If its possible to position the cable so you have a good connection and for that to not move can you test to see if the problem re-occurs. I am trying to discover if its a physical problem with the port or a different issue. For example, is there anything other than moving the cable that triggers the disconnection? Is the Phy IC (the KSZ8081RNACA identified above) getting hot? Or posisbly hot when the disconnection happens

I can reproduce that any time. When just switched on, while printing, after a print is finished. I fixed the cable with a cable tie to the frame of the printer, then it stays stable for some time. But as soon as the printer is moved or due to vibration while printing it can happen, that the position of the cable slightly changes and the connection is lost. When I reposition the cable, I can get it fixed again. But to be honest: A cable tie is not a solution for a 260 Euros board....

I left the printer on for an hour now, the chip is not getting hot, it is not even getting warm.

from your config.g you use 2,3,4 drivers for your Z axis. Which one was not moving? Is that permanent or intermittent now?

#3, permanent. I tried it several times today because I dismounted and remounted the board for the pictures in this thread. #3 is dead since I wanted to start a print yesterday. I switched the printer off on Monday and wanted to start a new print yesterday, and as I said above, while homing Z axis I saw, that one axis did not work. Luckily I was in front of the printer to interrupt otherwise it would have killed my bed. I never had that issue before. It just adds to the two other issues now...

The motor is not powered. I can turn this axis easily by hand, while the other two are blocked.

The Ethernet circuitry is quite a way from the stepper driver circuitry and relatively contained so I am not sure that the two issues are related to the same problem.

Just want to mention the filament switch again. The mechanism is foolproof. The microswitch can only trigger, when there is no filament in. Nevertheless I sometimes get "filament out" messages in the middle of a print, although filament is fine. Because I never found a reason for that, when it happened again I tested, if I was able to resume the print without doing anything but clicking on resume. I did not change anything at the filament or the switch. And, miracle, it just continued printing.

Something is definitely wrong with this board and it is getting worse. So I finally filled out the warranty form today.

BTW: I'm running a Duet2 with. Duex5 expansion now for some time on another printer. Never had any issue with that board and it printed quite a lot The printer is also nearly an identical build but a little smaller. Using the same motors, switches, etc.

Best regards,

@Phaedrux said in Duet3 mainboard failing more and more:

@Nobser said in Duet3 mainboard failing more and more:

Something is definitely wrong with this board and it is getting worse. So I finally filled out the warranty form today.

Don't forget to include a link to this forum thread as authorization.

Didn’t forget

If its possible to position the cable so you have a good connection and for that to not move can you test to see if the problem re-occurs. I am trying to discover if its a physical problem with the port or a different issue. For example, is there anything other than moving the cable that triggers the disconnection? Is the Phy IC (the KSZ8081RNACA identified above) getting hot? Or posisbly hot when the disconnection happens

I can reproduce that any time. When just switched on, while printing, after a print is finished. I fixed the cable with a cable tie to the frame of the printer, then it stays stable for some time. But as soon as the printer is moved or due to vibration while printing it can happen, that the position of the cable slightly changes and the connection is lost. When I reposition the cable, I can get it fixed again. But to be honest: A cable tie is not a solution for a 260 Euros board....

I left the printer on for an hour now, the chip is not getting hot, it is not even getting warm.

from your config.g you use 2,3,4 drivers for your Z axis. Which one was not moving? Is that permanent or intermittent now?

#3, permanent. I tried it several times today because I dismounted and remounted the board for the pictures in this thread. #3 is dead since I wanted to start a print yesterday. I switched the printer off on Monday and wanted to start a new print yesterday, and as I said above, while homing Z axis I saw, that one axis did not work. Luckily I was in front of the printer to interrupt otherwise it would have killed my bed. I never had that issue before. It just adds to the two other issues now...

The motor is not powered. I can turn this axis easily by hand, while the other two are blocked.

The Ethernet circuitry is quite a way from the stepper driver circuitry and relatively contained so I am not sure that the two issues are related to the same problem.

Just want to mention the filament switch again. The mechanism is foolproof. The microswitch can only trigger, when there is no filament in. Nevertheless I sometimes get "filament out" messages in the middle of a print, although filament is fine. Because I never found a reason for that, when it happened again I tested, if I was able to resume the print without doing anything but clicking on resume. I did not change anything at the filament or the switch. And, miracle, it just continued printing.

Something is definitely wrong with this board and it is getting worse. So I finally filled out the warranty form today.

BTW: I'm running a Duet2 with. Duex5 expansion now for some time on another printer. Never had any issue with that board and it printed quite a lot The printer is also nearly an identical build but a little smaller. Using the same motors, switches, etc.

Best regards,

@droftarts I agree with you. I was also thinking about the soldering and checked with magnifier but cannot find anything wrong, neither. That's why I'm thinking about something like a "hairline crack" (dont know, if it is the correct English word ) A very small crack in/on the board. This will also somehow explain the irregulary filament switch (depending on the temperature of the board). May perhaps explains the driver failure,too. After cooling down the crack might spread over the board. But just an idea.

As you can see a lot of the chips on the back are not covered. I always thought this might be diagnostic pins.

But even if overheated (printer is operated in cool conditions) please check the video. It is also some kind of mechanical issue. When I find the correct position and get it fixed, there are no transmission issues. Board is mounted vertically with about 1cm distance from back, so cooling is fine.

@felek Did it and nothing changed.

New config.g: config (1).g

Diagnostic: Diagnostic.txt

Video of Ethernet-Port-Issue: https://youtu.be/tphNxyEROC4

SBC or standalone?

Standalone

Did you try other motor on Z axis?

Yes. Motor works on another driver, other motor does not work on same driver.

Put M122 when internet issue occured

Might not be necessay. It can be seen on the link LED of the ethernet port. It switches on and off when slightly pushing or pulling the cable. So it is a hardware issue. But will add information, when board is back in printer after doing the photos

Put photos Z driver and whole board

attached:

Put config.g

attached: config.g

[Firmware version?]

Release 3.2.2.

Hi there!

My new DUET3 is failing more and more. In the last few days I first had inexplicable "filament out" messages, although the associated switch had not triggered. A few days later I had some network trouble. I found out that the ethernet port switched on and off when slightly pushing or pulling the ethernet cable (like a loose connection, but the cable clicked in properly. I also used different cables, same result). Yesterday one of the stepper drivers failed (driver #3). No configuration or hardware change, just switched the printer on and while homing I saw, that one of the z-axis was not moving any more (motor and harness is fine, I checked that!)

Due to the fact, that all the connectors are in the same area of the board it sounds to me like a hairline crack in the circuit board. But there is no damage visible on the board, also no blown driver or similar. Board was bought in December 2020 (Revision 1.01).

The board worked fine before. It's also not the first 3D printer I've built, another has been running flawlessly with the Duet2 board for two years now.

Anything else I should check or do you agree, that this is a hardware failure?

Best regards,
Norbert