cybelec DNC880S PC 1200 Reference Manual
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
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
MODEVAREF2D_EN.DOC TABLE OF CONTENTS PAGE 1
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
PAGE 2 2D REFERENCE MANUAL MODEVA/DNC 880S
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
TABLE OF CONTENTS PAGE 3
This page has been left blank intentionally.
PAGE 4 2D REFERENCE MANUAL MODEVA/DNC 880S
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
This page has been left blank intentionally.
PAGE 6 2D REFERENCE MANUAL MODEVA/DNC 880S
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,
or
- place the cursor on the choice and press the
key.
key.
CONVENTIONS PAGE 7
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.
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.
PAGE 8 2D REFERENCE MANUAL MODEVA/DNC 880S
), to
Software conventions, Windows version
In basic configuration, the Windows version uses the following colours:
Black Designates fixed information, designates fields
etc.
or
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).
CONVENTIONS PAGE 9
This page has been left blank intentionally.
PAGE 10 2D REFERENCE MANUAL MODEVA/DNC 880S
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
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.
PAGE 12 2D REFERENCE MANUAL MODEVA/DNC 880S
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
DEFINITIONS PAGE 13
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
PAGE 14 2D REFERENCE MANUAL MODEVA/DNC 880S
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.
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.
PAGE 16 2D REFERENCE MANUAL MODEVA/DNC 880S
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.
DEFINITIONS PAGE 17
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
PAGE 18 2D REFERENCE MANUAL MODEVA/DNC 880S
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.
DEFINITIONS PAGE 19
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).
PAGE 20 2D REFERENCE MANUAL MODEVA/DNC 880S
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
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.
PAGE 22 2D REFERENCE MANUAL MODEVA/DNC 880S
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
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
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
Pg Dn
Select the sequence to be modified (
or
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).
or
PAGE 26 2D REFERENCE MANUAL MODEVA/DNC 880S
Loading...