UM3 UM3 randomly shutdown during print

[Macooki 1]

Hello,

 

I have a problem with my UM3: it restarts randomly during a print job.
I already had this problem a few weeks ago, it disappeared then reappeared. Now it's systematic and random during printing.

I first suspected my print head cable and changed it, it wasn't in great condition. That didn't change anything. 

 

Here's a list of different info:
- original printcores
- printbed heating is proceeding normally.
- machine fully reset

- test with different usb drive

- Cura 5.4 and 5.3 firmware

I think it may be my power supply failing, but I'd find it odd if it happened randomly during printing and not during heating.

 

 

I've attached all log files in a zip. Also, is there a tutorial to know how to interpret its?

 

Thank you!

 

log UM3.zip

Edited August 3, 2023 by Macooki

[thomasm 0]

I had the same problem, have you solved it yet?

[Macooki 1]

6 hours ago, thomasm said:

I had the same problem, have you solved it yet?

Nope 😢

How you've solved it?

Edited August 3, 2023 by Macooki

[Macooki 1]

Some news, i found a cable that was a little clamp, not cut at all, and change it.

Unfortunately nothing change...

I'll try dissasemble the printhead and check if everything is good.

 

[Dustin 144]

Sounds like a short, or a bad power supply.
See here: https://support.ultimaker.com/s/article/000002934

[Macooki 1]

I completly disassembly my printhead and deep clean it with isopropyl alcool, two things occur to me:

- the screw that hold printhead's pcb was a little loose, now it's steady. To be more accurate, the nut was not glue onto the PCB so the screw couldn't be tighten without holding the nut.

- there was some oil on the PCB

 

I think it was those two things that occur that crash

 

I just launch a print, i'll be back to tell you if it was these.

Edited August 4, 2023 by Macooki

[Macooki 1]

So it crash again, i'm going to buy a new power supply...

[Macooki 1]

And it was the power supply... Everything is perfect now

 

 

So for people questioning, if you can printing without any problem on your UM3 but your leds are flikering time to time, i think it's beginning of the failing power supply before it completly failed. With a new power supply leds lights aren't flikering anymore 😉

Edited August 14, 2023 by Macooki