Lazer problems whit QMDI-Plus 46-4

Hello, I hope your help because we are already in a stalemate.
We have QMDI-plus that has a problem with engraving plaques.

The problem started only in section 2 Cian, after a time in section three also appeared the same problem.
The thing is that as many settings as we do on the lasers of each subsequent engraving we have a different result,
the engraving is on strips / apply a photo by test /

What did the technicians from Heidelberg Bulgaria do to date:
They checked the pressure and deaeration of the cooling system
We changed the black box in section 2 of Cian
We exchanged the boards for the individual sections / they are under the control panel to the QMDI / power box of the lasers.
They checked if there were bad sectors in the hard drive.
We checked the laser sections themselves for cracked glass or burned laser diodes, everything is all right there.


Is the new recommendation to replace the power box supply of the lasers?

Another thing I notice is that when the software is booted after the machine is turned on, the display shows / CMOS Batteries low/, I do not know if there is a connection with our problem but I ordered thebattery to be replaced.

I will be sincerely grateful for all the advice you could give me.

Stoyan

 

Dear Sir:
Hi hope you are well.
After I did saw all the steps and chage that our Colleague Heidelberg Did, maybe
Was a Good idea to Test the CMOS batteries low,first.
The reason is I did make some Schematic for You, in order to get a BASIC idea, a Powerfull idea How any Computer CPU work
in the world in Any machine. As Electronic +Electrical Eng BSSE +PE that i am am(now retired) and now taking my 4 career as
Software +IT Eng, will say very simple this statement: The software( in the ROM) tell to the system Example Motor 1 or Valve or Solenoid : Hey I am a Good conditionplease activate! and the motor or valve or the Solenoid will be receive the order for to work, very simple No?
However and the Inverse state Occur, if the Software is Corrupted , or does not Good Voltage(like CMOS Batteries) will proceed Not to work in a Good condition.
In short Suggest to wait the CMOS Batteries and replace it.
However I have a Good Level Doubt about the following:
Please Read Carefully: The LASER driver module, DI Unit has 2 boads:
1)Board Laser Driver Module, has a input for -12Vdc THIS voltage is very KEY,If there are NOT you have the problem in this circuit. you must do the same in the other 3 units , remember each unit has 2 board laser drive Module x4=8 Board laser Driver Module. Test the Power supply.
Since that i am assuming the my friend/colleague Exchange Power box of the lasers. BUT this he Measure the -12Vdc for any Power supply Laser Driver Module? Retest it, please.
Let me know, any question or doubt

 

Thank you CHOK, I will follow your advice! А few days ago we even replaced the whole power station for the lasers and there was no change!

 

What do you call the Power station ??
Please remember to follow the Steps carefully.

 

Translated:
I apologize for my English.
I want to say this / attach a photo / we changed it

 

Hello, we measured the performance of each laser control board, the values are
Black:- 11.80 / Сian: -11.91 / Magenta :-11.98/ Yelow:-11.93

The voltage values vary to -11.60 when the machine engraves plates

 

Hi sir,
.You have problem with -12VDC.,the voltage MUST NOT VARY.
is Only - 11.97 the tolerances you must adjust the TAP of trafo, and see if there are many variation.
If NOT, you must repair the laser connection board and laser driver module. Listen carefully this board has another power supply
the output is: +15VDC +5VDC -15VDC -12VDC in the laser driver module, for activated many IC, for Power up the Diode Laser.
In short if the -12Vdc if NOT good WILL NOT work efficiently the Laser PCB.
See the schematic diagrams for PCB.

 

Thank you very much! On Monday, I'm waiting for the technicians again and I will pass on what you shared with me!

 

Sorry, but the problem is not the power system, the voltage may vary, that does not have to the source, those source are - source power Switch - shared, so its value is between 11.7V to 12.1V, NONE 15V, in any case, the correct voltage is -12V approx. to feed the black boxes. The problem of omission is necessary to gather the data bus and cables that connects to the boxes, as well as check the temperature ... in case the cable for the time produces false contacts. The computer CMOS only makes the BIOS configuration of the computer lose, so when restarting the computer it would give you a configuration error. Between the burning process, it always removes the file from a copy from a partition hosted on the hard disk. in your case a test file. I recommend checking the black box of unit 2.

 

Hi Gents There is a PCB in the laser unit under the lasers try exchanging it with another unit and see if the fault moves,