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    Dead PanelDue 7I

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    • droftarts
      droftarts Moderator @MikeD last edited by

      @MikeD Sorry, I'm a bit late to the discussion. We're just discussing this amongst ourselves. All I can say at the moment is that I've destroyed a RAMPS board in the past, by moving the motors. They effectively act like generators, and the voltage can escape the stepper driver and cause all manner of problems, depending on the voltage (proportional to speed the stepper is moved) produced. I don't know if there is protection in the stepper drivers, or on the Duet, for this.

      The other think is that leaving the PanelDue for a while (eg 24 hours) may make it come back. I'd try it again after a reasonable amount of time, and see if it works. You can replace the PCB, but then it may be the display or backlight that has failed!

      Your PanelDue is within the warranty period, but I'm not sure if this would count as a warranty replacement. We're just discussing that.

      Ian

      Cartesian bed-slinger with Duet 3 Mini 5+ WiFi : RRP Fisher Delta v1 with Duet 2 Maestro : TronXY X5S with Duet 2 Wifi (in progress)

      droftarts 1 Reply Last reply Reply Quote 0
      • MikeD
        MikeD last edited by

        Thank you for the response.
        A lesson has been learned for sure.
        I have read a great deal of the documentation dealing with the Duet and Wifi Board even before I purchased one, I was aware of many things not to do like plug and unplug motors under power, even remember reading the How to destroy your duet 2 article. I never saw anything warning against moving motors plugged in.
        It does seem like that is something many take as a common sense thing, and it will be for me also in the future.
        My only other piece of hardware is a CR10S pro, that seems to be completely immune to backfeed damage, so perhaps stupidly I was not cautious enough.

        Filastruder has already denied warranty, I am not quite so sure how I feel about it. I can agree that my actions may have caused the damage, just not so sure they should have.

        Barring any warranty replacement, is there a repair service offered ?
        If not, any tips for what to look for to replace, single component wise off the board. I am assuming (hoping really) a backfeed voltage spike would damage a single surface mount component such as a diode or capacitor, i have a reflow station and other tools required for that type of repair.

        I realize that it may be hard to diagnose what it is that failed, but lets say if I commit to spending up to half the cost of a new PanelDue dollars and a few hours of work, what would be the first things one should look at replacing ?

        Mike

        A Former User 1 Reply Last reply Reply Quote 0
        • A Former User
          A Former User @MikeD last edited by A Former User

          @MikeD said in Dead PanelDue 7I:

          I realize that it may be hard to diagnose what it is that failed, but lets say if I commit to spending up to half the cost of a new PanelDue dollars and a few hours of work, what would be the first things one should look at replacing ?

          Mike

          hard to give a good written guide; but as you've already determined you cannot reprogram the board which suggest there is a problem with the atsam mcu. I'd first check the onboard 3.3v regulator, if its okay then replace the mcu.

          having done that you could still have issues with the lcd panel, so not easy to evaluate if worth while.

          edit: cant recall having seen the 7i schematic, but the regular v3 is close enough for the bits above
          https://github.com/dc42/PanelDue/raw/master/PCB/V3.0/PaneDue-3.0-schematic.png

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          • Phaedrux
            Phaedrux Moderator last edited by

            That's a tough lesson. Sorry about that. It should be fairly well known that motors are generators when driven in reverse. You saw lights coming on after all. I've seen numerous warnings to not move the motors quickly if you have to move them by hand.

            Perhaps the hint to the failure lies here:
            https://duet3d.dozuki.com/Wiki/How_to_destroy_your_Duet_2#Section_Methods_that_are_very_likely_to_write_off_your_Duet

            excessive voltage on the 3.3V rail will back-feed into the 5V rail too, so you will destroy even more chips, and with luck the backlight inverter on your TFT panel too if you have one.

            The article is a bit tongue in cheek.

            At least the board itself is still functional.

            Z-Bot CoreXY Build | Thingiverse Profile

            A Former User 1 Reply Last reply Reply Quote 0
            • Phaedrux
              Phaedrux Moderator last edited by

              https://duet3d.dozuki.com/Wiki/Warnings

              Point #4

              When the stepper motors are connected to the Duet, do not move any parts by hand that make the motors rotate rapidly! For example, if you need to move the print head by hand, or the carriages of a delta printer by hand, do it s-l-o-w-l-y. Likewise, if you need to rotate the extruder gear by hand, do it slowly. Rapid rotation of the stepper drivers will generate enough voltage to power them up in an uncontrolled fashion, and could generate enough to exceed their rated voltage.

              Z-Bot CoreXY Build | Thingiverse Profile

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              • A Former User
                A Former User @Phaedrux last edited by

                @Phaedrux said in Dead PanelDue 7I:

                The article is a bit tongue in cheek.

                the accompanying youtube video was my first encounter with anything duet3d, (incorrectly?) assumed it was some random nutjob doing a parody ... but I have since been enlightened:)

                Phaedrux 1 Reply Last reply Reply Quote 0
                • Phaedrux
                  Phaedrux Moderator @Guest last edited by

                  @bearer said in Dead PanelDue 7I:

                  random nutjob

                  Nope, it was a very specific nutjob.

                  Z-Bot CoreXY Build | Thingiverse Profile

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                  • MikeD
                    MikeD last edited by

                    Yeah, should have known better, will know better.
                    Anyways, moving on ...
                    I am not at the board at the moment, but I do remember it has some exposed copper pads that I assume are test points. Any of those for the 3.3V ?
                    What would be the easiest way to test for a blown 3.3V regulator ?

                    A Former User droftarts 2 Replies Last reply Reply Quote 1
                    • A Former User
                      A Former User @MikeD last edited by A Former User

                      @MikeD said in Dead PanelDue 7I:

                      I am not at the board at the moment, but I do remember it has some exposed copper pads that I assume are test points. Any of those for the 3.3V ?
                      What would be the easiest way to test for a blown 3.3V regulator ?

                      not sure about the test points as I haven't seen the schematic for the board.

                      measure resistance across input and outputs (without power applied), feel if it gets hot, measure the output voltage, look at the output with a scope, in increasing order of ease/reliability of the test.

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                      • droftarts
                        droftarts Moderator @MikeD last edited by

                        @MikeD this from @T3P3Tony :

                        It's possible to generate quite high voltages and backfeed them if the motors are spin manually. They become generators and the voltage is related to the rotation speed. Often this is a particular issue where gearing is involved as moving the axis s
                        Relatively slowly can lead to the motors spinning rapidly.

                        Now saying that does not directly releate to PanelDue damage unless the generated voltage caused the 5v regulator to fail shorted.

                        So check the Duet too.

                        Ian

                        Cartesian bed-slinger with Duet 3 Mini 5+ WiFi : RRP Fisher Delta v1 with Duet 2 Maestro : TronXY X5S with Duet 2 Wifi (in progress)

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                        • A Former User
                          A Former User @MikeD last edited by

                          Verified that the Duet Wifi board is outputting 4.98 volts to the panel.

                          he did ☝

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                          • Danal
                            Danal last edited by

                            If you get to the point you can make no further progress with the dead Panel assembly, there are several of us that have volunteered to look at repairs, WITH NO GUARANTEE beyond that we will send your board back worse off than we received it...! All kidding aside, we can at least try.

                            If you decide to pursue that, search for "repair" and you'll find a thread with a couple of people. I am one, I'm in North Texas USA from a shipping cost perspective. I am an amateur/hobbyist... but I do have hot air rework, O-Scopes, soldering reflow ovens (settable to certified profiles, even), etc, etc.

                            Let us know...

                            Delta / Kossel printer fanatic

                            MikeD 1 Reply Last reply Reply Quote 0
                            • MikeD
                              MikeD @Danal last edited by

                              @Danal

                              I am definitely interested.
                              Short of waiting for the fairy to make it all better I am out of recourses. I have been able to verify that at least one regulator is supplying 3.3 volts, there is another one furthers stepping it down to 1.something. But that's about it.

                              A Former User 1 Reply Last reply Reply Quote 0
                              • A Former User
                                A Former User @MikeD last edited by

                                @MikeD said in Dead PanelDue 7I:

                                I have been able to verify that at least one regulator is supplying 3.3 volts, there is another one furthers stepping it down to 1.something. But that's about it.

                                The micocontroller that is refusing to give you a serial port only needs 3.3v. 1.8v would be for the lcd controller but would need a working microcontroller to evaluate it if also needs fixing.

                                MikeD 1 Reply Last reply Reply Quote 0
                                • MikeD
                                  MikeD @Guest last edited by

                                  @bearer

                                  Yeah, based on not much more than a gut feeling I think it is going to be one of the micro controllers on the board.

                                  1 Reply Last reply Reply Quote 0
                                  • dc42
                                    dc42 administrators last edited by

                                    If the PanelDue won't show up as the Bossa port after you have done all the usual things, then it sounds that either the ATSAM4S4B processor has failed, or the USB port isn't making contact, or there is no +3.3V supply to the ATSAM processor.

                                    The 3.3V supply comes from U4. There should be +3.3V on the end of CA9 closest to the ATSAM processor UA1. The case of the SD card socket can be used as ground when measuring this. There should be 1.2V on LA2. The ATSAM should not be getting hot.

                                    The flashing from the display sounds odd, almost as though the backlight inverter has failed or there is a poor power contact. Are you sure that the backlight is on continuously? Even with the screen dark, I can see it at the edge of the display where the Kapton cables come out of it.

                                    Duet WiFi hardware designer and firmware engineer
                                    Please do not ask me for Duet support via PM or email, use the forum
                                    http://www.escher3d.com, https://miscsolutions.wordpress.com

                                    MikeD 1 Reply Last reply Reply Quote 1
                                    • MikeD
                                      MikeD last edited by

                                      I suppose I could try a few more different cables, have been using the one that came with the Duet Wifi boards.
                                      Not really sure how to fully eliminate the USB port not making contact possibility. Plugging usb in does turn on the backlight, so at least GND, and 5V are getting through.

                                      I will verify again the correct voltages later today. I was able to measure +3.3V yesterday in the spot I think you care referring to.

                                      Did also measure 1.X voltage on a regulator, I forgot the exact number, will confirm later also.

                                      Perhaps I described flashing incorrectly:
                                      The backlight is on, always on, cant make it go off even with pressing erase for 1 second followed by reset.
                                      What does, or did initially flash, is the screen itself. Every so often, I would say a 40 second average you would get a quick blip of the screen, kind of like the initial very short white illumination I normally get when powering on, just before the logo displays. Almost as if periodically the unit is trying to boot.

                                      Ironically, I had a similar situation when I initially purchased the screen, before there were any motors or much else hooked up to it. When i was just familiarizing myself with the Duet Wifi and PanelDue I had just those two hooked together.
                                      I was using the 10 pin ribbon cable at the time. Initially I had it hooked to the correct port via the ribbon cable, it came on and life was great.
                                      Throughout the build process at one point I powered on an the screen did not boot. I believe that I had the 10 pin ribbon cable in the wrong port. Powered down, switched to the right port, and I think all was back to normal. Hard to remember, but what I do know is that it did not always boot the screen after that. Sometimes I had to boot a number of times, and I think I am correct in saying that sometimes the screen would boot after being powered for a while. Either way, that is when I initially got familiar with the process of flashing the firmware, bossa etc.
                                      Was able to follow the guides, usb port came up at that time just as it should have, flashed without issue, booted without issue, switched over to 4 pin wire only since ribbon wasn't long enough to reach my desired location.
                                      I put it in its case, and haven't touched it since. Have had no issues for the last 2 months, probably powered down and booted up 30 times since then.
                                      About 2 weeks ago I did have an issue with the screen, or entire system rather going idle during a print. Screen would show IDLE on the corner while machine was still printing.
                                      I originally thought it was on long prints, what would happen is that the screen would essentially stop getting new information, layer number would stop updating, etc.
                                      The machine continued on, and the prints finished as expected. I do not know if pressing the stop button on the screen would have done anything at this point.
                                      During this time the web interface could not connect either, I believe wifi was going idle.
                                      Reboot would fix everything.
                                      At the same time I was also having issues with Fusion 360 taking forever to launch, so I think all of it was really an issue caused by my router. Once I powered cycled it all was better, no more disconnection issues.
                                      Don't know if much of that is helpful or not.
                                      I was surprised that even if it is due to the router and wifi disconnecting that the screen would stop getting information and go idle.
                                      So maybe there were some underlying issues, perhaps from once plugging the 10 pin ribbon into the wrong port.
                                      Once i get my new screen I will be curious to see what happens if I turn off wifi router mid print.

                                      Mike

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                                      • dc42
                                        dc42 administrators last edited by dc42

                                        Yes, try more USB cables. Some micro USB cables carry power only, not data. Also, connect the USB cable to a PC, not a laptop, because some laptops can't provide enough power. [But if you are getting 3.3V then it should be OK.]

                                        If you haven't already, disconnect the 4-pin cable to the Duet while you are using the USB port.

                                        Duet WiFi hardware designer and firmware engineer
                                        Please do not ask me for Duet support via PM or email, use the forum
                                        http://www.escher3d.com, https://miscsolutions.wordpress.com

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                                        • MikeD
                                          MikeD last edited by

                                          Will do.
                                          I have brand new in the box Duet Wifi for the next project, the current cable I am using came out of that box to eliminate the possibility of of a bad cable.

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                                          • Danal
                                            Danal last edited by

                                            I am going to hijack this for about two seconds to say what a remarkable person @dc42 is:

                                            He possess a combination of energy, enthusiasm, patience, technical expertise, and just plain helpfulness that is quite rare. The detailed posts about chips and traces on the board, all to help a single person with a product that's already been replaced, that is what brought all of this to mind; this forum is full of other examples.

                                            Thanks from the entire community, Dave!

                                            Back to your regularly scheduled programming...

                                            Delta / Kossel printer fanatic

                                            1 Reply Last reply Reply Quote 2
                                            • MikeD
                                              MikeD @dc42 last edited by

                                              @dc42
                                              Tried other cables, no difference.
                                              Verified cable functionality by plugging up to an old Tom Tom, detected right away, so comms are goood.

                                              U4 is putting out 3.26 V.

                                              CA9 does have 3.26 at the end specified.

                                              Either end of LA2 does show 1.19 V.

                                              Nothing is getting hot.

                                              Replacing the Atsam looks to be within my skilset, provided I can get one and it doesnt need extra programming with tools I may not have.
                                              Digikey shows a few in stock, not sure if they would be exact matches.
                                              https://www.digikey.com/products/en?keywords= ATSAM4S4B-AU

                                              A Former User dc42 2 Replies Last reply Reply Quote 0
                                              • A Former User
                                                A Former User @MikeD last edited by A Former User

                                                @MikeD said in Dead PanelDue 7I:

                                                https://www.digikey.com/products/en?keywords=ATSAM4S4B-AU

                                                those are all the same part, just different packaging. in practice you can only order the cut tape one in small qty. (but i think you want the lqfp footprint?)
                                                (something weird with that search link, this ought be the correct part ?)

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                                                • Danal
                                                  Danal last edited by

                                                  @MikeD said in Dead PanelDue 7I:

                                                  it doesnt need extra programming with tools I may not have.

                                                  The bootloader on that chip series is in ROM, so it should be BOSSA-able with no pre-programming on your part.

                                                  Delta / Kossel printer fanatic

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                                                  • dc42
                                                    dc42 administrators @MikeD last edited by

                                                    @MikeD said in Dead PanelDue 7I:

                                                    @dc42
                                                    Tried other cables, no difference.
                                                    Verified cable functionality by plugging up to an old Tom Tom, detected right away, so comms are goood.

                                                    U4 is putting out 3.26 V.

                                                    CA9 does have 3.26 at the end specified.

                                                    Either end of LA2 does show 1.19 V.

                                                    Nothing is getting hot.

                                                    Replacing the Atsam looks to be within my skilset, provided I can get one and it doesnt need extra programming with tools I may not have.
                                                    Digikey shows a few in stock, not sure if they would be exact matches.
                                                    https://www.digikey.com/products/en?keywords= ATSAM4S4B-AU

                                                    Yes that's the correct part.

                                                    Duet WiFi hardware designer and firmware engineer
                                                    Please do not ask me for Duet support via PM or email, use the forum
                                                    http://www.escher3d.com, https://miscsolutions.wordpress.com

                                                    A Former User 1 Reply Last reply Reply Quote 0
                                                    • A Former User
                                                      A Former User @dc42 last edited by A Former User

                                                      @dc42 said in Dead PanelDue 7I:

                                                      Yes that's the correct part.

                                                      did you click the link or just read the url?

                                                      maybe its just on my system it shows the -UU bga version?
                                                      (no i think digi key is discarding the - and the new part number indicate rev A giving hits for BA-UU instead of B-AU? and he should look for BA-AU)

                                                      b18613aa-0ec9-4d39-9b2d-647f00c3ed1b-image.png

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