Product

• Lotem 800 Family
• Lotem 800 II Family

Error

Thermal head platesetters:

Exception Rcon error: Drum failed to reach position (Error code = 37716, Error Category = 07 - Fatal, device cannot recover).

Fiber head platesetters:

• Drum deviation error message
• Drum time out error message

Symptoms

The drum decelerates and drum speed deviations occur.

Cause

There are six possibilities that cause the drum to either decelerate or deviate in speed.
The six possibilities are listed according to their probability of causing the problem.
(1 - most likely cause; 6 - least likely cause)

1. Wall voltage is too high.
2. Interlock key and/or interlock is incorrectly postioned
3. Distribution board may need replacing.
4. Drum driver is not comp level P.
5. MCF board may need replacing.
6. Drum encoder may need replacing.

Solution

1. Save the platesetter’s registry.
2. Open the platesetter’s log file and save all operations.
3. Check the following:
   
   

   Wall voltage
   Make sure it is stable and conforms to the site preparation specifications.
   
   Interlock adjustment
   Make sure the interlocks and interlock keys are correctly positioned.
   
   24 V supply
   Make sure the voltage is adequate and conforms to the site preparation specifications.
   
   E-box voltage
   Make sure it is stable.
   
   MCF voltage
   Make sure it is stable.
   
   Wall phases
   Use an RX monitoring device to measure the wall phases.
   
   Fly off detectors
   Make sure the fly off detectors are correctly functioning.
   
   Distribution board
   Replace the existing distribution board.
   Thermal head platesetters: Order kit 518-01533A
   Fiber head platesetters: Order kit 518-01532A

Technical contact(s)

Nir Peleg

Submitted by

Nir Peleg

Date submitted

13 Apr 2005