Erhardt+Leimer OL 80 Installation And Operation Instructions Manual Download Page 22

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B Page 22

BEA--220265-EN-04

CCD array camera OptoLine OL 80..

7.8.2 Template calibration

Template calibration is designed for camera implementation in lami-

nation processes. With template calibration, the resolution of two

cameras (as with standard calibration) and the distance of the cam-

eras to one another may be simultaneously calibrated.
Calibration template, E+L mat. no. 226896 consists of a metal strip

with two slots. For calibration purposes the center of the template

must be aligned according to a freely selected reference point, e.g.

the machine center. One slot each must be located in the measuring

range of each camera.

➜

Align template.

➜

Call up the setup editor.

➜

Calibrate the first camera as follows:

➜

Enter the camera device number in parameter 0.

➜

Enter the camera group number in parameter 1.

➜

Check parameter 17. To assure that the camera may be correctly

calibrated, it is important that the right lens focal distance is set:

1 = 24 mm (OL 8024)

2 = 28 mm (OL 8028)

3 = 50 mm (OL 8050)

➜

Enter the length of the calibrating template slot in parameter 18.

➜

Enter the distance of the slot (inner edge) to the reference point,

e.g. machine center in parameter 19.

➜

Calibration: enter a 7 in parameter 3 for this purpose, then change

parameter to initiate the calibration routine. During calibration, the

two halves of the LED bar on the CCD camera flash alternately

(approx. 5 secs). During calibration, the two red LEDs on the sen-

sor key of E+L command device DO 10.. light up.

- If calibration is not successful, every second LED on the camera

LED bar flashes. In addition, an error message is displayed in pa-

rameter 5.

- If calibration is successful, a reset is initiated automatically. Then

the LED bar on the array camera indicates the position of the web

in the measuring range. The two red LEDs on the sensor key of

E+L command device DO 10.. go out.

During calibration, the distance of the camera to the reference

point is calculated and stored in parameters 23 and 24 as the

"mount position".

➜

Calibrate the second camera as the first.

➜

Wait approx. 1 minute after calibration until setup mode is quit au-

tomatically. The cameras are now ready for operation.

Length

Distance

reference

point

Template calibration with E+L template

(mat.no. 226896)

Summary of Contents for OL 80

Page 1: ... Determining the background 10 5 7 Mount support roller 10 6 Installation 11 7 Commissioning 11 7 1 Position camera 12 7 2 Check wiring Check wiring 12 7 3 Check supply voltage 12 7 4 Set camera CAN address 12 7 5 Position the web edge in the camera visual range 13 7 6 Set the camera aperture and focusing 13 7 7 Camera configuration 16 7 8 Camera calibration 20 7 9 Width measuring function calibra...

Page 2: ... be read carefully prior to assembly operation and maintenance work jobs to be performed important information and instructions The CCD array camera Opto Line OL 80 should only be operated by qualified personnel or suitably instructed persons CCD array cameras in the OL 80 series are only differentiated by their various lenses measuring ranges The function of the cameras is identical The first two...

Page 3: ...cations or operating instructions A width measuring system consists of one or several cameras a set of cables one or two light transmitters a DO 002 remote display A web guiding system consists of one or several cameras a set of cables one or two light transmitters an E L controller with command station 3 3 Operating principle Frontlighting Backlighting Scanning methodes Two different scanning met...

Page 4: ...trast changes in its measuring range regardless of whether these are caused by one or several webs See fig on page 5 A maximum of 8 measuring values can be output on the basis of the positions recorded A measuring value is a contrast position e g the web edge position or the center between two contrasts e g the web or line center position The built in light controller makes the camera practically ...

Page 5: ...CCD array camera OptoLine OL 80 Frontlighting principle Pixel 1 CCD camera Scan on oscilloscope Edge Printed line dark Light transmitter Web light CCD camera visual range 1 Edge 2 3 Line 1 Background 2 3 2048 Scanning direction ...

Page 6: ...ss section The DEV key is also used to set which measured value is to be in dicated on the LED display Press and hold down the DEV key The address of the measured value currently being displayed is indicated The addresses of all configured measured values are displayed in sequence at 5 second intervals Release the key once the address of the required measured value appears Other settings by the E ...

Page 7: ...can lines or transparent webs edges on opaque webs should be scanned using backlighting In border cases the suitable scanning process should be selected by trial and error The distance K between the camera and web influences the camera measuring range the shorter the distance the smaller the measuring range the smaller the measuring range the more precise the measure ment resolution The following ...

Page 8: ...pivoting frame the stroke must be taken into account with regard to web movement 5 3 Determining the light transmitter size and dis tance M between the light transmitter and camera CCD camera not usable 100 mm Operational range Web Light transmitter CCD camera visual range Distances camera Light transmitter Web Distance K between the camera and web is determined by the mea suring range Distance L ...

Page 9: ...mmend you pin the supports once the camera has been positioned 7 1 commissioning How the light transmitter is mounted depends on the scanning pro cess implemented M Max mounting dist camera light transmitter M in mms a Light transmitter operational range in mms b CCD element length 28 67 mm f Lens focal length 24 28 or 50 mm Vertical web travel Horizontal web travel 5 4 Camera assembly 5 5 Light t...

Page 10: ...nsmitter is not in the camera visual range A uniform contrast free dark background is required for frontlighting You may have to mount a matt black panel behind the web in the camera visual range This optimum contrast to the web guarantees efficient web edge scanning influences from external light sources are avoided It must be guaranteed that the web does not form folds or creases and that the ed...

Page 11: ...d this a terminating resistor connector is attached to both ends of the CAN bus line 3 pole plugs are used as CAN bus connec tors when using your own light transmitters that they feature an electronic ballast min 5 kHz Procedur 7 1 Position camera 7 2 Check wiring 7 3 Check supply voltage 7 4 Set check camera CAN address 7 5 Position web edge in the camera visual range 7 6 Set camera aperture and ...

Page 12: ...t The CAN address is specified on the type plate along with the module reference and is listed in the system block diagram If cameras are supplied individually as a component of systems not designed by E L you must set the CAN address To do so see the CAN bus serial bus and setup editor description In this case cam eras are supplied with CAN address 0 1 The camera device numbers are fixed see tabl...

Page 13: ...against twisting by an O ring the latter should be moved to the side during setting procedure 7 6 1 Setting the aperture Turn the ring for setting the aperture to the left stop Turn the ring in approx 5 sec intervals slowly from left to right Watch the LED display on the camera operating controls while do ing so If the camera is inadequately exposed every second LED flashes If the camera is over e...

Page 14: ...n the camera Press the GRP key on the camera control field until LED 0 and 1 above the GRP key light up alternately approx 10 seconds These two LED s indicate that the set focusing mode is activated Additionally further LEDs may also light up Turn the ring or lens to set the focusing depth until as many LEDs as possible light up The LEDs indicate the focusing depth set Terminate set focusing mode ...

Page 15: ...y defined edge Camera visual range 2 25 ms Camera visual range 2 25 ms Oscilloscope focusing the camera 7 6 2 4 Retaining settings Turn the ring or lens for setting the focusing depth until the as cending or descending flank is depicted by as few pixels as pos sible see illustration below Retain the settings with an O ring or enclosed adhesive plate mat no 231411 Adhesive plate ...

Page 16: ...alue 4 CAN address 1 2 Width measuring left sensor Mode 2 in parameter 6 Constrasting edge 2 in parameter 7 Constrasting edge 3 in parameter 8 CAN address 0 1 Direction of web travel Example camera configuration Example A camera is used on an E L web guider with pivoting frame The web is to be guided by the right web edge left web edge and web center In addition the distance between two lines prin...

Page 17: ...or should output the position of a contrasting edge operating mode 1 or the center between two contrasting edges operating mode 2 Once the operating mode is set the contrasting edges in the camera scanning range from which the position is to be output must be specified parameter 7 8 Emergency guiding parameter 9 is intended for web guiding or fol low up systems For each sensor that outputs a measu...

Page 18: ...lue 1 Enter the contrasting edge number the position of which is to be output in parameter 7 The preceding sign indicates the direction of counting see fig opposite The following applies for cameras mounted in the direction of right web travel No pre sign direction of counting from outside to inside Negative pre sign direction of counting from inside to outside The following applies for cameras mo...

Page 19: ...m eter 6 1 contrasting edge 2 center between two contrasting edges 1 for measured value 2 Enter the contrasting edge number by which measuring or guiding is to be performed in parameter 7 The preceding sign indicates the direction of counting The following applies for cameras mounted in the direction of right web travel No pre sign direction of counting from outside to inside Negative pre sign dir...

Page 20: ...variable for control or measuring system signals all sensors and actuators must be calibrated in rela tion to this uniform reference variable There are two different calibration procedures for the camera standard calibration and template calibration The latter is intend ed for cameras implemented in lamination processes 7 8 1 Standard calibration For camera calibration a template is required that ...

Page 21: ... automatically Then the LED bar on the array camera indicates the position of the web in the measuring range The two red LEDs on the sensor key of E L command device DO 10 go out Check parameter 5 additionally If calibration is not successful error code 4 or 5 clear the er ror and repeat calibration If calibration is successful error code 3 calibration ok select parameter 22 Parameter 22 indicates...

Page 22: ...alibrating template slot in parameter 18 Enter the distance of the slot inner edge to the reference point e g machine center in parameter 19 Calibration enter a 7 in parameter 3 for this purpose then change parameter to initiate the calibration routine During calibration the two halves of the LED bar on the CCD camera flash alternately approx 5 secs During calibration the two red LEDs on the sen s...

Page 23: ...in millimeters Deduct the value from the width indicated on remote display DO 002 Example width displayed 150 measured template width 100 offset 50 Enter the offset in parameter 9 e g 50 Value 1 for the web width must be set in parameter 10 If this is not the case enter 1 Enter a 1 reset in parameter 3 then change parameters to initi ate a reset The width measuring function is now ready for operat...

Page 24: ...tinually readjusted 2 exposure control off The exposure is fixed at a value set in pa rameter 29 This setting may be advantageous when scanning edges with a poor contrast 7 10 3 Setting the type of contrasting edge evaluation On some applications it may be beneficial to change the evaluation of the contrasting edges This change should only be made when no satisfactory results could be achieved wit...

Page 25: ...valid negative flank must not drop Grey scale threshold that must be exceeded by a valid positive flank Example contrasting edge evaluation Flank height Grey scale threshold Parameter 34 lower limit value Parameter 32 0 minimum height of a valid negative flank Parameter 32 1 grey scale threshold below which a valid negative flank must not drop ...

Page 26: ...es from the set position the guider corrects the position of the web 8 1 1 Specify set position value on command device DO 1 Example 1 see illustration above The web is to be guided by the center For this purpose the set posi tions of measured value 1 and 2 must be stored On this basis the guider calculates the set position of the web center Before guiding position the web in the measuring range s...

Page 27: ...sured value set position may also be specified via the setup editor Before guiding position the web in the camera measuring range so that the measured value is located at the set point See exam ple 8 1 1 Call up the setup editor Enter a 4 define guiding criterion in parameter 3 of the camera then change parameter The measured value set position is now stored in parameter 13 The stored set position...

Page 28: ...ion from outside to inside to web center negative pre sign opposite scanning direction from inside to outside 8 edge 2 0 30 30 R W Contrasting edge 2 only for camera mode 2 Number of contrast edge in scan from which the position is to be output The pre sign indicates the scanning direction see parameter 7 9 emergency guidance 00 00 7F R W Web guider emergency guiding 0 no job Uneven 0 address of s...

Page 29: ...e threshold The limit values are set in parameters 33 and 34 3 3 top threshold value 30 255 255 R W Upper threshold value for edge evaluation DieThe function of parameter 33 depends on the edge evaluation set in parameter 32 Parameter 32 0 minimum height of a valid positive flank pos value Parameter 32 1 grey scale threshold that must be exceeded by a valid edge pos value 3 4 down threshold value ...

Page 30: ...amera calibration section Error message examples 30 Standard calibration ok optimum exposure Calibration was successful and can be terminated 20 calibrated no result optimum exposure The position of the measured value cannot be established despite optimum exposure no contrasting edges available e g a printed line 122 not calibrated no result camera is under exposed The camera was not calibrated or...

Page 31: ... the length of the fluorescent tubes Lens 1 2 8 24 mm 1 2 8 28 mm 1 1 8 50 mm Lens connection M 42 x 1 bayonet Measuring range depends on lens and distance to lens Resolution measuring range 8192 Scanning rate max 700 Hz Pixel frequency 1 33 MHz Pixel count 2048 Pixel size 14 x 14 µm Active chip length 2048 x 14 µm 28 67 mm Spectral maximum 500 nm Exposure controller 20 to 700 Hz Operating frequen...

Page 32: ...GND CAN EXTRIG EXTRIG CAN CAN GND CAN Video OUT Video GND Mains L L 24 VDC 0 3 A L L PE Back up fuse max 6 A On site shutdown via main machine switch 3 x 1 5 mm2 See block diagram for wiring See block diagram for wiring X 11 X 5 X 4 X 2 Power card CN 0201 Camera evaluator card CL 0201 CCD chip control CP 0201 OL 80 Wiring diagram Technical data subject to modification without notice ...

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