Heidelberg SM 102 Strange Errors

Hi All,
One of my friend is troubleshooting a 6 color SM102 year 1989 CP Tronics.
Machine stops randomly with some error codes but if they restart the press, machine runs normally for 1 0r two hours and then suddenly machine stops or rollers disengage, sheet braking rollers at delivery stop working or feeder or delivery pile stops going up or down.
Display on CP Tronics shows different errors T/MOTOR/EAK13/HAK02/NTK LA/NTK VRX.
Any Ideas what may be wrong?
Any help would be much appreciated.

 

I've seen similar symptoms and it wound up being a large voltage fluctuation coming into the plant. The only way they were able to diagnose it was to keep a running graph over a period of time, that monitored the drops and ,or spikes beyond what the presses electronics were able to adjust for.

 

Hi Sir
Good day.
I agree with mr Turboton 1052,I recoomend this : 1) Measure the Input Voltage to the main Control Board
or Panel for the machine Each hour and then after 2 hours when the problem occur, if the Voltage coming for 380 or 440Vca, or whatever, is dropping by 15% or Higher 15% IS
out of tolerance, if this Happen call to the Electrical Company, in order to adjust the Tap of Street Transformer.
2) Other great troubleshooting is the Power Supply Inside of the machine: The main trafo IN THE PRIMARY inside of the Speedmaster: Must Test with a Good tester DMM like FLUKE and Use your Schematic Diagrams : A) 100VCA+26VCA+35VCA+24VCA
B) b) In the side of secondary Transformer of the machine :+5VDC+24vdc+48VDC+120VDC+33VDC+36VDC+50VDC+120VDC
There are in the range NOT more+2.2% up or down. if they Are NOT, the Module is defective.
Of course with this Voltage missing or faulty, the Boards controlling differents function of the machine, Can be Corrupted, indicating
some Fault, or Error.
Let me know it, back to me any question, doubt or Help.
Blessing
superchoc@yandex.com

 

Thank You CHOCK and TT for your replies. I'll further update you after checking these steps.

 

Hi after carefully checking the transformer, there are intermittent voltage drops in the secondary transformer but main power source looks good.

 

Good day sir
Well, you Need to make 2 things:
1) Put the transforme without Load, and test it, and
see with happen with Only Supply Voltage.
If the Trafo, pass test the Trafo is Good, otherwise, the Winding(Inside is Reheating)
Not normally instrument can detect such FAULTY, only Megaohmeter(Special Expensive Test)
2) If the Trafo is O.k
Install Stabilizer Voltage Relais Heidelberg

 

If you have ESK pcb, try to change and observe.
Good luck

 

Check the condition of the motor brake.

 

Has your problem been resolved?