Product

• Kodak^® Magnus^™ 400
• Kodak Magnus 400E

Error

One or more of the following messages might appear when smart edge detection fails:

• ID = 8008 Edge detection is not accurate. Possible dirt on drum.
• ID = 4010 The task Perform Plate Edge Detection failed.
• ID = 4010 The task SED: Plate Edge Detection Calibration Task failed.

Symptoms

Smart edge detection failure.

Cause

The edge detection system repeatedly performs edge detection to locate the plate edge and returns inconsistent position readings.

The edge detection system performs edge detection several times and finally locates the plate edge.

The edge detection system performs edge detection and cannot locate the plate edge.

When the plate unloads from the platesetter and there is no image on the plate, an error message appears.

Possibilities for the failure include:

• Dirt on the lens, drum, light detector, or edge detection strip
• The plate is not properly attached to the drum
• Faulty focus motor functionality
• Laser power failure
• Power supply failure
• Drum encoder performance failure
• Faulty smart edge detection board
• Faulty LDA head

Solution

Note: After each adjustment or part replacement, check whether the problem is resolved. If not, proceed to the next step.

1. Expose a plate and visually verify that the following parameters are properly adjusted. To adjust one or both of the parameters, see Height/Width Start Image Area Adjustment.
   • Wide Start Image Area
   • Height Start Image Area
2. Run diagnostics to verify that the power supplies have the correct tolerance and confirm that the tolerance diagnostics tests were successfully passed.

If any of the power supplies fail, replace the entire power supply tray (part number 500-00511A).

2. Check the reliabiltiy and accuracy of the Smart Edge Detection test.
   1. Load a plate to the drum, perform edge detection, and verify that the edge detection location is consistent.
   2. If you cannot perform edge detection, clean the following parts:
      • Optic lens n the laser diode array (LDA) head
      • Drum vacuum holes
        Note: Clean the drum vacuum holes while the vacuum is on.
      • Light detector
      • Edge detection strip
        Note: Clean the edged detection strip with alcohol.
      • V block
3. Verify that the plate is attached securely to the drum.
   1. Verify that the the vacuum pump is turned on.
   2. If hot spots or bubbles appear on the leading edge of the plate, perform the steps in the following procedures to resolve these problems:
      • Moving the focus motor to solve hot spots
      • Troubleshooting hot spots
4. In the registry, locate HKEY_LOCAL_MACHINE\SOFTWARE\Kodak\Projects
   \Magnus400\EXPOSE and verify the values for the following parameters:
   • Focus Relative Move For Edge Detection(micron) is
     –100 for 0.15 and 0.2 mm plates.
   • Plate Edge Wide Range Detection Enable is 1
5. If you have a 42-diode platesetter, check the functionality of beam 0. This beam determines proper edge detection. If required, in the registry, locate HKEY_LOCAL_MACHINE\SOFTWARE\Kodak\Projects
   \Magnus400\IO OBJECTS\LASER GROUP\Laser Group and change the value of the Plate Edge Detection Laser 0-first,
   1-last parameter from 0 (beam 0) to 1 (beam 41).
6. Verify that the adapter cable (part number 220-01106B) that connects between the Smart Edge Detection board and the LMCE board is in good working condition. If the cable is damaged, replace it.
7. From the Operations toolbar, select Settings > Media Definitions.
8. In the Media Definition dialog box under Media Parameters, verify that the Thickness value is defined correctly, or change as required.
9. If the size of the plate is close to the maximum plate size, in the registry, locate HKEY_LOCAL_MACHINE\SOFTWARE\Kodak\Projects
   \Magnus400\IO OBJECTS\MACHINE and verify that the value of the Height Start Image Area (mm) parameter is 35. If required, reduce the value of the Height Start Image Area (mm) parameter by
   3 to 5 mm.
10. In the registry, locate HKEY_LOCAL_MACHINE\SOFTWARE\Kodak\Projects
    \Magnus400\MACHINE and change the default value of the Plate on Drum Height Axis Absolute Position Error (mm) parameter:
    • For ContinuousLoad devices: From 15 (default) to 30
    • For MCU devices: From 6 (default) to 30
    
    Note: Changing this parameter will increase stability, but will decrease throughput.
11. Verify that the laser power for edge detection on the platesetter is correct:
    • On Lotem 400 platesetters, go to Utilities > Hardware > Expose System > Plate Edge Detection System and verify that the value of the Laser Power(mw) parameter is 30.
    • On Magnus 400 platesetters, go to Utilities > Hardware > Expose System > Plate Edge Detection System and verify that the value of the Laser Current(ma) parameter is 200.
12. Check the focus motor functionality:
    1. From the Operations toolbar, select Utilities > Hardware > Expose System > Focus Sytem and double-click Focus Motor.
    2. Perform edge detection while monitoring the focus motor movement in the Focus Motor dialog box.
    3. Verify that the focus motor position is consistent and that the optic lens reaches the correct focus level.
13. Verify that the focus values are correct for the 0.15 mm and 0.3 mm plates.
14. Verify that the carriage moves smoothly on the V block. There should be no more than 7 kg of resistance. If necessary, oil the V block.
15. On the platesetter, if diode 0 is spliced, work with the last diode in the registry.
16. Replace the Smart edge detection board.
17. Replace the Local3 board.
18. Replace the drum encoder.

Collecting Smart Edge Detection Log Files

To send log files to the Response Center (RC) on platesetters with Kodak Magnus 400 Controller 1.391 software, you must activate the edge detection log file collector.

1. On the destop, select Start > Run.
2. In the Run dialog box, type regedit.
3. In the Registry Editor window, locate HKEY_LOCAL_MACHINE\SOFTWARE\Kodak\Projects
   \Magnus400\IO OBJECTS\PLATE EDGE DETECTION SYSTEM
   \Plate Edge Detection System and change the Detailed Verbosity Level parameter value from 0 to 1.
4. Locate HKEY_LOCAL_MACHINE\SOFTWARE\Kodak\Projects
   \Magnus400\IO OBJECTS\PLATE EDGE DETECTION SYSTEM
   \Smart Plate Edge Card and change the Detailed Verbosity Level parameter value from 0 to 1.

   A smart edge detection log is created in the Log folder, which you can then send to the RC.
   Note: On platesetters with Magnus 400 Controller 1.392 software, log files are automatically created.

See also

Focus Preload

Technical contact(s)

Alon Davidor

Submitted by

Alon Davidor

Date submitted

25 Jun 2007