Drum don't stop on a Creo Lotem 800V2

[A_L_E_X]

I have a problem with a Creo Lotem 800V2. Randomly, when the exposure is at the end, the drum don't stop so that the plate can exit. I mean, in normal operation, the drum stops in about 2 seconds. Well, randomly, the drum stops after about 5 minutes and because of this i get an error message. Is there a braking system inside to stop the drum ? Where can i find it ? Someone have a service manual for this CTP ? Thank you in advance !

[A_L_E_X]

Now, the drum stops even when it's exposing plates. I mean , the plate is being exposed and the drum starts to slow. Only after the drum stops and i open any cover, i can unload the plates on drum. I don't think it's the encoder because the speed it's showed fine. The ctp just looses control over the drum. But i'll chech the wires just to make sure. Where is the encoder connected to ? To that electronic board near it ?

[PACH]

Originally Posted by A_L_E_X

Now, the drum stops even when it's exposing plates. I mean , the plate is being exposed and the drum starts to slow. Only after the drum stops and i open any cover, i can unload the plates on drum. I don't think it's the encoder because the speed it's showed fine. The ctp just looses control over the drum. But i'll chech the wires just to make sure. Where is the encoder connected to ? To that electronic board near it ?

Alex,

do you get any error messages when the problem occurs with the drum?
Waht happens when you do a Drm Init from the Loading system?

[PACH]

Alex,
It could be the MCF board or the Drum POwer Supply ( ELMO) that is playing up.

[A_L_E_X]

When the problem occurs i get the message that the drum didn't stopped in the specified time. Also i get this message if i init the drum because the drum don't want to move. I cannot even rotate the drum from the hardware/drum/drum motor. The drum don't want to move unless i open and close a cover. Then if i click drum init, the drum initialize fine and i can unload the plate.
PACH, the drum power supply is in the back of the diode panel ? I have found 2 power supplies that were full of dust. Do you think that the problem could be from there ?

[PACH]

Originally Posted by A_L_E_X

When the problem occurs i get the message that the drum didn't stopped in the specified time. Also i get this message if i init the drum because the drum don't want to move. I cannot even rotate the drum from the hardware/drum/drum motor. The drum don't want to move unless i open and close a cover. Then if i click drum init, the drum initialize fine and i can unload the plate.
PACH, the drum power supply is in the back of the diode panel ? I have found 2 power supplies that were full of dust. Do you think that the problem could be from there ?

Alex,
The Drum Power Supply is in the Distribution Box under the Power Distribution Board. You have to take the rear panel off to get to these parts. Do not touch anything inside before disconnecting the 3 phase. The MCF board is in the Electronics crate.
Let me know the exact error messages that you receive.

[A_L_E_X]

The distribution box is that box with automatic fuses on it where the power cable goes in ? Where is that electronic crate where i can find the MFC board ?

[A_L_E_X]

When the problem occurs i get the following messages :
Drum Motor Goto speed task timeout.
The task Drum Motor Go Speed failed.
The task Unload Manager task failed.
Can't unload Plate->Plate on drum exist.

[PACH]

Originally Posted by A_L_E_X

When the problem occurs i get the following messages :
Drum Motor Goto speed task timeout.
The task Drum Motor Go Speed failed.
The task Unload Manager task failed.
Can't unload Plate->Plate on drum exist.

Hi Alex,

Please check and adjust if you can the following:


Check that 5.1V VCC provided from PS in E-box reaches MCF board.
This is the last board that receives the power from the PS
The PS (5.1V) is located at bottom of E-Box.
There are two T.P. on the MCF board: GND and +5v
It is not very easy to get to the POT to afjust this.
Remove the lower rear pannel and you will see with a torch the POT inside the PSU under the Electronics box.
Adjust this to 5.1v.
If all tis fails thyan it is the MCF or the Drum PSU. ( ELMO)
Good luck

[A_L_E_X]

I've noticed that if the air is cooler, the problem appears rarely. Might be the temperature of the power supply ? Where is the MCF located exactly ?