SM-52 Problem with main motor

Hello. I just found this forum today. Im from Croatia and I'm working on a SM-52-2-P.

It has a problem with the main drive motor, it will not start. When you try to start the machine, it beeps normally, and then when it should start just the motor brake clicks and disengages but the motor will not spin.

When it boots up it has some INIT and DIA errors, but I dont know what they mean.


20190910_112301 by Marko Hreščan, on Flickr


20190910_112327 by Marko Hreščan, on Flickr


20190910_112337 by Marko Hreščan, on Flickr


20190910_112414 by Marko Hreščan, on Flickr


I did check the encoder, and it works fine. The BLT board had some cold solder joints on X3 connector, but that did not solve the issue. I did try to resolder the connectors on the BLT board, but with no luck.

Does anyone know what to look for next? Or an explanation to the INIT and DIA errors and where to look for a problem?

Thanks in advance.

 

Hi sir :
please do this:
MSK reports general fault signal; press stops.

1)The main switch must be turned off and on again!

2)Overvoltage in 250V / 540V DC intermediate circuit or voltage
higher than 48 V DC for Brake,

3)or Brake Faulty , test for mechanical failure or electrical problem.

4) Mains voltage phase failure

5)48V DC voltage outside the tolerance range, for Brake.

 

Thanks for the help. Will try to test and measure that today.

The motor brake works OK, mechanically and electrically. When we put the hand crank, you can hear a click from the brake and the machine spins freely by hand.

 

ok. sir
Test it.

 

I have the same problem, my photo display on my machine's touch screen, are these numbers good / reasonable or bad?
I included the picture

 

Hi sir:
Was traveling from my country Nicaragua to USA, arrived yesterday for to visit my relatives.
Sorry for my delay.
1) If you say that everything is o.k , now
2) You must test very well the Brake , can be damaged
3) Test and adjust the HW1 encoder.

 

@ mr. Chock

thank you for helping me, you are amazingly kind.
may you always be in good condition and always in the protection of the almighty god.

I have tested the brakes, the results are good, testing with manual crank control and when the engine is on standby, the results are lightweight and unlocked. but when inching is done the machine responds to the action about to spin but immediately stops. and strangely every time it is turned back by means of manual cranking, the machine can inch briefly then stop again, even able to run properly, but when I try to increase the speed of the engine speed suddenly stops.

I am very confused about this problem, it's been 7 days this machine can not be used.

if you have a little free time please guide me to get out of this problem.

I want to say thank you for your help.

note:
this is a problem that befell me.

https://www.colorprintingforum.com/threads/main-drive-malfunction-help-me-please.20267/

 

Hi thank you by his words.

1) About the brake, the winding is reheating( Not burning this is special cases, that occur in the troubleshooting machines.

However is a hidden problem, since the ONLY the experience give that real conclusion, by that reason i strong recommend you
that replace the Brake, or Rewinding.

2) Adjusting the HW1, is the matter that mechanic or the electrician tech, must be in charge. Specially coming from Heidelberg, or some Tech that are familiar-training with Heidelberg Machines, and with the properly Tools, for adjusting .
Otherwise you must waste :Time + Money .

 

What are the actual errors on the press at the moment? The problem you describe sounds like a problem of the main motor encoder itself, if the press runs once it is cranked then it very likely a problem of the main motor encoder

 

Hello. OP here again.

Sorry for not responding sooner, but some other technicians were called to solve the issue, and they still haven't solved the problem.

So, the problem is still the same. In the mean time, the technicians that were working on the machine changed the motor encoder and motor board but the problem was still the same and nothing changed.

They mentioned that the errors ZSKA_CTR 7FDF and BLT_CON 3FEF are for the motor code and that's the main problem. We took the motor out and checked the motor code resistors (2.7K and 12.1K if i remember correctly) and they are good values and there is a connection to the board from those resistor to the TTK board and then to the ZSK board.

Is there a posability that the ZSK board doesnt recognise the motor and that's why it wont start? Is there something else i could check or I'm missing?

 

Hi,
1- Did you get this problem during production or after switching on?
2- You said, your technician changed the motor board, what do you mean by "motor board"? Can you define it?
3- Did they check "actual values" of main motor? Can you read "intermediate voltage" or "motor code" and other values related? Send a photo from that page as well.

Good luck,

 

Hello.

1 - In the beginning the problem was intermittent, i don't think the machine ever stopped during production (have to check with the operator) but mostly when the operator stopped the production and then tried to start again the motor wouldnt move. You could hear the motor brake disengage but the motor wouldn't move. Sometimes a restart of the machine worked, or waiting for some short period of time. And then it would work good for a week or a couple of days. In the end this problem was active after switching on and the machine would move at all.

2- The motor encoder was changed, and the 3 IGBT modules on the BLT board are replaced because one of them was faulty (i thought the whole board was changed, i just spoke to him now). But the problem was still active after they changed part by part. The motor was also checked over and they said everything is fine with the motor itself.

3- Can you clarify a bit more what exactly to check? Resistor values of the motor, or voltage values when it tries to start? The pages with the errors are in the first post, the motor is out of the machine ATM, but ill see if i can get the motor back in to record the errors again.

 

Hi,
1- I believe in the beginning you had problem with main motor brake. I had seen many times that brake is burnt out due to TTK malfunctions. I'm quite sure soon or late you will face this issue.
2- I had repaired many BLT boards. IGBTs are the most common parts that I replace, but it's very important to know how an IGBT is broken. Ofcourse you can see visually if one of them is blown out or exploded but on the other hand it s important to check IGBT driver circuit. Many times this circuit has got damaged and to be honest, it's quit difficult to check and test it.
3- What I need you to check is as following:
Push Service button----> Select V/A button----> here you can see actual values of BLT_CON and motor code. Take a photo from this page and send it for us. It's very important to check these values, I can tell you then if main motor is recognized by machine or not.

Good luck,

 

1- I dont think the motor brake was a problem, you can hear it clearly, it "clicks" when it disengages and engages and the motor spins freely when it disengages.

I took a video of the screens, hopefully i got all the right ones, if you need any more screenshots or anything that i might have missed, please let me know. I really dont know what to do anymore . . .

 

Can you take a photo from Service---> Service 2---> V/A---> Motor-Kennwerte. I can't read all the values.

 

2020-01-23_09-09-58 by Marko Hreščan, on Flickr

 

Hi,
In your explanation, you said that technician replaced the complete motor board. Did he replace it? If so, what is TTK part number? I assume the existing TTK is not compatible with this machine. Can you send photos from TTK and BLT labels?

 

No, I assumed he changed the board, but all he did was change the IGBT's, nothing else. No boards were exchanged. All boards are the original ones that the machine had. The only thing he tried to change was the motor encoder, but that made no difference.

 

So I guess TTK is defective.

 

You sure?

Anything I can check? Do you have any schematics of the board?