Random/Intermittent/Sometimes continuous MCU Shutdown

General Discussion
1

Dowell3d DM10 Pro - X Large Format printer

the MCU and SBC are proprietary boards
The SBC is at the front of the machine, the MCU at the rear and are connected via a shielded 3 wire cable, a UART type connection I believe.

The printer was a recent purchase and since arrival we have failed to print anything either reliably or successfully and is now becoming a major issue. The supplier has been of little help in trying to resolve this problem. I would be very grateful for any help or advice offered.

The failure appears to be completely random but as far as I can tell it is always a MCU related failure. Sometimes I cannot get past the System Restart screen as it just rolls from shutdown to shut down, sometimes it starts up and appears to be quite stable we attempt a print and inevitably it shuts down mid print.

So far, we have replaced the MCU serial connection cable, with a fully shielded cable, we have checked continuity, and it seems good.

We have replaced the power relay because that failed, I had it repaired locally as it again it is a proprietary item. The Xener diode and an LED had failed, now working correctly.

We have tried providing independent power supplies to the MCU and SBC boards.

None of the above seem to have had any impact on this random failure.

The machine was tested before it left the factory, to be shipped to NZ, it has not been fully functional since re-assembly and I wonder whether shipping has introduced a fault somewhere.

Any insights would be welcome, any diagnostic steps, anything! I have now been working through this issue for 3 weeks, without any real progress.

I have attached the latest Klippy log
klippy (11).log (1.9 MB)

2

Hello @Ildocteur !

As the modified Klipper software appears to be.

Git version: 'v0.11.0-491-g21bfae27-dirty'

The log looks quite different in contrast to a genuine Klipper install.

It’s quite hard to say what there was changed

What I can see is

Invalid oid type

as the most appearing cause for the shutdown.

You may have a look on this:

3

Hi @EddyMI3D,

Thanks for your thoughts on this, and for taking the time to help. I get from this that it is most likely a hardware issue. I do wonder whether I have damaged card as a result of transportation, something like a hairline crack. The problem certainly increases in frequency as the day progresses, which I guess may indicate heat or fatigue related degradation.

Thanks

4

We bought a DM10Pro with dual extrusion here in Brazil, I’ve got it after a lot of people messed with it, but it had the same problem, and it’s solved now (we have other problems, but at least that one doesn’t happen anymroe), they sent us a new SBC, and we properly grounded the machine, as it wasn’t before, an error on our part.

It was a power issue, even the screen was turning off from time to time, it kept blinking.

Now we’re having a really awful problem, that the X axys doesn’t move as much as it should, comanding to move the 800mm only moves 750mm, and it’s an easy fix, if we had access to the machine firmware, but it’s locked, so we can’t change the X axys motor rotation.

We’ve been in touch with them for a while, they don’t know much about the printers they build, but they at least sent us some new parts on warranty.

Do you happen to have their firmware open? If so, can you share it?

5

Hi,
We have had endless problems with the DM10pro that we bought. To the point where I would advise anybody not to purchase one of these machines.

We ended up having to replace both main boards. Whilst they have provided the spare parts every issue we have is a prolonged process of fault finding directed by their team. It is not a sustainable process for us and we still after months cannot produce reliable outputs.

I did get their team to access our machine remotely to make adjustments so it is possible but they are very difficult to work with.

I have now bought new generic control boards to fit to the machine so that we can program it directly.

Sorry I can’t be anymore help

6

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.