Product

• Kodak^® Lotem^® 400 small platesetter
• Kodak Lotem 400 Quantum platesetter
• Kodak Magnus™ 400 platesetter (with LDA head)
• Kodak Magnus 400 Quantum platesetter

Background

The edge detection system relies on the image-to-edge concept. When using the edge detection system, if the plate height is not exactly the size it is supposed to be, the image between the plates will not be correctly registered. To avoid this problem, cancel edge detection and perform image exposure according to image-to-punch.

Requirements

Parts and Tools

Procedure

This procedure includes the following sections:

• Removing the Spoiler
• Installing the Central Punch Pin
• Defining the Punch in the Registry
• Disabling the Edge Detection System
• Adjusting the Image-to-Punch Position

Removing the Spoiler

1. Verify that the front and side doors of the platesetter are open and that the platesetter is shut down and disconnected from the main power supply.
2. If there is center punch groove on the drum, go to Installing the Central Punch Pin.
3. At the front of the platesetter (loading direction), from the middle spoiler on the drum, remove the two hex screws, and then remove the spolier.

Fix spoiler	Spring spoiler

4. Install the drum drilling jig in place of the spoiler that you removed in step 3.
   
   
   
   
5. Before drilling, place a piece of protective cloth or paper over the drum area to prevent slugs and debris from getting into the platesetter.
6. Insert the 12-mm drum drilling tool from the kit into the drill, and then drill to a depth of 1 mm.
   
   
   
   
7. Remove the drill and the jig from the drum.

Installing the Central Punch Pin

1. At the rear of the platesetter, uninstall the unloading assembly by removing the two screws that secure it, and disconnect any relevant connections.
2. Install the new spoiler on the drum.
   
   

   Center pin for fix spoiler	Center pin for spring spoiler

   
   
3. Verify that there is a spare locking nut in the center of the punch bar.
   
   
   
   
4. If there is not a spare locking nut, mark the location of each of the existing punches.
5. One by one, remove the two punches on the left side of the middle punch, and then remove the middle punch.
6. Thread the locking nut into the groove to the location in the middle of the punch bar where the new punch will be installed.
   
   
   
   
7. Install the punch and tighten the hex screw into the locking nut.
   
   
   
   
8. Connect the punch connector to the punch 3 Molex™ connector.
9. Reinstall the unloading assembly.

Defining the Central Punch in the Registry

1. In the Kodak Controller software, locate IO OBJECTS\Loader\Detectors\Punch Motor#3 Home Pos. Detector and change the Open parameter value from 0 to 1.
2. Locate IO OBJECTS\Loader\Detectors\Punch Motor#3 and change the Open parameter value from 0 to 1.
3. Locate IO OBJECTS\Punch System and change the Open parameter value from 0 to 1.
4. Define the center punch as a spiral punch unit by locating
   IO OBJECTS\Punch System\Punch System and changing the Punch Spiral unit parameter value from none to Punch Motor #03.
   Note: This ensures that this punch punches every plate, even if there is no punch selected.

Disabling the Edge Detection System

1. In the Controller software, select Settings > Media Definition.
2. In the Media Definition dialog box, in the Media List area, select the relevant customer media (in Engineer mode), and then click Adv.
3. In the Media Advanced Properties dialog box, select Centring Punch.
   
   
   
   
4. If the platesetter is a Quantum platesetter:
1. In either SPlot or Service Shell, disable edge detection from the TMCE board.
2. At the command prompt, type access dev, and then type option edgedetect disable.
   Note: You must also perform centering the image on the plate from the TMCE. Perform one of the following actions:
   • At the TH2>> prompt, type set h1c sssa (the value is in mil = 1/1000 inch), and press enter.
   • At the Quantum>> prompt, type set hdp sssa (the value is in mil = 1/1000 inch), and press enter.
5. If the platesetter is a fiber head platesetter,in the registry, locate either Lotem400\EXPOSE or Magnus400\EXPOSE and change the Plate Edge Detection Enable parameter value from 1 to 0.

Adjusting the Image to Punch Position

1. If the platesetter is either a Lotem 400 FH or Lotem 400 Quantum platesetter, in the registry, locate Lotem400\MACHINE\ and adjust the Height Start Image Area (mm) parameter value accordingly.
2. If the platesetter is a Magnus 400 platesetter with software earlier than version 3.91, in the registry, locate Magnus400\MACHINE\ and adjust the Height Start Image Area (mm) parameter value accordingly.
3. If the platesetter is a Magnus 400 platesetter with version 3.91 software and later, in the registry, locate Magnus400\MACHINE\ and adjust the Drum Edge Position parameter value accordingly.

Test

Load a plate and verify that the plate does not touch the central pin.

Technical contact

Content owner: Alon Davidor
See the Escalation page for escalation contacts.

Date submitted

18 Mar 2007