

As described in the introduction to this chapter, the measurement is made when the beam is at the TDC. Only the introduction of the measurement by the operator , such as the "standard" DNC software will allow, will be described in this paragraph. The DNC must be in programming or semi-automatic mode. Proceed in the following way:

 Program the THICKNESS MEAS URE MENT field in the following

way:

THICKNESS MEASUREMENT CENTRAL TDC MANUAL MODE BY BEND

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 Measure the thickness very precisely (using a micrometer).  Enter the measured value in to the LEFT THICKNESS field of the

PRODUCT, SECTION or BEND column depending on your needs. By only programming the LEFT THICKNESS field, the software assumes that the measurement is central.

 Leave the field.  Bend.

If the introduction is made in the PRODUCT column:

- The measurement made by the operator on whatever bend will remain valid until the next measurement.

- The real thickness obtained is saved in association with the product.

- It is considered that the real thickn ess is the same for all the bends.

- At each new measurement, all the bends are re-corrected.

- If no measurement is made, the correction is made according to the last measurement saved.

SECTION

- The measurement made by the operator on whatever bend of the section will remain valid until the next measurement..

- The real thickness obtained is saved in associati on with the section to which belongs the bend on which it was made. It is valid for all the successive bends belonging to the same section.

- If a new measurement is made, all the bends of the relevant section are re-corrected.

- If no measurement is made, the correction is made according to a possible former measurement saved in association with that section.

Remark: This means that if any values are present in the SECTION

column, they will be taken in to account and the values in the PRODUCT column will be ignored. If there are no values in the SECTION column, the values in the PRODUCT column, if they exist will be taken in to account.

BEND

- The measurement made by the operator on whatever bend is only valid for that bend. It will also be memorized.

- If no measurement is made, the correction is made according to a possible old measure memorized in association with that bend.

Remark: If any values are present in the BEND column, they will be

taken in to account and the values in the SECTION and PRODUCT columns will be ignored. If there are no values in the BEND column, the values in the SECTION column, if they exist will be taken in to account. If only PRODUCT column contains any values, then it is these that will be taken into account.

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Measuring at the PP

Only the measurement at the PP with the beam will be described in this chapter.

Principle: The beam makes its usual approach (in semi-auto or autom atic). When it reaches just before th e th eoretical PP, the DNC reduc e s th e syste m pressure and "lands" freely on the sheet. The DNC detects the stopping of the beam and in this way allows the measurement of the sheet thickness. It is evident that in this phase the sheet must not flex under the influence of the beam, otherwise the measurement will be falsified. The way in which this option functions will depend directly on the machine hydraulics, the speed when arriving on the sheet and the minimum force of the beam in this measurement phase.

It is obviously unthinkable that in this phase the beam be out of true, the measurement would then be totally false. Ideally the product should be in the centre of the machine, have a bending length greater than 2/3 of the total length of the machine and be able to support the weight of the beam without flexing.

As for the other corrections the measurement can be made by product, section or bend, central or at the extremities depending on the choice made.

Before each use, a calibration must be done in order to gauge the whole.

Calibration

A calibration cycle is ver y simila r to a meas urement cycle. Simple, the real thickness obtained is subtracted from the nominal thickness.

This difference is memorized to be used later as a correction for the real thickness calculations.

Procedure:

 Measure the sheet with a micrometer.  Select CALIBRATION MODE.  Enter the values in the appropriate fields RIGHT THICKNESS and

LEFT THICKNESS of the CORRECTIONS page.

 Put the DNC into semi-auto mode.  Place the sheet at the centre of the machine and make a bend.  If the calibration cycle has been done correctly the differences

between the real thicknesses measured and the reference values will be displayed in the lines LEFT THICKNESS and RIGHT THICKNESS, under the --AIM-- column. They will remain there until the next calibration.

 Select the required measurement mode MODE BY PRODUCT,

BY SECTION or BY BEND. From that moment on, during working,

the measurement will be made according to the option chosen. See also the description of OLD MEASUREMENT mode which follows.

Remark: If the POS. SHEET field is not defined, it is supposed that the

sheet is centred between the two rulers. If the length of the sheet is not defined, it is supposed that it is equal to the distance between the two rulers Y1 and Y2 (machine parameters).

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Working with the correction MEASUREMENT AT THE PP

After having done the calibration, MODE BY PR ODU CT, BY SECTION or BY BEND must be selected depending on whether you wish to effectuate a measurement by product, section or bend respectively.

OLD MEASUREMENT In this mode no new measurements are made.

The old measurements memorized in association with the product, section or bend are conserved and used. This mode is especially useful when working with a batch of sheets sufficiently homogenous. In such a case it is sufficient to proceed with a single thickness measurement during the first bend of the first product and to correct on the same basis thereafter. This allows to avoid the inevitable time loss associated with me asuring. This work mode also applies in the case of working with groups of products, because the old measurements associated with the last product executed are recopied on to the following product.

PP TOLERANCE IN % OF THICKNESS

Page: MACHINE PARAMETERS / MATERIALS. This field allows to define a maximum limit to the "dispersion" of the material when the thickness correction at the PP is being used. In cases where the thickness of the measured sheet is superior or inferior to nn%, the bend will not be carried out and the system will issue a message to the operator. See Corrections (Table).

THICKNESS CORRECTION FACTOR

Page: MACHINE PARAMETERS / MATERIALS. This table allows to define a set of corrections according to the thickness variation when th e thickness correction at PP is being used. The default value for this factor is 1.00. If the user notes that for a given material, the software has a tendency of overcompensating (i.e. the beam goes too far down when the real thickness is less than the nominal thickness, or the beam does not go down far enough when the real thickness exceeds the nominal thickness) he enters a value between 0.99 and 0.0 in the respective angle range. However, if the software does not compensate enough, the operator enters a value between 1.01 and 99.99. See Corrections (Table).

DEFINITIONS PAGE 21

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INDEPENDENT THICKNESS CORRECTION Y1-Y2

The principle consists of furnishing or (using one of the methods described above) the thickness at each extremity of the bend. By means of this data and knowing the position of the sheet, the DNC will calculate a different correction for Y1 and Y2. This type of correction is particularly appreciated for bending sheets with a great bending length and an important variation in thickness.

For this to function, the machine parameters describing the position of the rulers, the machine width ,etc. must be programmed, otherwise an error message will appear.

The independent thickness correction Y1 Y2 can be used in conjunction with either the thickness measurement at the PP or the thickness measurement at the TDC. It will also function with the choice of correction by product, section or bend.

Thickness measurement at the TDC

Functioning is identical to that described in the Measurement at the TDC paragraph above, except that the position of the sheet and the thickness at each extremity must be programmed.

 Select THICKNESS MEASUREMENT AT EXTRE M I TIES  Program the position of the sheet in the POSITION SHEET field and

in the chosen column.

 Introduce in the same column the sheet thickness measured at each

extremity of the future bend.

 Leave the field.  Bend.

Thickness measurement at the PP

Functioning is identical to that described in the Measurement at the PP paragraph above, except that the position of the sheet must be programmed.

 Select THICKNESS MEASUREMENT AT EXTRE M I TIES.  Program the position of the sheet in the POSITION SHEET field and

in the chosen column.

 Proceed as described in the Measuring at the PP paragraph above.  Continue bending.

CORRECTIONS: SENSITIVITY BDC

Page: CORRECTIONS, field: SENSITIV ITY BDC. This field indicates which depth variation is necessary to obtain an angle

variation of 1 (one) degree in the current sequence. If this value is too small (e.g. < or = 0.05 mm), it is recommended to use a

die with a wider V opening.

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AUXILIARY FUNCTIONS

The auxiliary functions can be programmed and used for various means by the manufacturers. It is thus inappropriate to discuss them here, please ask the manufacturer of the machine for details of their functions.

BACKGAUGE RETRACTION

Page: BEND NUMERICAL In certain situations it is necessary to disengage the back gauge during

bending. This field is automatically programmed when an automatic search for the

bending range is made. This value can be modified after the simulation by the operator.

The retraction value is a relative value usually positive. If a negative value is programmed, this allows to execute a negative “retraction”, that is a displacement towards the die.

A minimum default retraction can be imposed in the machine parameters.

BEND

AT THE BOTTOM OF THE DIE

See Bottoming.

FINAL

See Special bends.

INTERMEDIATE

See Special bends.

DEFINITIONS PAGE 23

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SEQUENCE WITHOUT BEND

Page: BEND NUM

It can be useful for the operator to create a sequence which does not realize a bend, but executes the displacement of an axis or an auxiliary function.

 Insert a supplementary sequence for this operation (see Inserting a

Sequence).

 On BEND NUM page, in the desired sequence, delete the angle and

program a value Y1/Y2 greater than that of the pinch point.

When executing the product, the axes and auxiliary functions position themselves as normally, but when the operator gives a descent command, the beam will not descend. If the DNC is in automatic mode, the next sequence will be displayed, the axes position themselves on the new values and the beam will be waiting for a descent command, as usual.

In the case that the beam should not descend and the operator has directly programmed the Y1/Y2 values, it is to verify that these values are not greater than those of the pinch point.

BEND COUNTER

The WELCOME page displays the number of bends carried out since a given date. The counter is set to zero in our plant. When the first bend in automatic or semi-automatic mode is done, the counter starts running and the date is automatically writte n. This data can not be modified on-site.

BENDING FORCE

Page: BEND NUM If the data concerning the length, the thickness, the sigma and the tools are

known, this field is automatically calculated. It indicates the bending force (tonnage) needed for the bend.

This field can be reprogrammed as you require. However if the value entered is greater than the tool safety, an error message is generated in the intera ctive field. These safety controls are executed when changing the DNC m ode (see Tools).

PAGE 24 2D REFERENCE MANUAL MODEVA/DNC 880S

Page 29

BENDING ORDER

AUTOMATIC BENDING ORDER

The software can effectuate on demand an automatic search for the bending order. The result is conditioned by the "simulation criteria" that the operator can enter depending on his requirements according to the product to be produced (see Simulation criteria).

Enter the product data (see the manual User guide). BEND 2D page, BEND 3D page.

 Choose the simulation criteria.  Position the cursor on the SIMULE field and select WITHOUT

 Choose SEARCH BENDING ORDER in the action menu.

Depending on the complexity of the product, the software will furnish a complete solution, a partial solution, or no solution. See hereinafter Unbend Mode.

IMPOSED BEND.

MODIFYING THE BENDING ORDER

Above: Initial situation.

Requested situation.

This operation is preferable done on the BEND 2D page (with a 3D version, it is possible to realize this operation on the BEND 3D page. See also the 3D Reference manual).

DEFINITIONS PAGE 25

Page 30

Pg Dn

 Select the sequence to be modified (

keys).

 Place the cursor on the FACE field and enter the number of the face

to be bent (3).

 Place the cursor on the STOP field and enter the number of the stop

(4). The software proposes the possible stops in the STOP PR field.

 Select SIMULE BEND in the Action menu.

The sequence which bends the chosen face has been deleted. The next sequence bends the same face (BEND 2).

Change the stop if necessary.

 "Move" to the sequence to be modified (BEND 3 with the

Pg Dn

keys).

 Place successively the cursor on the FACE field and enter the number

of the face, then on STOP and enter the stop for this sequence (in this example FACE 1 and STOP 0).

PAGE 26 2D REFERENCE MANUAL MODEVA/DNC 880S

Page 31

 Select SIMULE BEND in the Action menu.

Proceed in the same way for other bends or to totally impose a simulation. If you have mastered the numbering of the faces and stops, it is not necessary

to simulate each bend. After having finished the introduction for sequence simply position the cursor on the SIMULE field, select WITH IMPOSED

BEND and SEARCH BENDING ORDER in the Action menu.

UNBEND MODE

The unbend mode is useful when the software cannot find a solution for the bending order.

The unbend mode presents the finished product, the operator determines the bending order manually in the same way as described above, but by commencing with the last bend and going towards the first.

Below a simple example in which the product touches the table frame before the bend, however the sheet is put. The solution for this product is to create an intermediate bend. This so lution is described in Special bends. This section only shows how to use the unbend function.

In the 1 already touches at the 2

figure, the product touches at the last bend, in the 2nd figure it

bend.

DEFINITIONS PAGE 27

Page 32

Below are the data of the product (the die height is 50 mm).

In BEND 2D page, when asking to search a bending order, the message Solution not found is displayed.

 Select UNBEND mode.

The last bend is displayed, you immediately can remark the collision.

If a solution without collision is displayed, press the

key and see if the software furnishes a solution. If no solution is proposed, that means that there is collision. Program or change in the FACE field the different faces and see which possibilities exist.

 Press the

key to move in the previous sequence.

If the software finds a solution, this will be displayed immediately as well as the other possible faces (field PR FACE = proposed face).

In unbend mode the proposed faces are displayed in the PR FACE field. So the operator can introduce one by one the proposed faces in the FACE field, in order to see the result.

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Page 33

BENDING SPEED

Page: BEND NUM This field allows to reduce the bending speed. It is programm able in % of the

maximum bending speed.

BG (BACKGAUGE) OR STOP

Pages: BEND NUM, BEND 2D Displays or allows to select the stop for the current sequence. The DNC recalculates the target value of the X and R axes as a function of

the choice. Display the round robin list and choose a stop appropriate for the sequence.

This field will not appear if only one stop is defined in the machine parameters.

Changing the stop on the BEND 2D page

See also Tolerance.

DEFINITIONS PAGE 41

Page 46

Programming example

 Call the PRODUCT NUM page.  Introduce the tools and the material in the usual way.  Introduce the product dimensions with the internal radius of the ideal

curve in the Ri column.

 Introduce 99 in the CR field, the softwar e will calculate the maximum

number of bends for this ideal curve (see fig. above).

 Start the calculation (via Action menu) to obtain the unfolded length,

the tolerance (see Tolerance) and the number of bends for the ideal curve.

 Call the BEND 2D page.

 Make sure that the SIMULE field is on WITHOUT IMPOSED

BEND.

 Choose SEARCH BENDING ORDER (via the Action menu).

 Then pass in semi-automatic

to programming mode).

 Simulate the bending with the

PAGE 42 2D REFERENCE MANUAL MODEVA/DNC 880S

(on PC key F8 and F10 to return

key.

Page 47

Programming example for a gutter

To realize the above type of product:

 Call the PRODUCT NUM page.  Introduce the tools and the material in the usual way.  Introduce the product dimensions with the internal radius of the ideal

curve.

 Introduce 99 in the CR field, the software will c alc ulate the maximum

number of bends for this ideal curve (see fig. above).

 Start the calculation to obtain the unfolded length, the tolerance and

the number of bends for the ideal curve.

 Call the BEND 2D page.

In the actual state of the software, the automatic simulation of this example product will not give a result. The UNBEND mode must be used to impose semi-automatically the order of bends. In the example below, the bending order has not been modified. The operator is free to do so during this procedure.

DEFINITIONS PAGE 43

Page 48

 Select UNBEND mode.

The product is displayed in the tools with the last programmed bend.

 Introduce the face which must be bent last (3 in this example)

When leaving the FACE field, the software displays the chosen bend.

 Place the cursor on the STOP field and modify the stop if necessary.

For this product the stop 4 proposed automatically has been conserved. In spite of the "collision" visible in this situation, there will not be any collision due to the ideal curve (see further on under simulation in semi-automatic mode).

 Press the

The software displays the previous bend (another bend can be selected by programming in the face field the one required). The proposed stop (5) is conserved but can also be modified.

key.

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Page 49

 Repeat the operation above until you have reached bend No 1.

 Change to semi-automatic mode

 Visualize the result step by step by pressing the

(on PC press F8).

Pg Dn

key for each

bend made. (On PC, to return to programming mode press F10).

Remark: In this example, the stop is equipped with an R axis. The

software thus calculates its position automatically as a function of the ideal curve. If your DNC is not equipped with an R axis, a vertical stop can be fixed perpendicular to the original stop.

DEFINITIONS PAGE 45

Page 50

INDEXING AXES

Page: MACHINE INITIALIZATION DNC / ENC, Action menu. The INDEX AXES function allows to index or index the axes once again (if

already done). If the DNC has not been indexed, this function will have the same effect as if

the Start button If the DNC is already indexed, this function allows to re-index the axes without switching the power off. In this case the DNC will ask the operator to confirm this operation. Make sure that the beam is loca ted underneath the indexes !

had been pressed in order to index the DNC.

INSERTING A SEQUENCE

BEND NUM page

To insert a sequence:

 Position the cursor in the BEND field, then take position on the

sequence you wish to insert (for example 2) using the key.

 Select INSERT BEND (Action menu).

The inserted sequence will take place 2 in our example and displace the sequence 2 to position 3. An inserted sequence is empty.

If you wish to insert a sequence and copy its contents, you must proceed in the same way, but you must choose COPY A BEND (Action menu).

BEND 2D page

This possibility is used, for example, for effectuating special work (Punching, modelling, etc.) which cannot be represented graphically.

On the BEND 2D page, if a sequence is inserted, the graphic of the previous sequence is always displayed. This sequence will NOT be represented graphically. A sequence inserted in this way is empty. You must go to the BEND NUM page to modify the inserted sequence.

PAGE 46 2D REFERENCE MANUAL MODEVA/DNC 880S

Page 51

To insert a sequence:

 Position the cursor in the BEND field, then take position on the

sequence you wish to insert (for example 2) using the key.

 Select INSERT BEND (Action menu).

The inserted sequence will take place 2 in our example and displace the sequence 2 to position 3. An inserted sequence is empty.

INTERNAL RADIUS

Pages: PRODUCT NUM, BEND NUM The internal radius is calculated automatically as a function of the sheet

metal thickness and the tools. This calculated radius is only valid for air bends.

If the radius of the punch is greater than the natural internal radius of the sheet, it is that of the punch which takes precedence.

It is possible to impose the radius in order to adapt the calculation of the unfolded length and the calculation of the stop positions at best for a particular material. To do this:

 Program the radius in the relevant field.  Program the CR field at 1.

DEFINITIONS PAGE 47

Page 52

KEYBOARD

External keyboard for the DNC

In case of necessity, it is possible to connect a 100% PC AT compati ble external keyboard to the rear of the numerical control..

Attention: The DNC must be disconnected from the power supply to

connect the keyboard, otherwise correct functioning may be impeded.

When an external keyboard is connected to the DNC, the front panel of the numerical control remains perm anently active.

L. BENDING

Pages: PRODUCT NUM, BEND NUM Bending length, sometimes called "bending width", means the distance

between the two extremities of a bend. If the product is programmed on the PRODUCT NUM or BEND NUM

page, the bending length must be entered by the operator. This value is indispensab le f o r the software to be able to aut o matical ly calculate the pressure, the crowning and or the axis separation (Z1 and Z2) of the machine.

With the 3D software version and if the programming is realized in 3D, this value is treated automatically by th e software.

PAGE 48 2D REFERENCE MANUAL MODEVA/DNC 880S

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LANGUAGE

Pages: WELCOME or MACHINE PARAMET E RS The software generally possesses a choice of several languages.

The composition of these languages varies depending on the manufa cturers request.

To switch languages:

 Call the WELCOME page.  Key on position 2.

 Place the cursor on the LANGUAGE field.

 Press the

the available languages.

 Place the cursor on the language required.

 Validate the selection using the

key or click right to display the round robin list with

LEAVING THE SOFTWARE

To switch off he machine proceed as follows:

 For safety reasons:

Lower the machine beam in to the tools or on to the blocks of wood or metal.

 Stop the main motor.

 Press the MENU

 Validate with the  In the new window select TERMINATE.

 Validate with the  Wait until the screen of the DNC becomes black and gives the

message EXECUTION TERMINATED. Under Windows, the DNC will automatically leave Windows and give a message when the system is ready to switch off the supply.

 Switch off the mains supply to the DNC or the machine.

key.

key and select QUIT.

key.

DEFINITIONS PAGE 49

Page 54

On a PC proceed in the same way or:

LEG

 Press simultaneously the  Click on TERMINATE.

Page: BEND 2D Allows to select a different leg than the one displayed for the current

sequence. See also Bending Order and BG (Backgauge) or STOP.

 Select the required bend using the

and keys.

and key.

Leg on the 0 face

 Place the cursor in the LEG field.  Introduce the N° of the face which must be resting on the back gauge

(3 in this example).

 Press the

key to validate the modification.

Modified leg

PAGE 50 2D REFERENCE MANUAL MODEVA/DNC 880S

Page 55

LENGTH

Page: PRODUCT NUMERICAL This field expresses the length of a segment (see examples in the User

Manual) and indicates that you are in L-alpha mode. That is a length is entered, then the corresponding angle, the following length, the angle, etc.

Sometimes the drawing which is used as a basis for the realization of the product does not allow to program easily in the L-alpha method. You can switch to the LU / LW cotation method using the LENGTH round robin list and thus program in coordinates.

This is a facility which unfortunately is not standardized. The results can thus vary slightly depending on the case.

LOW SPEED DISTANCE 

Page: BEND NUM Allows to define that only a portion (expressed in %) of the upward

movement between the lower dead center and the clamping point will be carried out in low speed, the remainder of the upward movement being done in high speed. If BENDING SPEED  has been programmed and LOW SPEED DISTANCE  is not programmed, the upward movement up to the clamping point is carried out in low speed. (= 100%).

MACHINE PARAMETERS

Pages: MACHINE PARAMETER These pages contain the parameters necessary for the functioni ng of your

machine. It is very important to have a backup copy on disket te (see Data Transfer). If any problems occur, you will save a lot of time if you have to re-introduce them.

Under no circumstances should the machine parame ters be modified

without the consent and the support of the machine manufacturer. Erroneous programming can cause important damage to the material

or render the machine dangerous.

DEFINITIONS PAGE 51

Page 56

MAINTENANCE

Maintenance of the numerical control is restricte d to the changing of the filters and the cleaning of their housing at regular intervals.

Change of filters

It is important to regularly (o n c e per month) change the filters of the fans of the numerical control. If this maintenance is neglected, the numerical control might build up exaggerated heat and cause damage which can sometimes be irreversible.

 Interrupt the main power supply.  Remove the 4 screws of the protection grid.  Change the filter.  Install the protection grid again.

Cleaning of the DNC

Interrupt the main power supply. Clean the keyboard, the casing and the rear panel with a humid cloth and

some liquid soap. Dry with a clean and dry cloth.

Never use alcohol-based products nor solvents (trichlorethylene, thinner, acetone or the like).

MANUAL ADJUSTMENT OF THE BACKGAUGE

In many cases, the backgauges are not equipped with Z axes enabling lateral displacement of the gauge fingers. In other cases, the operator m ust change the gauge configuration by hand or add some accessories. To do this, he had to either intervene from behind the machine, or else stretch his arms across the machine below the b eam. In order to facilitate thi s task and to provide increased safety, it is now possible to program specific positions for the X and R axes and/or auxiliary functions in GAUGE management mode. The purpose of this is to place the backgauge forwards above the die (provided that the machine allows for this possibility), so as to enable the operator to carry out his task easily and without danger staying in front of the machine.

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Page 57

Ideally, the machine manufacturer would conc eive a mechanical or electric/pneumatic system that unlocks the gauge fingers within this adjustment position, and locks them again once the gauge is leaving this location. The gauge positions for this operation can be programmed in the ma chine parameters page called SP ECIAL CY CLES.

 The beam must be located in its max. TDC.

When the numerical control is in semi-automatic or automatic mode, the operator activates this special cycle from the BE ND NUM page by means of the ADJ.GAUGE function (ACTION menu).

 The operator will then have to confirm each step of this cycle by

clicking inside the appropriate dialogue window.

 At the end of the cycle, the gauge returns to its orig in al location.

MODIFYING THE ORIGIN OF THE AXES

Page: MACHINE INITIALIZATION DNC/ENC General remarks: This page allows to modify the origin of the axes of the machine, to consult

the position of the axes (POSITION field), the index (INDEX field) and the limit switches (LIMIT+ and LIMIT- fields).

The second part dealing with erasing the memorie s i s dealt with in the Erasing Memories section.

It is understood by "modification of the origin" (also called "setting an axis") to impose a value (at the moment of the operation) in the electronic position counter of the numeric control. This operation is used to correspond the mechanical position of the axis with the position of the electronic counter.

This procedure is usually done for the stop axes or the auxiliary axes. For the beam, the latter executes automatically during indexation of the beam.

Setting an axis is most often used to correct a shift of the back gauge. That is to arrange that when the X axis indicates 0.00 on the position counter, the backgauge is situated exactly on the bending line (this definition is valid for the LEG type of stop). If this is a temporary change (caused by a shifted tool for example ), it is recommended to use corrections rather than setting the axis.

DEFINITIONS PAGE 53

Page 58

Attention: certain manufacturers equip the back gauge with an index. In this case modifying the axis origin will only have a limited effect just until the next indexing. If you have to permanently modify the origin of an axi s, please contact the machine manufacturer.

Setting an axis modifies the origin of the axis. If this operation is

incorrect, it can damage the machine and/or the tools. The axis can for example enter into collision mechanically with another element. In the least case, the products produced will be inexact. Setting an axis must thus be done with precaution. The person who undertakes this operation must be perfectly awa re of the consequences.

To modify the origin of the axes, proceed as follows:

 Check that the axis concerned is no longer in movement.  Change the numerical control to programming mode.  Access the MACHINE INITIALIZATION page.  Key on position 3.  Place the cursor on the required axis in the REQUESTED column.  Introduce the new position.  Action menu: Select VALIDATE.

The new position is displayed in the POSITION column.

To control the new origin of the axis proceed as follows:

 Remain on the MACHINE INITIALIZATION page.  Change the numerical control to manual mode.  Place the cursor on the required axis in the REQUESTED column.  Introduce a value to be reached.

 Press the

key on the front panel.

The axis must move to the requested position.

 Control the result and correct if necessary.

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Page 59

PARAMETRIC PRODUCT

Function: Possible only in 2D mode. Enables a simply and rapid modification of a given and repeated profile by

programming only predefined parameters. On the basis of a product created in PRODUCT NUMERICAL, the operator

has access to the modifications of the product, but only on parameters which have been defined with minimum and maximum values in the parametric product. The activation or disactivation of this function requires the key in position 3.

Activation of the function

Parametric product

 Call the MACHINE P ARAME T ER S.

 With the help of the

presented window and select the option YES next to the Product parametric field.

and keys, display the above

Create a parametric product

To create a parametric product, proceed as follows:

1. Creation of the numerical product in the usual manner.

2. Definition of the parameters.

3. Activation of the parameters.

4. Memorization of the product.

5. Working with the parametric product.

DEFINITIONS PAGE 55

Page 60

Step by step:

Example of a profile

 Press the function key PRODUCT (

PRODUCT NUMERICAL.

Below, a model profile of a product that often will be manufactured, but whereof certain parameters have to be modified, according to the demand.

) and select

 Press the function key PRODUCT (

PARAMETERS PRODUCT NUM as below.

) and select

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Page 61

The parameters A to H are those 8 parameters which afterwards can be modified.

Columns: Caption: enables to briefly describe the modifiable parameter.

Min, Max, Suggested enable to fix limits and a default value.

The following window opens:

 Decide and fill in the fields of the parameters you wish to make

modifiable.

Click right or

to select the parameter to be associated with the face.

 Associate the defined parameters with the different faces and angles

you wish to change. By opening the choice list, choose in the concerned field the variable parameter which will be associated with this field.

DEFINITIONS PAGE 57

Page 62

For example:

 Face 1 associated with parameter A.  Faces 3, 5 and 6 associated with parameter B.  Face 4 associated with parameter C.  Angle face 2 associated with parameter D.

After having finished the definition of the parameters, it is advisable to activate them, in order to make the product parametrable.

 Activate the parameters. PARAMETERS: ACTIVE.

 Press the function key PRODUCT (

) and select

PRODUCT NUMERICAL.

The product numerical page has now changed, only the previously defined parameters are displayed and modifiable.

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Page 63

Working with a parametric product

 As for a normal product, place the cursor on the VALUE field of the

parameter you wish to modify. On the profile drawing, a circle indicates the face associated with this parameter. Enter the new value and leave the field.

 The system recalculates automatically the new profile as well as the

new unfolded length.

If you wish to change other values, or to modify the product profile, you have to disactivate the PARAMETERS function in the PARAMETERS PRODUCT NUM page.

DEFINITIONS PAGE 59

Page 64

PRODUCT GROUPS

Page: PRODUCTS GROUP via PRODUCT menu. This page allows to create groups of products in order to realize sets.

Definitions

A group is represented by a list of product numbers and typically corresponds to an assembly of several parts.

Any one product can be part of several groups. In a given group, a product can be present several times. During execution of a group, the products can be chained either

automatically, or only upon the operator's request (manual chaining). It is possible to define several groups. The groups must be given a number

which is greater than 90000. A "quantity needed" and a "quantity done" can be assigned to each defined

group. Chainings:

1. Automatic chaining: The parts are produced in the quantity and in the order in which they appear within the group. The groups are produced one after the other until the required quantity has been reached.

2. Manual chaining: After each produced part, the operator explicitly designates the next part to be carried out.

In the example above the DNC executes twice the product 1 (24031), then once the product 2 (24033), and finally five times the product 3 (24034), and then recommences 56 times.

2 x

24031

PAGE 60 2D REFERENCE MANUAL MODEVA/DNC 880S

56 x

1 x

24033

5 x

24034

Page 65

T o create a group of products:

 Column PRODUCT: enter the product number (the product must

exist).

 Field QUANTITY NEEDED: enter the number of sets required.  Field QUANTITY DONE: enter the number of sets which have

possibly already been produced.

 Memorize the group under a number between 90'000 and 99'999.

The function key DRAWING GR. (only 3D version) displays graphically the outline of the products (for as much as these products were created in 3D) forming the group.

The AUTOMATIC PRODUCT CHAINING field indicates to the DNC that it can automatically chain the products i n the order described in the table (see example above).

The MANUAL PRODUCT CHAINING field causes that the DNC effectuates the number of products specified in the table, then at the end of that series it displays the PRODUCT GROUP page with the cursor on the PRODUCT column (even in automatic mode). The operator must then select

another product and press the

112 x

24031

The NEXT GROUP field is only an information field which allows to specify to the operator the following group of products to be realized.

key to load and execute the said product.

56 x

24033

280 x

24034

Working example in the PRODUCTS GROUP page

 Edit a group composed of a set of products (make sure that all the

products have been defined beforehand).

 Pass in automatic mode

If the group contains any errors, the message "INCOMPLETE GROUP" appears on the screen. It is possible to choose the first product to be executed by positioning

the cursor on the product before pressing the auto

key.

 The semi-auto

In order to allow that the execution can be resumed according to the chaining mode, it is necessary to memorize the group in the moment of interruption (this will make sure the quantiti es needed and the quantities done be saved).

DEFINITIONS PAGE 61

and manual keys interrupt the execution.

Page 66

PRODUCT INFORMATION

Almost all pages: ? or ! Field (situated in the left hand corner of the screen).

For each product saved, commentaries and / or images can be annexe d in order to furnish the operator specific information for that product..

In this way the information is permanently avai lable. Two main possibilities are offered:

Text

 Text only

In this case only the small window appears.

Text and images

 Text and images

In this case the complete page is displayed. With this choice, it is possible to display photographs, drawings or other graphical information. The software automatically recognizes the DXF, IGES and PCX file formats (see PCX Files or DXF and IGES Files which follow in this chapter).

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See an Information

 Move the cursor on to the ? or ! symbol and press the key or

click. If information is available the ? field changes into a ! field.

It is possible to display the PRODUCT INFORMATION window automatically (only if it contains a commentary) each time the operator calls a product. To do this, you must program in the machine parameters, on the

CONFIGURATION page, the parameter Automatic display of product information at YES.

Creating an Information (text only)

 Display the PRODUCT INFORMATION window (c lick on ?).  Click on VISUALIZE and select EDIT (on the DNC: key on 2).  Select SIMPLE in the round robin list field.  Create the text. At the end of each line go to the next line by pressing

Programming info and / or images

the

 Click on EDIT to go in to VISUALIZE mode then leave.

key.

Creating an Information (text and images)

In the procedure described below, it is accepted that the photographs (drawings or images) have already been created and their location is known (see also Active Peripherals). For the creation of numerical photographs or images etc., you must refer to the apparatus documentation as well as to the software associated with the apparatus (numerical camera, scanner etc.) or to the drawing software for the creation of graphical information.

It is recommended to store the images on a server (connected to the DNC by a network) and not in the internal memory of the numerical control, as image files occupy a lot of space.

DEFINITIONS PAGE 63

Page 68

To introduce the images:

 Display the PRODUCT INFORMATION window.  Click on VISUALIZE and select EDIT (on the DNC: key on 2).  Select WITH COMPLEMENTS in the round robin list field.  Create the explanation text.  Position the key on 1 or 0 or click on EDIT and select VISUALIZE to

secure the message.

 Introduce on one line the name of the graphic file (1 per line)

With or without generic characters (* or ?). See further below the explanations about generic characters and where the software has to search the image files. In the above example, >P256.PCX indicates to the software that it must display the image in the P256.PCX file when the PRODUCT INFORMATION page is first called. To display the PLI3.PCX and PLI4.PCX images, position the cursor on the relevant line and select DISPLAY via the Action menu.

 Click on EDIT to go to VISUALIZE mode then leave.

The symbol > indicates that the image which follows will be displayed automatically. If the file name is indicated alone, the software will go and search for it on the path described by the peripheral designated under the COMPLEMENTS IN field (See Active Peripherals). If the complete path is furnished, the software ignores the peripheral.

The generic characters * and ? allow to select several files.

To display them position the cursor on the line and press the

key.

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Page 69

For example *.PCX will display all the PCX files which are lo c at ed in the directory designated by the path of the images peripheral.

1= Line which designates the file

to be displayed.

2= Name of the peripheral where

the files are located.

3= Name of the file currently

displayed on the screen.

4= Number and quantity of files

if the characters * or ? are used.

PCX Files

The software allows the display of images in PCX format with 16 or 256 colours. You can use for example an electronic camera and directly display these photographs or other drawings in PCX bitmap mode furnished by a scanner or graphics software.

Example of reading a DXF file

DXF or IGES Files

The software recognizes automaticall y files in DXF or IGES format. Only files in 2D are recognized. Depending on the software used to create these files, it is possible that some parts of the drawing are ignored or deleted by our interface. To obtain more information about the reading possibilities of the DXF or IGES files, request the CYCAD manual which describes the possibilities, compatibility and limits of inter pretation.

DEFINITIONS PAGE 65

Page 70

PRODUCT MANAGEMENT

Pages: most pages. In all pages which mention the product number (PRODUCT field top ri ght),

the searching, the saving or the deleting is normally possible. This operation is done in the default memory (generally INTERNAL). However an other memory could have been selected as default memory. In this case these operations will be done in the memory designated by the active peripheral (see Active Peripherals).

It is possible to carry out these operations in a memory other than the default memory. However this possibility only exists on the PRODUCT LIST or

TRANSFER pages.

Saving, searching or deleting a product on a floppy or a network Page: PRODUCT LIST

 Place the cursor on the PRODUCTS AND GROUP IN INTERNAL

field.

 Choose the required peripheral.

Number of products in the current peripheral

Current peripheral

 Next call, save or delete the product.

The authorized range for saving products goes from 1 to 89'999. The numbers 90'000 to 99'999 are reserved for the product groups (see Product Groups).

To facilitate searching, it is recommended to add a drawing code before saving (see also Searching for Products according to Criteria and Active Peripherals).

Copying a product

 Call the product to be copied.  If necessary change the peripheral.  Program another product number and save it.

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Marking products

To facilitate the transfer of products, it is possible to select in the current peripheral the products to be transferred.

A "marked" product is designated by a small triangular mark number.

The marked products are automatically reporte d on the TRANSFER page where they appear in the transfer list. (See Data Transfer).

To mark or "unmark"products:

 Cursor on the required number.

  Use the ERASE MARKS command of the Action menu to delete all

Remark: Product marking is limited to 48 products.

key or click to mark or unmark.

the marks.

 next to the

PROGRAMMING A PROFILE

See examples in the User Manual.

PROGRAMMING ON BEND NUM

To program a profile on the BEND NUM page, proceed as follows:

 Call the BEND NUM page  Empty the programming memory.

(choice ERASE PRODUCT in the ACTION menu)

 Enter the thickness, the sigma and the type of material.

 Cursor on the PUNCH field. Press the

display the punch list, choose the required punch and validate with the

key.

key or click right to

DEFINITIONS PAGE 67

Page 72

 Cursor on the DIE field. Press the

the die list, choose the required die and validate with the

 Enter the required angle.  Enter the value of the back gauge.  Enter the values of the other axes (R, Z, etc.).  Enter the other functions of the sequence (Bending force, TDC, SP,

Axes wait, etc.).

 To create a second sequence: select COPY BEND in the Action

menu. This operation copies the current sequence into the next sequence with the same values. Simply modify t he values of this new sequence and repeat the operation for the following sequences.

See also the examples in the User Manual.

PROGRAMMING WHILE WORKING

The DNC 80 / 800 / 880S / 900 / 1200 / ModEva allow to program the numerical control while working. To this end: Program the machine parameter Programming while working (page Preferences) = YES.

key or click right to display

key.

Pass on automatic mode: the LED of the is working in automatic mode. The operator can bend.

Double mode

Pass on double mode by pressing the programming key . The automatic LED is still lighting up and the LED of the programming key is also active. From now on it's possible to use the numerical control for program ming, meanwhile the machine can continue to exe c ute the current product.

All the programming functions are accessible. Memorize, search, delete, transfer, etc.

Return to single mode

From the double mode (visualized by the two LED's Automatic and Programming simultaneously lighting up) press either the Programming key: In this case the product in programming process is displayed, or Automatic: The product in executing process is displayed.

key is lighting up, the DNC

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Q.NEEDED. ___ DONE.___

Page: BEND NUM This field is a product counter. When this software functions on a numerical

control this counter displays the number of products already done. To activate this counter:

 Enter the number of products required in the Q.NEEDED field.

and

 The quantity already done in the DONE field, or the value 0 if no

product has been created.

As soon as the two values are equal the numerical control furnishes a signal. Depending on the manufacturer this signal is treated or not to stop the machine cycle.

The values in this counter are not memorized with the product. You must change or erase these values when you call a new product.

To cancel the counter, delete the DONE field.

REFERENCE YR COR.

Page: TOOL BEND This field allows to correct the tool pair reference.

This correction is memorized with the product and not with the tools.

This correction also modifies the safety point, the pinch point and the bot tom dead

Pinch point before correction of the reference.

centre. This correction is to be used with precaution. An error in this field can impede the correct functioning of the machine, cause i mportant material damage or make the machine dangerous.

PCV

PSS

PCT

0 Référ ence

PCV

PSS

PCT

0 Réf.

PCV

PSS

PCT

0 Référence

Pinch point after correction of the reference.

It can be observed in this diagram that the correction of the reference modifies all the switch points as well as the bottom dead centre.

DEFINITIONS PAGE 69

Page 74

SCREEN CAPTURE

The ModEva/DNC 880S software allows to copy screens easily to create documents or other information (offers, etc.).

To capture the screens proceed as follows:

 Start up the word processor or other software into which you wish to

import the screens.

 Start up the ModEva/DNC 880S software.

 Capture the active window by pressing the

The image is transferred to Windows clipboard.

 Activate the software into which you want to insert the capture by

and

Print Screen

keys.

pressing simultaneously the times, according to your current applicati on.

 Insert the image using the Paste function in the Edition menu of your

word processor. Reduce or cut the image according to your needs.

You also can use the screen capture tools specially destined to this type of application and which can immediat ely convert the colour captures in grey levels. These softwares are for example Corel Capture (included in Corel Draw) or Hardcopy, a freeware software available on Internet www.hardcopy.de

and keys once or several

BLACK AND WHITE, COLOUR

In order to facilitate the creation of illustrated documents with screen copies, it is possible to switch the ModEva/DNC 880S software to black and white.

Proceed as follows:

 Call the machine parameters, TESTCARD AND SCALES page.

 Select BLACK/WHITE in the TEXT AND DRAWINGS field.

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SCREEN PRINTING

It is advised to switch the software to BLA CK /WHITE before starting to print.

Selecting a printer

 Call the machine parameters, TESTCARD AND SCALES page.

 Windows Version

The printer selecting under Windows is not effective. It is the printer defined by default in the "Parameters – Printers" menu of Windows which determines the printer. Attention: if you change the printer ("Parameters – Printers" menu of Windows) while ModEva/DNC 880S is working, you have to leave and to start ModEva/DNC 880S again, in order that the new printer is taken into account.

 Select the destination. If the line is empty, PRN is used by default.

You can enter LPT1, LPT2 or the name of a file. By entering NUL in the destination field, printing is prohibited and the relevant line in the ACTION menu will disappear.

Printing

To print a page:

 Select the relevant page.

DEFINITIONS PAGE 71

Page 76

 Call the ACTION menu and select PRINT SCREEN.

To print all the parameter pages:

 Go to the parameter page from which you wish to start (for example

the first page of the N2X parameters).

 Call the ACTION menu and choose PRINT PARAMETERS.

The software will print one after another all the parameter pages (including sub-pages). You can stop printing by pressing any key (for example at the end of the N2X parameters). Printing does not stop immediately, the current page is terminated.

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SEARCHING FOR PRODUCTS ACCORDING TO CRITERIA

Page: SEARCH PRODUCTS/CRITERIA

This page allows to search for products stored in the peripheral selected in the PRODUCT LIST AND GROUPS IN field. The selection criteria can be combined. When 2 or several fields listed below are filled, the product searched for must satisfy each of the programmed

criteria. It is a condition AND (one and the other fields.....).

Search criteria Are used as search criteria: the date of memorization, the product number,

the material thickness, the code number (drawing), the bending length, the tools and the unfolded length. Small letters are distinguished from capital letters.

Attention: searching with the criteria PUNCH or DIE, is only done on the "main" tool which is programmed on the PRODUCT NUM page. This means that if a product is programmed using only BEND NUM page and you wish latter to search for this product using the tools, you must program the "main" tool again on the PRODUCT NUM page, without which the search will not find this product.

If the complete contents of the code number is not known, it is possible to use the special characters (wildcards) to replace the unknown characters (for the other fields if they are filled, the contents must be known entirely).

? *

In the example below, it is supposed that the search criteria is only the drawing number. It goes without saying that the “wildcards” can be used in the other fields.

Example Explications A?C*

*22 A product is searched for whose code ends with 22.

Any character (1 only). None or several characters.

A product is to be searched for whose code starts with an A, then an unknown character, , a C and then several unknown characters. (e.g. ABC, ACC22, AmCh22, A6CProduct33).

(e.g. ACC22, AmCh22, 22, Product22)

DEFINITIONS PAGE 73

Page 78

A?C*22 A product is searched for whose code begins with an A,

then an unknown character, a C and ends with 22 (e.g. ACC22, AmCh22, AVCProduct22).

*A?C*22 As above but A?C is not necessarily at the beginning

(e.g. ACC22, AmCh22, PARC22).

*A?C*22* As above , but 22 is not necessarily at the end.

(e.g. ACC22, AmCh22, PARC22bis).

MEMORIZATION DATE

The memorization date of a product can be used as a search criteria for products. To do so a time span is specified in which the search for information is made.

If the introduction syntax is wrong a message appears in the interactive field "SYNTAX DATE!".

The introduction format is DD/MM/YY (D=day, M=month, Y=year).

On the numerical control the days, months and years.

The choice of the type of separation is configurable on the WELCOME page.

or key can be used to separate the

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SECTION

Pages: PRODUCT NUM and BEND 2D A section is an imaginary line which "cuts" the product lengthways and

which defines a profile. It is this profile that the operator sees on the BEND 2D page.

A product can have several sections (in the example below, 2 sections). Each section is considered as a separate profile.

The operator will mainly use the PRODUCT NUM page to program one or more profiles (see the manual User Guide and Programming a profile in this manual).

The creation of the sections is automatic if the product is programmed in 3D.

SIGMA

Pages: PRODUCT NUM and BEND NUM

Enter in this field the value in Kg/mm product.

Example:

Steel AC37-2 K 38,22 Kg/mm Stainless steel X5CrNiS18 8 51 à 71 Kg/mm2 Aluminium ALMg2,7Mn 24,97 Kg/mm2

of the material used to effectuate the

DEFINITIONS PAGE 75

Page 80

SIMULATION CRITERIA

Page: BEND 2D (choice of ACTION menu) Before starting an automatic search for the range of bends, it is possible to

define a certain number of criteria which the system will take into account when it calculates the bending order.

The simulation criteria are always valid such as they were defined the last time.

There are two groups of simulation criteria:

SECONDARY

MAIN

NB. MAX. OF BENDS AGAINST BG

MIN. LENGTH AGAINST OPERATOR/ TOTAL L

These are preference criteria. They are applied as far as possible. Not respecting these criteria does not prevent the software from finding a solution.

These criteria are imposed. The software will search for a solution which respects imperatively these criteria. These main criteria can lead the software in to not finding a solution.

Limit the number of bends (already realized) situated between the backgauge and the bend to be realized.

The system will search for a solution which allows always to leave a minimum length (expressed in % of the total unfolded length) on the side of the operator.

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Page 81

Swing

Return

Axe de

retournement

Axe de

basculement

= retournement

+ pivotement 180°

Axe de

pivotement

Flipover

MINIMUM OF SWINGS

The software will choose the solution which demands the least possible number of swings.

MINIMUM NUMBER OF RETURNS

MINIMUM NUMBER OF FLIPOVERS

OPTIMUM MANIPULATION

The software will choose the solution which demands the least possible number of returns.

The software will choose the solution which demands the least possible number of flipovers.

The software will choose the sheet manipulations which are the most favourable for the operator, as a function of the sheet thickness and its relation length / bending length. The choice of this option has priority over the previous criteria.

SECTION ERROR ON FACE

PRECISION BETWEEN FACE -AND --

FLEXIBILITY

The software arranges that the section error is located on the specified face.

The software will search for a solution allowing to attain the maximum precision between the specified faces.

Normally the software does not except that the product knocks against a part of the machine during bending. When this criteria is validated, the software accepts that a part of the product knocks against a point of the machine with a flexibility in % of the length of the sheet between the bend and the end of the product on the side of the profile which enters in to collisio n.

DEFINITIONS PAGE 77

Page 82

40mm = 20% of 100 + 60 + 40

100

In this example, a flexib ili ty o f 20% authorizes the sheet to theoretically "penetrate" 40 mm in to the punch.

Tip If a product is very complex, it can be interesting

to program 100% of flexibility to be able to annul the collision criteria, in order to be able to visualize the bending order proposed by the software. This criteria is then reduced to an acceptable value.

STOP AGAINST A SLOPE SEGMENT

By default (NO), the system prohibits the situation illustrated below

and only allows the stops

By programming this option YES, the software will also authorize the stop on angles greater than 90° (1st case above).

To validate the criteria chosen for a simulation, cl ick on the QUIT field or press one of the function keys to access a new page.

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Page 83

SP (SWITCH POINT)

Page: BEND NUM The switch point (SP) is a distance expressed in millim etres starting from the

pinch point. It defines the point at which the beam passes from the approach speed to the bending speed.

This possibility is used when you wish to have a long and slow approach to the sheet for a specific work.

If it is not programmed, this point is autom atically calculated so that the beam has changed to the bending speed before arriving at the safety point.

SP (switch point)

PCV

If the sheet is approached as shown in the figure above, the punch will reach the surface of the sheet on high speed. By modifying the SP, the switch over can be regulated in such a way that the sheet is approached in the bending speed.

DEFINITIONS PAGE 79

Page 84

SPECIAL BENDS

BEND 2D page

To carry out certain products, it may be necessary to use special bends. The software is capable of handling several types of bends.

The following choices are available:

NORMAL Conventional bend, without any particularity. PRELIM. Designates the current bend as being a

preliminary bend.

FINAL Designates the current bend as being a final

bend, i.e. it terminates a former preliminary bend.

UNBENDED To be used in the BEND NUM page only.

This option only indicates to the operator that the bend is in fact an unbending process. The software does not react in any particular way.

CLOSED Same remark as above for "Unbended". FICTITI(OUS). Same remark as above for "Unbended".

PRELIMINARY / FINAL BEND

To illustrate the use of a preliminary and a final bend, the example of an "S"-shaped product is used. Typically, this product is not feasable without a preliminary bend.

PAGE 80 2D REFERENCE MANUAL MODEVA/DNC 880S

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PRODUCT NUM page

BEND 2D page

 Enter the data as follows:

In the BEND 2D page, it is necessary to manually define the bending order because this product is not feasible without a preliminary bend.

Proceed as follows:

 Cursor on FACE, enter 1.

The software indicates the possible stop positions (PR. STOP 0 5 on the first line).

 Cursor on LEG, enter one of the suggested stops (0).

 Press

Pg Dn

DEFINITIONS PAGE 81

Page 86

 Position the cursor on the number (2) of the BEND field.  Select the INSERT BEND function (via the Action menu) to insert

the preliminary bend sequence. It can be seen that the bending sequence now contains 5 bends (also see Inserting a Sequence in this manual).

 In the round-robin list of bend types (default: NORMAL), choose

PRELIM.

Enter the desired preliminary angle in the ne w field ___._° (135.0° in this example).

 With the cursor in the FACE field, enter the face (2) for the

preliminary bend.

 With the cursor on the LEG field, enter one of the suggested faces

(1 in the present example).

 Select the SIMULATE BEND function (via the Act ion menu) to see

the bend.

 Press

Pg Dn

to move on to the 3rd bend.

PAGE 82 2D REFERENCE MANUAL MODEVA/DNC 880S

Page 87

 With the cursor on the FACE field, enter the face (4) of the current

bend.

 With the cursor on the LEG field, enter one of the suggested faces

(5 in the present example).

 Select the SIMULATE BEND function (via the Action menu) to see

the bend.

 Press

Pg Dn

 With the cursor on the FACE field, enter the face (3) of the current

bend.

 With the cursor on the LEG field, enter one of the suggested faces

(4 in the present example).

 Select the SIMULATE BEND function (via the Action menu) to see

the bend.

 Press

Pg Dn

for the last bend.

DEFINITIONS PAGE 83

Page 88

In this bend, the preliminary bend made before must be terminated. You must thus indicate to the software that this is a final bend, and also specify the corresponding bend (face).

 In the round-robin list of bend types (default: NORMAL), choose

FINAL.

 With the cursor on the FACE field, enter the face (2) of the

preliminary bend.

 With the cursor on the LEG field, enter one of the suggested faces

(1 in the present example).

 Select the SIMULATE BEND function (via the Act ion menu) to see

the bend. The product is now finished.

Here are some remarks regarding this example:

 It is also possible to change the type of stop.  Several "preliminary" / "f in a l" b en ds may exist in the same section or

product.

Hint If you forgot to insert the preliminary bend sequence, and the sequence for

the final bend is missing, it is not necessary to start all over again. You can simply insert a sequence at the end of the product by proceeding as follows:

 By means of the

Pg Dn

key, go to the last sequence (unless you are

already there).

 Place the cursor on the BEND field (in this example 4) and enter 5.  Select the INSERT BEND function (via the Action menu).

Hint To carry out a U-shaped profile with long side flaps, it is generally necessary

to make a preliminary bend which must be "unbended" in the fi nal stage.

PAGE 84 2D REFERENCE MANUAL MODEVA/DNC 880S

Page 89

Proceed as follows:

 In the PRODUCT NUM page, program two lengths corresponding to

half the segment on which the preliminary bend will be made.

 Program an angle of -180.0° for the "unbending" bend.  In the BEND 2D page, enter a preliminary bend of 135°; on the last

sequence, enter a FINAL bend (as described earlier). Note: in the BEND 2D page, the drawing appears inverted. This is a known problem which has not yet been solved.

 In the BEND NUM page, correct the angle of 180° by a value < 180°,

in order to compensate the springback. If this operation is not done, the calculated value of Y will be equal to the PP (pinch point), and in this case the DNC considers this sequence as a sequence without bend. See Sequence without Bend.

START AXES/AF

Page: BEND NUM. This function allows to choose the starting moment of the axes and auxiliary

functions according to two predefined modes.

AUTO The axes and auxiliary functions start according

EXTERNAL The axes and auxiliary functions start when a

to what has been determined in the machine parameters, but at the latest when the beam reaches the top dead centre. The departure of the axes differs according to what is programmed in the machine parameter 60 Axes starting point/FA.

command is given by the operator. This command will be either:

- a descent command (via the pedal or two handed post). In this case the beam will not descend but the axes and auxiliary functions will position themselves, a second descent command will be necessary to move the beam.

- or pressing the

- or by activating the External Start input of the numerical control which, for the user, can be a button especially foreseen at this end by the machine manufacturer .

key on the front panel,

DEFINITIONS PAGE 85

Page 90

TDC (TOP DEAD CENTRE)

Page: BEND NUM The top dead centre (TDC) is a distance expressed in millimetres starting

from the pinch point. It defines the point at which the beam will stop during its ascent cycle.

The top dead centre is calculated automatically when an automatic search for the bending range is effectuated. However the operator remains free to modify this value on the BEND NUM page.

TDC (Top dead center)

If no value is programmed, the beam will rise to the maximum distance of its course as defined in the machine parameters.

The beam will not go any higher than the maximum top dead (FDC+) programmed in the machine parameters.

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Page 91

TOLERANCE

Page: PRODUCT NUM This field is only displayed (calculated) if the operator imposes a bending

radius. Typically the tolerance will be used when programming with ideal curve.

The tolerance is displayed afte r th e start of the CALCUL.

R1 = bending radius entered by the operator.

Ri = Bending radi us ca lculated by the system.

In the case of a single bend, if the operator imposes a radius (See Internal Radius and Ideal Curve (CR)), the tolerance indicates the value of the above illustration:

Ri = Theoretical bending radius requested by the operator. A = Apothem

If the value in the CR field is between 4 and 99, this tolerance indicates the difference between the chord enclosed by two bends and the theoretical arc of the circle, that is the difference between the theoretical radius Ri and the apothem A of the chord.

DEFINITIONS PAGE 87

Page 92

TOO SHORT SEGMENT AUTHORIZED

Page: TOOL BEND. This is a safety feature which is tested when passing to AUTO or SEMI-

AUTO mode. Depending on the case, it generates an error message which displays the TOOL BEND page and points the cursor in this field.

This message warns the operator that the segment is too short and does not rest correctly on the two edges of the die throughout bending.

Segment too short

TOOLS

The operator can choose to ignore this control. Three options are available:

ON THIS BEND / NO

ON THIS BEND / YES GLOBALLY

When a product is created, tooling pairs can be composed as required, which are valid for the whole product, or different for each bend. However when executing the product, the tools selected must be located in the memory pointed by the active peripheral (see Active Peripherals).

As for other data, it is possible to store the tools elsewhere than the INTERNAL memory of the software.

Default situation. A control of the segment length is made on the current bend.

No control on the current bend. No control for the whole of the current

product.

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Page 93

PROGRAMMING PUNCHES

Page: PROGRAMMING PUNCHES Three basic forms are available for programming. These forms are selected in

the TYPE (0, 1 or 2) field

0 1 2

When all the data of a punch are programmed, the tool appears in blue. When the basic tool is displayed, this is recognizable by its brown col our. When a tool is programmed, it is possible that the position of certain values

is hard to define. To visualize the predefined basic form, just click in the small box (D or E) situated on the top of the drawing. The tool then takes its basic form recognizable by its brown colour.

 Access the PROGRAMMING PUNCHES page.  Define the type of basic punch to be programmed in the TYPE field.  Indicate in the INVERSED field, if the punch is inversed.  Complete the other dimension and safety data.  Choose if necessary the peripheral (IN field) in which you wish to

store this tool.

 Enter the name (numeric or alphanumeric) of the punch in the

PUNCH field.

 Memorize the punch.

If the interactive message EXIST appears, there is already a punch with this name in the peripheral, you must either choose another name for the tool or delete the other tool and memorize again.

Some definitions of the fields on this page

REF

DEFINITIONS PAGE 89

This field indicates to the softw ar e if the leg face of the punch is the value H1 or H2.

This choice must be identical for all the tools of that machine.

The height H1 or H2 chosen as reference must be as exact as possible. The bending results depend on this information.

Page 94

The choice H1 or H2 depends on the

manufacturer of the machine. This choice is thus imposed by the manufacturer. It is imperative to respect this choice, otherwise there is a risk of collision and damage to the tools.

LINEAR FORCE <

This value indicates the maximum force supported by the tool. If the pressure calculation for the current product exceeds this value and the bending length is known, an interactive message informs the operator.

DEPTH COLLISION AUTHORIZED

If NO (default) the DNC effectuates a depth collision (see Depth Collision authorized), the operator must validate the "collision" if necessary, case by case on the TOOLS BEND page. If YES this authorization is implicit for that tool.

SAFETY XS

Prohibit the X axis from passing this limit (to avoid a collision with the punch during bending for example).

Punch safety XS

Die safety XS

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Page 95

PROGRAMMING DIES

Page: PROGRAMMING DIES When all the data of a die are programmed, the tool appears in red. When the basic tool is displayed, this is recognizable by its brown col our. When a tool is programmed, it is possible that the position of certain values

 Access the PROGRAMMING DIE page.  Indicate in the INVERSED field, if the die is inversed.  Complete the other dimension and safety data.  Enter the name (numeric or alphanumeric) of the punch in the DIE

field.

 Memorize the punch. If the interactive message EXIST appears, there

is already a punch with this name in the peripheral, you must eit her choose another name for the tool or delete the other tool and memorize again.

Some definitions of the fields on this page

Height H The height H must be as exact as possible. The

bending results depend on this information.

Ve Width of the bending V. According to the

cotation defined in the drawing below.

RADIUS r Die radius according to the drawing below.

DEFINITIONS PAGE 91

Page 96

LINEAR FORCE <

DEPTH COLLISION AUTHORIZED

SAFETY XS

Prohibit the X axis from passing this limit (to avoid a collision with the punch during bending for example).

SAFETY RS

Prohibits the R axis to approach this zone. If this is necessary, the stop will disengage before moving.

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Page 97

MODIFYING A TOOL

Pages: PROGRAMMING PUNCHES or DIES If a tool is modified and in particular the height (which wi ll modify the

calculation of the beam position) you must imper at iv ely redo the calculatio n (CALCUL) each time a product is called which uses this tool and also possible the bending order if the form of the tool is modified

To modify a tool:

 Call the PROGRAMMING PUNCHES or DIES page.  Search for the tool to be modified.

 Delete the tool.  Modify the required values.  Memorize the tool under the same name.

TOOL POSITIONS

Pages: TOOL MOUNTING or POS TOOLS The description of the mounting of a tool is described in detail in the User

Guide manual, please refer to it.

If you install several work stations, verify that it is possible to work with

these tools without any risk of collision or damage.

PUNCH LIST / DIE LIST

This page allows to display the list of punches or dies with their main characteristics.

DEFINITIONS PAGE 93

Page 98

UNFOLDED LENGTH

Pages: PRODUCT NUMERICAL The calculation of the unfolded length is realized using the CALCUL action.

However if you leave the PRODUCT NUMERI CAL page this field is automatically calculated.

The unfolded length is calculated according to the DIN 6935 standard. To obtain these standards, please refer to the competent organizations.

An extract of this standard is given below, an extract which describes the cotation method used for the stretch calculations.

The correction coefficients for the calculation of the unfolded length (according to DIN 6935), can be programmed on the Material page of the machine parameters (see afterwards).

The round robin list DIN, REAL indicates if the displayed value is a DIN value or a value entered by the operator.

PAGE 94 2D REFERENCE MANUAL MODEVA/DNC 880S

Page 99

DIN

If the DIN option is selected, the unfolded length of the sheet is calculated according to the DIN 6935 standard or corrected by the correction factor of the material (see further on in this paragraph).

REAL

If REAL is selected, the L.UNFOLD field aut orizes the introduction of the real length measured on the products. The difference between the DIN calculation and the manually imposed value is distributed proportionally on the different faces.

Correction coefficient of calculation DIN 6935

When the DIN standard does not allow to obtain calculation adapted to the real situation, the software allows the programming of correction coefficients.

The correction coefficients are programmed in the machine parameters on the Material page.

Ten coefficients numbered from 0 to 9 are available for each type of material (Steel, Aluminium, Stainless Steel, Special 1, Special 2).

The correction coefficient which you wish to apply to the DIN 6935 standard is entered in to the K filed. If not programmed the default value corresponds to 1.000. The K factor essentially corrects the DIN calculation in the bend deform ation zone (The K factor described here is not the one which is found in the DIN formula).

A judicious use of this field allows to find a solution for each material.

The use of this type of correction is done by selecting the material (STEEL in the example below) and by programming the following field with the number of the correction to be applied (2 in the example below). If the correction factor is used, the DIN field will display the corrected value with the chosen factor.

DEFINITIONS PAGE 95

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PAGE 96 2D REFERENCE MANUAL MODEVA/DNC 880S