Cooper Tools Weller WQB OPS User manual

Camera Positioning System
WQB OPS
Operating Instruction
Version 2.2

Table of contents
1 Description
2 Safety instructions
3 System requirements
4 Commissioning
4.1 Items supplied
4.2 Commissioning of a FireWire interface card (optional)
4.3 Com missioning the camera
4.4 Installation of the "Weller OPS" image processing software
4.4.1 Installation of the driver for the FireWire interface
4.4.2 Installation of the image processing software
4.5 Problems during the installation
5 Using the "Welle r OPS" software
5.1 Introduction
5.2 Layout of the user interface
5.3 Commissioning the digital camera (only CX camera series)
5.4 Description of the menu bar and the toolbar
5.4.1 Menu bar
5.4.2 Toolbar
5.5 Description of the dialog bar
6 Positioning components with the WQB 3000 OPS
6.1 Initialising the positioning unit
6.1.1 Selecting the camera objective
6.1.2 Selecting the vacuum insert
6.1.3 Adjusting the automatic set down of the component
6.2 Calibrating the camera system
6.3 Selectin g components from the library
6.4 Positioning the circuit board
6.5 Positioning the component
7 Troubleshooting and maintenance
7.1 Mechanical adjustment of the camera
7.2 Checking the stroke of the positioning unit
7.3 Maintenance
7.3.1 Common maintenance hi nts
7.3.2 Repair and upkeep
8 Accessories (optional)
9 Appendix
9.1 Technical data
9.2 Figures

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Cooper Tools GmbH, Carl - Benz - Str. 2, 74354 Besigheim, P.O. Box 1351
Germany, Tel: [phone] - 0, Fax: [phone]
1 Description
With the new WQB OPS , Weller is again demonstrating its extensive capacity for innovation in the repair
sector and presents a new type of camera positioning system for the WQB 3000 rework system. Using this
system all common components up to a minimum length of 3 x 3 mm can be reliably and precisely placed on
circuit boards.
The heart of the positioning system is the modern FireWire
TM
CCD camera with full digital data transfer. The
high image resolution, the excellent image quality at high rates of movement, and very low image noise
create the prerequisites for universal, precise, and ergonomic component placement. The data transfer from
the camer a to the PC is made in real time via the IEEE 1394a interface using the OHCI protocol. Distortion
free pictures of the component to be placed can be achieved using the telecentrical objective lens, that s the
prior condition for a precise component placeme nt.
The component placing software includes a component library from which the component to be positioned is
selected. New components can be very straightforwardly edited and inserted by the user.
With the aid of positioning frames displayed in the live i mage from the camera, both the circuit board and the
component are aligned independently using the x, y and theta precision drives. On key press the positioned
component will be set down automatically onto the circuit board and the vacuum be switched off. This
prevents undesired movement of the component during the lift down of the component onto the circuit board.

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Cooper Tools GmbH, Carl - Benz - Str. 2, 74354 Besigheim, P.O. Box 1351
Germany, Tel: [phone] - 0, Fax: [phone]
2 Safety instructions
Correct usage
The camera positioning system WQB OPS is designed for placing components on circuit boards in
conjuncti on with the WQB 3000.
Improper usage
The manufacturer accepts no liability for usage other than that described in the operating instructions, or
unauthorised modifications.
These operating instructions and the descriptions contained herein are to be car efully read; the operating
instructions are to be stored such that they are clearly visible near the system. In addition, the general
warnings from the PC manufacturer and for the WQB 3000 apply. Failure to observe the instructions can
result in accidents and injury, or damage to the health.
In accordance with the EU declaration of conformity, the WELLER WQB OPS positioning system
meets the basic safety requirements of the directives 89/336/EWG und 73/23/EWG.
3 System requirements
For the usage of the po sitioning system, a commercial standard PC with the following features is required:
Intel Pentium with at least 1 GHz clock frequency, CD - ROM drive
Min. 128 MB RAM
Operating system: WIN 2000 with SP 4 or higher, WIN XP with SP1 or higher
OHCI compliant Fi reWire interface
Graphic card: recommended resolution 1280x1024, min. 16 bit colour
4 Commissioning
On initial commissioning of the camera system, it is imperative that you proceed in accordance with the
following instructions. The complete installation of the positioning system is described in detail, set - by - step,
in chronological order.
4.1 Items supplied
The complete positioning system comprises the following components:
FireWire digital camera
Camera connecting cable
Software on the installation CD
Positioning unit with precision drives
Vacuum pick up with 2 changeable vacuum inserts and hex socket wrench 1.5 AF
Telecentrical high resolution objective lens
Calibration tool
RS - 232 interface cable for the operation of the WQB 3000 OPS with the PC
O perating instructions

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4.2 Commissioning of a FireWire interface card (optional)
If your PC is not yet equipped with a FireWire interface, you have to install a commercial standard IEEE
1394a FireWire PCI interface card. The installation of the FireWire interface card only requires a spare PCI
slot. The interface card is to be fitted in the slot with the PC switched off.
A laptop without FireWire port can be retrofit with a PCMCI FireWire adapter card, but an external power
supply for the camera is requi red. The suitable camera split cable and the appropriate power supply must be
ordered separately as an accessory (see chapter 8).
Procedure:
Switch off the PC and all equipment connected to it
Unplug all cables from the PC
Discharge yourself before you touch the PCI interface card, e.g., on the metal housing of the PC
Open the PC housing in accordance with the manufacturer's instructions
Choose a suitable PCI expansion slot
Unscrew the cover plate for the slot
Insert the FireWire interface card in an emp ty PCI slot in the PC
Press the adapter gently but firmly into the slot and check to see that all contacts are fully seated in the
connector
Attach the bracket screws that secure the card to the chassis
Close the PC housing in accordance with the manufactu rer's instructions
Re - fasten all cables to the PC
Switch on the PC and all equipment connected to it
When re - booting the PC, a new multimedia controller is automatically detected by the Device Manager. The
installation of the related driver is described i n more detail in section 4.4.
4.3 Commissioning the camera
Connect the camera on the positioning unit to the PCI interface card using the special cable supplied.
Ensure that the connections are made properly. Via the cable the camera is supplied with po wer (12 V), the
image data is transferred, and the camera is controlled.
In principle it is also allowed to connect and disconnect the camera with the system running. It is not
necessary to re - initialise the camera.

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Cooper Tools GmbH, Carl - Benz - Str. 2, 74354 Besigheim, P.O. Box 1351
Germany, Tel: [phone] - 0, Fax: [phone]
4.4 Installation of the "Weller OPS" image processing software
The complete installation of all software components for the " Weller Optical Placement System " image
processing software included on the CD - ROM supplied is performed in three stages:
Installation of the driver for the FireWire interface card
Installation of the image processing software
4.4.1 Installation of the driver for the FireWire interface card
Insert installation CD in the drive on the PC
Open Hardware wizard on the PC:
START MY COMPUTER PROPERTIES HARDWARE D EVICE MANAGER
When you follow the instructions from the Hardware wizard, a search is performed for the appropriate driver
for the FireWire interface card. This is on the installation CD in the following folder:
: \ WELLER_OPS \ boifcW98W2k
Once th e installation has been completed, the following entry appears in the Device Manager. The driver for
the FireWire interface Baumer 1394 Device 1 has been activated.
:\ WELLER WQB OPS \ FireWire Interface Driver

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4.4.2 Installation of the image processing software
The SETUP program for the in stallation of the image processing software is also on the CD - ROM, in this
case in the folder:
Start the SETUP program and follow the instructions on the screen. Following completion of the installation
an icon for the positioning software user i nterface is added to the desktop on the PC.
4.5 Problems during the installation
If you had to install a FireWire interface card in your PC, the card is a "Plug and Play" card, i.e. the image
processing software can be started following the installation of the hardware and software components.
Due to the large variety of available mother boards, BIOS chip sets and graphics cards, it can, however, not
be excluded that in isolated cases problems may occur during or after the installation. Proceed as follow s:
Has the interface card been fitted to the PC in accordance with the instructions?
Is the camera connected?
Is the camera connecting cabled inserted?
Has the image processing software been installed without problems?
If necessary, you can order a refer ence list using the service telephone number from chapter 7.3.2, which
contains hardware components tested with our camera system.
5 Using the "Weller OPS" software
5.1 Introduction
The "Weller OPS" software is a user interface that was developed espec ially for the WQB OPS camera
positioning system for positioning surface mounted components.
Emphasis was placed on large, easy to use buttons and a clear structure so as to minimise the time required
for familiarisation with the software. In the following a description of the user interface is given, as well as a
description of all functions.
This software was developed for the FireWire camera series FWX and also for the older CX camera series in
conjunction with the PCI - 4129 interface card, and only work s with this configuration.
:\ WELLER WQB OPS \ OPS Setup

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5.2 Layout of the user interface
The screen for the "Weller OPS" user interface is laid out as shown in Fig. 1:
Fig. 1: General overview, Weller OPS
Menu bar
Here you will find all the general functions for using the program. The individual commands are described in
section 5.4.1.
Toolbar
Here you will find buttons for using the program. This toolbar can be toggled on and off. The individual
commands are described in section 5.4.2.
Image area
Display of the curr ent (live or snapshot) image, adjusted to the image window and at the zoom set.
Dialog bar
You can access all functions for controlling the camera using the dialog bar.
Tool bar
Dialog bar
Image area
Menu bar

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Cooper Tools GmbH, Carl - Benz - Str. 2, 74354 Besigheim, P.O. Box 1351
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5.3 Commissioning the digital camera (only CX camera series)
A connected FireWire ca mera is automatically detected and initialised by the software. The following choice
is only valid for a connected camera of the CX series.
The first time the program is started, there is no
camera set up for image acquisition. Using the
Special command, you can choose the camera
type in the Settings dialog box. To open (initialise)
the camera, you must make mark it (with a blue
background) on the list and click the "OK" button.
The selected camera is then always opened each
time the program is started.
Following camera types are supported:
CX05c Colour Digital camera with standard resolution
CX13c Colour Digital camera with high resolution
For information on the installation of the camera, see section 4.4.
5.4 Description of the menu bar and the tool bar
5.4.1 Menu bar
Component Library
New
Opens the New Component dialog box in which you can configure a new component.
Package dimensions
Pitch
Number of soldered connections in x and y
Ball diameter
Pad dimensions on the circuit board
Rotation of the component
Line width of the frame in pixels
Component name
"Save saves the values for a new
component
"
Cancel interrupts the function
" OK" accepts the settings and
opens
the component.

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Open
Opens a dialog box in which you can select already defined components.
Choose the component and mark it. Once the compon ent has a blue background, you can accept the
selection using the "OK" button.
Delete
Deletes the component with a blue background
Edit
Opens the "Edit Component" dialog box in which you can change the entries for the selected
component.
Cancel
Clo ses the dialog box without accepting the component selection.
OK
Accepts the selected component
Packag
e dimensions
Pitch
Number of soldered connections in x and y
Ball diameter
Pad dimensions on the circuit board
Rotation of the component
Line width of the frame in pixels
Shows the component selected
"Cancel interrupts the function
"OK accepts the changes

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View
Show Toolbar
Using this function the toolbar can be toggled on and off.
Snap
A single image (single image acquisition) is taken and displayed.
Live
Continuous acquisition and display of the incoming image data. The image data is transmitted in real
time to the memory in the PC via DMA. The image calculation and display frequency depend on the
PC resources.
Zoom
Switches to a magnifying glass in the image area. If the left mouse button is pressed, the area around
the magnifying glass is enlarged. If the mouse button is clicked again, the area is enlarged again.
Using the right mouse button the zoom can be undone step - by - step. When the function is deactivated
with the Zoom button, the full image is displayed again. The Zoom factor, which adjusts the degree
step between each Zoom step, is being regulated in the menu Special Settings .
Special
Camera Adjustment
The mechanical adjustment of the pos itioning unit (centre of the camera) to the centre of the soldering
head on the WQB 3000 is performed in the factory. The Camera Adjustment function provides an
additional digital adjustment that can be performed when required. This function must be used w hen
the positioning system is commissioned for the first time. Proceed as follows:
Insert calibration plate in the WQB 3000 circuit board holder
Lock soldering head in the centre of the unit and align the cross - wires on the calibration plate with
the cent re of the soldering head using the circuit board holder precision drives
Unlock soldering head and move the positioning unit to the centre of the unit
To determine the conversion factors from image pixels to millimetres, the Calibration routine must
be run (see section 5.5).
On the activation of the Camera Adjustment function, a blue cross marks the original centre of
the image. The red cross is positioned exactly on the cross - wires in the camera image using the
mouse and accepted by clicking the left mouse button. The positioning frames are now drawn
around this new image centre.
Digital adjustment is only possible in a range of 2 mm from the centre of the image. In case of larger
deviations, mechanical adjustment is required. On this topic, see section 7.1.
The function is only available in the "Live" mode and is password protected. The password is fixed and
is WELLER.
Settings
Opens a dialog box in which you can choose the camera type and that also provides information on all
destination folders. Th e scale is also displayed after a calibration has been performed. The degree
step during zooming can be adjusted with the Zoom Factor . The colours for the frames F1 and F2
can be set in accordance with the Windows default. All settings are applied using "O K".

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Exit
Quits the program. All values set are saved and loaded again the next time the program is started.
Help
Here the " About " dialog box is displayed .
5.4.2 Toolbar
Open Image File
Opens a saved image, at the same t ime the program is switched to the Snap Shot mode .
Save
Enables image files to be saved. Visible frames are also saved. When the "Save" button is
clicked the destination folder is displayed and the name of the file can be entered. When "Save"
is clicked a text file is opened to which user data can be written. The text file is saved in the
destination folder set (see Settings ) under the same image name. The image formats BMP and JPG
(default) are available (see also Save in the dialog bar). When images ar e saved in the JPG format, a
dialog box appears in which the image compression can be defined: "low" highest possible
compression, "best" lowest possible compression.
Open Component Library
Opens a component library from which the required component ent ry can be selected. See
also section 5.4.1 under Component Library "Open".
Select the camera type
Path information on where the
related files are saved. By default the
installation directory is entered.
Pixel to millimetre ratio after the
cal
ibration
Colour selection for the frames F1, F2
Factor of the Zoom function

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Print
Prints the image currently displayed in the image area.
Live
Continuous acquisition and display of the incoming image data. The image data is transmitted
in real time t o the memory in the PC via DMA. The image calculation and display frequency
depend on the PC resources.
Snap Shot
A single image (single image acquisition) is taken and displayed. A new image is displayed
when the button is clicked again.
Zoom
Switch es to a magnifying glass in the image area. If the left mouse button is pressed, the area
around the magnifying glass is enlarged. If the mouse button is clicked again, the area is
enlarged again. Using the right mouse button the zoom can be undone step - by - step. When the
function is deactivated, the full image is displayed again.
Frame F1
Draws the frame F1. This is centrally positioned around the positioning cross. If a calibration
has not been performed following installation, this button is not availa ble. The size of the frame
depends on the data for the component selected.
Frame F2
Draws the frame F2. This is centrally positioned around the positioning cross. If a calibration
has not been performed following installation, this button is not availab le. The size of the frame
depends on the data for the component selected.
The F1 and F2 buttons only become available when a calibration has been performed following
installation. The calibration affects the matching of the frame to the component represe nted and must
therefore be performed very accurately.
5.5 Description of the dialog bar
Shutter Mode
Using this function the exposure time for the camera can be
increased or decreased manually. Usage of this function disables
the Autoshutter .
The ex posure time is changed by pressing the plus or minus button.
The step sizes are preset depending on the camera type. The
current exposure type is displayed between the plus and minus buttons, with the addition of "Manual".

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Autoshutter
The camera automa tically adjusts the exposure time such that an adequate image is
displayed. On the usage of the manual shutter mode this function is automatically disabled.
The exposure time set is displayed between the plus and minus button for the Shutter
Mode function, with the text " Auto" (see description of the Shutter Mode function).
Zoom
Switches to a magnifying glass in the image area. If the left mouse button is pressed, the area around
the magnifying glass is enlarged. If the mouse button is clicked again, the area is enlarged
again. Using the right mouse button the zoom can be undone step - by - step. When the
function is deactivated, the full image is displayed again
Save
Enables image files to be saved for documentation purposes. Visible frames are also
sav ed. When the "Save" button is clicked the destination folder is displayed and the name
of the file can be entered. When "Save" is clicked a text file is opened to which user data
can be written. The text file is saved in the destination folder set (see Set tings ) under the
same image name. The following formats are available:
BMP format
JPG format (default)
When a file is saved a dialog box appears in which
you can define the compression applied to the image:
" low " highest possible compression, " best " low est
possible compression.
Gamma
The gamma value of an image is a measure of its contrast and
brightness. By correcting the gamma value you can straightforwardly
adjust both these variables simultaneously. The default value set is
1.0. You can adjust the value by moving the slider or clicking the
arrow keys. For correct analysis of the image data, a gamma of 1.0
should always be chosen.
If gamma is greater than 1.0 or less than 1.0, some of the system resources are used for performing
this function, this will reduce the image rate.
Gain
You can regulate the gain of the camera signal using the slider. The
value set is displayed. The higher the gain, the greater the noise in
the image (interference at individual pixels) and the poorer the
quality of th e image.
It can be necessary to increase the gain if there is insufficient light
for the display of an adequate image (e.g. if the exposure time cannot be further increased, is
undesirable due to the lower image rate, or if the smallest aperture is already set on the camera).

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Options
Draws the frame F1. This is centrally positioned around the positioning cross. If a
calibration has not been performed following installation, this button is not available. The
size of the frame depends on the data for the c omponent selected.
Draws the frame F2. This is centrally positioned around the positioning cross. If a
calibration has not been performed following installation, this button is not available. The
size of the frame depends on the data for the component s elected.
The F1 and F2 buttons only become available when a calibration has been performed following
installation. The calibration affects the matching of the frame to the component represented and must
therefore be performed very accurately.
Opens a dialog box in which the calibration is described. When you click the "OK" button, a
cross becomes visible in the image field. This cross must be positioned on the first scale
point required and the cross set by clicking the left mouse button. Keep the mous e button
pressed and drag to the second scale point. When the cross is in exactly the correct
position, release the mouse button. A dialog box now appears in which the length information in mm
for the area measured is entered. This process must be performe d a second time for confirmation; the
calibration is completed with "Finish" . The average value for the two measurements gives the
conversion factor for pixels into millimetres.
Attention: You must work with vary precisely during calibration, as this function affects the generation
of the positioning frames. For this purpose use the length scale on the calibration plate supplied.
White Balance
Due to the type of image sensor used in the camera, the original image data has a green
cast. For this reaso n a white balance should be performed. During this process the colour
channels RGB (red, green, and blue) are adjusted automatically. This function is enabled
by clicking the White Balance button.
A white surface is ideal for adjusting the colour channels. This function is only available for colour
cameras.

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Colour
This function opens a dialog box in which optimised image representation can be activated
and the RGB colour values (red, green, and blue) can be changed individually by the user.
These func tions are only available for colour cameras, to change the RGB colour values, Enable must
be selected.
If the "Use color transformation" function is selected, some of the system resources will be used for
performing this function, this will reduce the image rate.
Optimised display of colours
RGB colour values

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6 Positioning components with the WQB 3000 OPS
6.1 Initialising the positioning unit
After desoldering a faulty component, the soldering head is unlocked by pushing the button on the left of the
base frame and moved to the left idle position. The positioning unit is now carefully moved to the working
position (centre of the unit) at moderate speed and automatically locked.
6.1.1 Selecting the camera objective
The positioning system is delivered factory side with a telecen trical high resolution objective lens (3), type 2.
Nearly all common SMT components can be placed with it reliable.
Object area in mm
FWX05c FWX08c FWX14c
Objective Primary
Magnification
CX05c - CX13c
1 0,12 53 x 40 44 x 33 -
2 0,14 45 x 34 34 x 2 5 63 x 47
3 0,26 24 x 18 18 x 13 34 x 25
The objective (3) together with the camera (1) is bolt to the base unit with the clamping ring (14).
6.1.2 Selecting the vacuum insert
2 different vacuum inserts are available for universal placement of compo nents of varying size. The vacuum
pick up (10) is fitted to the rotating ring (7) on the positioning unit (4) such that it is flush with the flange
surface and locked using the clamping screw in the rotating ring. For this purpose use the hexagonal socket
wrench 1.5 mm AF supplied. The desired vacuum insert (11) is screwed onto the lower end of the vacuum
tube until block.
Vacuum
insert
Diameter
in mm
Recommended component dimensions
in mm
1 12 42 to 20
2 7 20 to 8
The vacuum inserts of type 1 and ty pe 2 have an O - ring that provides optimal suction of the
components. When using this type ensure that the O - ring is perfectly flat in the shoulder on the
vacuum mount.
For the positioning of very small sized components, the vacuum pick up can be used dir ectly without
insert.

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6.1.3 Adjusting the automatic set down of the component
The automatic set down of the component onto the circuit board simplifies the positioning and prevents
undesired movement of the component. The depth stop must be once precisely adju sted to the height of the
component to be positioned for the correct usage of this function. Proceed as follows:
Put a sample component onto the placement area
Lower down the positioning unit onto the device of the depth stop (12) using the operating leve r (2)
With the means of the adjustment spindle (14) the depth stop is adjusted, so that the vacuum pick up
touches the component without any force. With a counter clockwise rotation of the spindle, the depth
stop will be corrected downwards
By pressing the right button in the base frame of the WQB 3000, the vacuum at the vacuum pick up is
activated and the positioning unit is raised up pneumatically. The component can now be adjusted freely
floating over the circuit board (for more information see section 6 .5)
Another key press on the right button lowers the component back to the circuit board and time delayed
the vacuum is switched off. After another time delay the positioning unit is lifted up and the component
remains on the circuit board
With the aid of the operating lever (2), the positioning unit is lifted up to the upper idle position
6.2 Calibrating the camera system
After changing the objective the camera system must be re - calibrated in relation to the generation of the
positioning frames. During t he calibration a conversion factor from image dots in the camera (pixels) to a
measure of length (mm) is calculated. The calibration process is explained in more detail in the description of
the software in section 5.5.
6.3 Selecting components from the l ibrary
The type of component to be positioned is selected from the Component Library . If the component is not
yet saved in the library, the related parameters are saved in a new entry in the component library. For more
information see section 5.4.
6.4 Po sitioning the circuit board
The circuit board on which the components are to be positioned is placed in the WQB 3000 circuit board
holder and approximately aligned with the centre of the positioning unit, and then clamped. By clicking the
Frame F2 button the positioning frame F2 is shown on the live image from the camera. With the aid of the
precision drives for the circuit board holder, the pad layout on the circuit board is now positioned exactly
within this frame in the x and y direction.
With the a id of the zoom function, the accuracy of the positioning within the frame can be checked
and, if necessary, adjusted.
6.5 Positioning the component
By pressing the right button in the base frame of the WQB 3000, the vacuum will be activated. The
compone nt to be positioned is picked up from the tray or other container approximately in the middle of the
vacuum mount on the positioning unit (11). Lower the positioning unit to the depth stop (12) using the
operating lever (2).
By clicking the Frame F1 button the positioning frame F1 is shown on the live image from the camera. With
the aid of the precision drives on the positioning unit, the edges of the component are exactly aligned with
the frame in the x and y direction (5) (6) and for theta rotation (8).

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For SMT components with a large number of pins with soldering connections around the outside such
as QFP, PLCC, etc., the component can be placed directly by means of lead - to - pad alignment.
The positioning unit is lowered onto the circuit board by pressing again the right button in the base frame.
After a time delay the vacuum will be switched off and the positioning unit is lifted upwards. The component
is now exactly placed on the circuit board.
With the aid of the operating lever (2), the placement head is raised, unlocked and moved away from the
working position. The component can now be soldered in place using the soldering head on the WQB 3000.
Positioning the circuit board:
The pad layout is exactly within the
red positioning frame F2
Positioning the component:
The component is within the yellow
positioning frame F1.
Component and circuit board are now
positioned accurately with respect to
each other.

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7 Troubleshooting and maintenance
7.1 Mechanical adjustment o f the camera
If it was not possible to digitally adjust the camera to the centre of the soldering head, the position of the
camera must be mechanically re - adjusted. Proceed as follows:
Loose carefully the 2 cylinder head screws M3 that join the clamping ring (14) with the cantilever arm of
the base unit
Start the "Weller OPS" image processing software and choose the Camera Adjustment command as
described in section 5.4.1
The blue cross in the live image must be brought as close as possible to the cross - wi res on the
calibration tool by rotating and moving the complete clamping ring. Afterwards tighten again the clamping
ring with the cantilever arm
Finish the Camera Adjustment command
Rotate the objective with camera within the clamping ring, if the corners of any displayed positioning
frame didn t lay exactly on the diagonals of the calibration tool
Repeat the Camera Adjustment command once more
The adjustment must be made with great care by a suitable trained specialist.
7.2 Checking the stroke of the positioning unit
After the camera is adjusted mechanically, the stroke of the positioning unit must also be checked. This has
already been performed in the factory and only needs to be repeated in case of re - adjustment.
Fit vacuum insert type 2 into the vacuum pick up of the positioning unit
Select "CALIB" component from the component library and show frames F1 .
Operate precision drives in x and y direction to the end stop in both directions by rotating the knobs (5)
and (6). The vacuum inserts should alw ays be in the related end position within the frame F1 .
If the adjustment ranges of the vacuum pick ups vary excessively from the middle position, the rotating
ring on the positioning unit can be re - adjusted using the 2 cylinder screws M4 x 12 (7) such th at the
vacuum insert is as far as possible in the middle. Minor variations from the centre of the positioning can
be tolerated.