Product

• Kodak^® Magnus^™ 200 platesetter
• Kodak Magnus 400 platesetter
• Kodak Magnus 400 Quantum platesetter
• Kodak Lotem^® 400 platesetter
• Kodak Lotem 400 Quantum platesetter
• Kodak Lotem 400 Xpose^™ platesetter

Background

When the platesetter fails to load or unload plates because the grippers are not operating properly, you need to calibrate the grippers.

During the gripper calibration process, you will:

• Locate the drum position when the head gripper is above the actuator (loading position)
• Locate the drum position when the head gripper is below the actuator (unloading position).
  
  

  

• Lock the drum in place with the actuator
• Read the drum encoder value

Procedure

Before you begin:

1. On the platesetter, if applicable, remove the cheater to disconnect the motor interlock.
2. Manually drag the tail gripper to the end of the drum track until it is parallel to the head gripper (preload position).
   
   
   
   
3. Insert the cheater to reconnect the motor interlock.

This procedure includes instructions for:

• Verifying service engineer mode
• Calibrating the load head grippers
• Calibrating the unload head grippers
• Calibrating the tail grippers (preload)

Attention: To calibrate grippers, the drum index must be correctly adjusted.

Verifying service engineer mode

Before you can configure the grippers, you must verify that you are working in Service Engineer mode.

1. In the Magnus or Lotem Controller software, on the Operations toolbar, select Utilities > Users.
   
2. In the Define User window, in the User Type list, select Service Engineer.
3. In the Password box, type the appropriate password and click OK.
   Note: The password is case-sensitive.
4. On the Operations toolbar, select Utilities > Hardware.
   
5. In the Hardware window, expand the Loading System branch and double-click the Loading System node.
   
6. In the Loading System Dialog window, under Initializing, click Drum.

Calibrating the load head grippers

1. In the Hardware window, open the following windows:
   • Drum Motor—expand Drum System and double-click Drum Motor.
   • Left Load Gripper End Pos. Detector—expand Drum System > Gripper System > Load Gripper and double-click Left Load Gripper End Pos. Detector.
   • Left Load Gripper Home Pos. Detector—expand Drum System > Gripper System > Load Gripper and double-click Left Load Gripper Home Pos. Detector.
   • Load Gripper enable Detector—expand Drum System > Gripper System > Load Gripper and double-click Load Gripper Enable Detector.
   • Load Gripper Valve—expand Drum System > Gripper System > Load Gripper and double-click Load Gripper Valve.
   • Right Load Gripper End Pos. Detector—expand Drum System > Gripper System > Load Gripper and double-click Right Load Gripper End Pos. Detector.
   • Right Load Gripper Home Post. Detector—expand Drum System > Gripper System > Load Gripper and double-click Right Load Gripper Home Pos. Detector.
2. To verify that the Load Gripper Enable detector is working properly:
   1. In the Drum Motor window, on the Operation tab, select Position and:
      • For a Magnus platesetter, type –218
      • For a Lotem platesetter, type –207
   2. In the By speed box next to Position, type 100.
   3. Click Start.
   4. In the Load Gripper Enable Detector window, verify that the Load Gripper Enable detector is ON.
3. To verify that the left and right load-gripper end-position detectors and the left and right load-gripper home-position detectors are working properly:`
   1. In the Load Gripper Valve window, on the Operation tab, click Start.
   2. Verify that the left and right load-gripper end-position detectors and the left and right load-gripper home-position detectors change from ON to OFF.
   3. In the Load Gripper Valve window, click Stop.
4. On the platesetter, to visually verify that the gripper actuator operates smoothly:
   1. In the Load Gripper Valve window, on the Operation tab, click Start.
   2. During drum entry and exit, verify that the gripper actuator's piston air valves operate smoothly.
   3. Verify that the left and right, end- and home-position detectors change simultaneously from OFF to ON when the gripper actuator presses on the head grippers.
      If they are not synchronized, adjust the gripper actuator piston air valves.
   4. In the Load Gripper Valve window, on the Operation tab, click Stop.
      
5. Update the registry with the correct open and close gripper-actuator position:
   1. In the Load Gripper Valve window, on the Operation tab, click Start and:
      • For a Magnus platesetter, the gripper actuator activates at position –218.
      • For a Lotem platesetter, the gripper actuator activates at position –207.
        
   2. Remove the interlock cheater to manually rotate the drum.
   3. When the load gripper turns on and the gripper actuator presses on the grippers, manually rotate the drum forward until the gripper actuator touches the edge of the head gripper's slotted groove.
   4. In the Drum Motor window, on the Operation tab, find the current drum motor position and write it down.
   5. In the registry, go to Loading System\Loading System Setup\Load Head Gripper Location (mm) and type the value that is 2 mm less than the drum position that you wrote down in the previous step.
   6. In the Load Gripper Valve window, on the Operation tab, click Stop.
   7. On the gripper actuator, close the security washers on the piston air valves.
      
      

    

Calibrating the unload head grippers

1. In the Hardware window, open the following windows:
   • Drum Motor—expand Drum System and double-click Drum Motor.
   • Left Unload Gripper End Pos. Detector—expand Drum System > Gripper System > Unload Gripper and double-click Left Unload Gripper End Pos. Detector.
   • Left Load Gripper Home Pos. Detector—expand Drum System > Gripper System > Unload Gripper and double-click Left Unload Gripper Home Pos. Detector.
   • Load Gripper enable Detector—expand Drum System > Gripper System > Unload Gripper and double-click Unload Gripper Enable Detector.
   • Load Gripper Valve—expand Drum System > Gripper System > Unload Gripper and double-click Unload Gripper Valve.
   • Right Load Gripper End Pos. Detector—expand Drum System > Gripper System > Unload Gripper and double-click Right Unload Gripper End Pos. Detector.
   • Right Load Gripper Home Post. Detector—expand Drum System > Gripper System > Unload Gripper and double-click Right Unload Gripper Home Pos. Detector.
2. To verify that the Unload Gripper Enable detector is working properly:
   1. In the Drum Motor window, on the Operation tab, select Position and:
      • For a Magnus platesetter, type –584
      • For a Lotem platesetter, type –551
   2. In the By speed box next to Position, type 100.
   3. Click Start.
   4. In the Unload Gripper Enable Detector window, verify that the Unload Gripper Enable detector is ON.
3. To verify that the left and right unload-gripper end-position detectors and the left and right unload-gripper home-position detectors are working properly:
   1. In the Unload Gripper Valve window, on the Operation tab, click Start.
   2. Verify that the left and right unload-gripper end-position detectors and the left and right unload-gripper home-position detectors change from ON to OFF.
   3. In the Unload Gripper Valve window, on the Operation tab, click Stop.
4. On the platesetter, to visually verify that the gripper actuator operates smoothly:
   1. In the Unload Gripper Valve window, on the Operation tab, click Start.
   2. During drum entry and exit, verify that the gripper actuator's piston air valves operate smoothly.
   3. Verify that the left and right, end- and home-position detectors change simultaneously from OFF to ON when the gripper actuator presses on the head grippers.
      If they are not synchronized, adjust the gripper actuator piston air valves.
   4. In the Unload Gripper Valve window, on the Operation tab, click Stop.
      
      
      
      
5. Update the registry with the correct open and close gripper-actuator position:
   1. In the Unload Gripper Valve window, on the Operation tab, click Start and:
      • For a Magnus platesetter, the gripper actuator activates at position –584.
      • For a Lotem platesetter, the gripper actuator activates at position –551.
        
   2. In the Drum Motor window, turn off the drum motor.
   3. When the load gripper turns on and the gripper actuator presses on the grippers, manually rotate the drum forward until the gripper actuator touches the edge of the head gripper's slotted groove.
   4. In the Drum Motor window, on the Operation tab, find the current drum motor position and write it down.
   5. In the registry, go to Machine\Unload Head Gripper Location (mm) and type the value that is 2 mm less than the drum position that you wrote down in the previous step.
   6. In the Unload Gripper Valve window, on the Operation tab, click Stop.
   7. On the gripper actuator, close the security washers on the piston air valves.

Calibrating the tail grippers (preload)

1. In the Hardware window, open the following windows:
   • Drum Motor—expand Drum System and double-click Drum Motor.
   • Left Unload Gripper End Pos. Detector—expand Drum System > Gripper System > Unload Gripper and double-click Left Unload Gripper End Pos. Detector.
   • Left Load Gripper Home Pos. Detector—expand Drum System > Gripper System > Unload Gripper and double-click Left Unload Gripper Home Pos. Detector.
   • Load Gripper enable Detector—expand Drum System > Gripper System > Unload Gripper and double-click Load Gripper Enable Detector.
   • Load Gripper Valve—expand Drum System > Gripper System > Unload Gripper and double-click Unload Gripper Valve.
   • Right Load Gripper End Pos. Detector—expand Drum System > Gripper System > Unload Gripper and double-click Right Unload Gripper End Pos. Detector.
   • Right Load Gripper Home Post. Detector—expand Drum System > Gripper System > Unload Gripper and double-click Right Unload Gripper Home Pos. Detector.
2. To verify that the Unload Gripper Enable detector is working properly:
   1. In the Drum Motor window, on the Operation tab, select Position and:
      • For a Magnus platesetter, type 208
      • For a Lotem platesetter, type 191
   2. In the By speed box next to Position, type 100.
   3. Click Start.
   4. In the Unload Gripper Enable Detector window, verify that the Unload Gripper Enable Detector is ON.
3. To verify that the left and right unload-gripper end-position detectors and the left and right unload-gripper home-position detectors are working properly:
   1. In the Unload Gripper Valve window, on the Operation tab, click Start.
   2. Verify that the left and right unload-gripper end-position detectors and the left and right unload-gripper home-position detectors change from ON to OFF.
   3. In the Unload Gripper Valve window, on the Operation tab, click Stop.
4. On the platesetter, to visually verify that the gripper actuator operates smoothly:
   1. In the Unload Gripper Valve window, on the Operation tab, click Start.
      
   2. During drum entry and exit, verify that the gripper actuator's piston air valves operate smoothly.
   3. Verify that the left and right, end- and home-position detectors change simultaneously from OFF to ON when the gripper actuator presses on the tail grippers.
   4. In the Unload Gripper Valve window, on the Operation tab, click Stop.
      
      
      
      
5. Update the registry with the correct open and close gripper-actuator position:
   1. In the Unload Gripper Valve window, on the Operation tab, click Start and:
      • For a Magnus platesetter, the gripper actuator activates at position 208.
      • For a Lotem platesetter, the gripper actuator activates at position 191.
        
   2. In the Drum Motor window, turn off the drum motor.
   3. When the load gripper turns on and the gripper actuator presses on the tail grippers, manually drag the drum with the tail grippers until it is parallel to the edge of the drum groove.
   4. In the Drum Motor window, on the Operation tab, find the current drum motor position and write it down.
   5. In the registry, go to Loading System\Drum\Init Tail Gripper Pos (mm) and type the value that you wrote down in the previous step.
   6. In the Unload Gripper Valve window, on the Operation tab, click Stop.

Technical contact(s)

Content owner: Mario Amir
See the Escalation page for escalation contacts.

Date submitted

07 Aug 2006