Ultimaker 3 BIG issue

[IronRedstar 9]

Hello,

 

I desperately looking for help about an UM3. So, after repairing and updating the printer, I cleaning the nozzle when it hot and the machine shuted down after some seconds. I power off and power on after 10 seconds, the right fan turn constently and the boot mode stuck to "Ultimaker on the screen".

 

With the support of my reseller, I try to flash 2 times the firmware, was succeful, but don't resolve the problem. I have bought recently a new olimex card board and I don't see any changes !

 

I try to disconnect one a time some connector on the olimex and motion card but I can just power off the screen, or see message "there is a connexion problem with head...", but I know why because I disconnected the connexion of the head from the motion card.

 

I don't really know why I have this issue, all should be correct but not works. I seem it's not the Olimex board the problem, but where ???

 

I have see something about the old olimex between the new: there is no HDMI connexion on the new. Should I replace the new by the hold to see what append ?

 

And, for sure, nothing in database of Ultimaker, it's always like that....

[gr5 2,189]

This same problem happened to a friend of mine who had put a bad core into the print head and he shorted out a critical chip inside the print head which talks to the core.  He replaced the circuit board in the print head and the problem went away.

 

Your problem may be different but my advice is to replace that board first (around 120 euros I think) and then if that doesn't fix it replace the arduino PCB also (the one that connects to the print head).

 

Basically at some point during boot it gets stuck.  If you get the olimex cable then you can connect to the linux console inside the printer (username ultimaker password ultimaker) and look at the log files there.  But I think you will learn the same thing: replace head pcb.

 

More about olimex cable here:

 

 

[gr5 2,189]

Oh and ohm out those 5 pads on your cores - I suspect a short between the center pad and either of the pads on either side (should be open).   Or maybe the core just went in a bit crooked?  Seems very unlikely.  Unless you had a head flood and your whole head is warped just a little.

[IronRedstar 9]

Ok, little question: the electrical cable who connect the capacitive sensor, in the middle of the head, when the printer is on, there is electrical activity in idle mode or it's only during printing ?

[gr5 2,189]

Probably only when doing auto level.  I don't know 100%.

[IronRedstar 9]

Hello,

 

First, thank you for your help. It was the PCB. But, the connexion from the Ulti motion board to the PCB was ok, but not after. I want mean the start connexion to the printhead connexion (or fan part connexion). So, We can conclude it was a human mistake from myself and so a "short".