Duet3D Logo Duet3D
    • Tags
    • Documentation
    • Order
    • Register
    • Login

    CONSTANT AJAX disconnect errors

    Scheduled Pinned Locked Moved
    General Discussion
    28
    307
    55.0k
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • T3P3Tonyundefined
      T3P3Tony administrators
      last edited by

      Keegan is there a correlation between USB cable plugged in and stability of the connection?

      www.duet3d.com

      1 Reply Last reply Reply Quote 0
      • KeeganBundefined
        KeeganB
        last edited by

        @T3P3Tony:

        Keegan is there a correlation between USB cable plugged in and stability of the connection?

        I really have no idea. It was a theory I was testing. After a couple days of disconnects I noticed my first successful 4hr print with 6hr connection time was when I was also plugged in to USB. Then the next day I tried it without the USB and got nearly an immediate disconnect. Then about an hour later the same DWC window in Safari had reconnected on its own?! It's been working and connected since then for nearly 10 hours. (No usb)

        Artemis
        Rostock Max v2
        Orion

        1 Reply Last reply Reply Quote 0
        • KeeganBundefined
          KeeganB
          last edited by

          The last two failures both happened within minutes of starting a print. I didn't get the diags for the first failure, but interestingly enough it came back online by itself and worked fine until a few seconds after starting the second print. Here is the M122 after the second print and subsequent AJAX failure. I suspect this will come back online again too, sometime in the middle of the print.

          M122
          SENDING:M122
          === Diagnostics ===
          Used output buffers: 5 of 32 (13 max)
          === Platform ===
          RepRapFirmware for Duet WiFi version 1.19.2 running on Duet WiFi 1.0
          Board ID: 08DDM-9FAM2-LW4SD-6JTF0-3S86N-TLWZX
          Static ram used: 21176
          Dynamic ram used: 96280
          Recycled dynamic ram: 1328
          Stack ram used: 4048 current, 9104 maximum
          Never used ram: 3184
          Last reset 04:50:44 ago, cause: power up
          Last software reset reason: User, spinning module GCodes, available RAM 4348 bytes (slot 0)
          Software reset code 0x0003, HFSR 0x00000000, CFSR 0x00000000, ICSR 0x00400000, BFAR 0xe000ed38, SP 0xffffffff
          Error status: 8
          [ERROR] Error status: 8

          Free file entries: 9
          SD card 0 detected, interface speed: 20.0MBytes/sec
          SD card longest block write time: 0.0ms
          MCU temperature: min 35.7, current 35.9, max 36.2
          Supply voltage: min 11.7, current 11.8, max 12.1, under voltage events: 0, over voltage events: 0
          Driver 0: stalled
          Driver 1: stalled
          Driver 2: stalled
          Driver 3: stalled
          Driver 4: standstill
          Date/time: 2017-09-16 20:04:42
          Slowest main loop (seconds): 0.003906; fastest: 0.000000
          === Move ===
          MaxReps: 4, StepErrors: 0, FreeDm: 221, MinFreeDm 189, MaxWait: 2ms, Underruns: 0, 0
          Scheduled moves: 2311, completed moves: 2306
          Bed compensation in use: none
          Bed probe heights: -0.019 -0.083 -0.078 0.096 -0.127
          === Heat ===
          Bed heater = 0, chamber heater = -1
          Heater 0 is on, I-accum = 0.3
          Heater 1 is on, I-accum = 0.4
          === GCodes ===
          Segments left: 1
          Stack records: 2 allocated, 0 in use
          Movement lock held by file
          http is idle in state(s) 0
          telnet is idle in state(s) 0
          file is doing "G1 X25.168 Y2.626 E93.1502" in state(s) 0
          serial is ready with "M122" in state(s) 0
          aux is idle in state(s) 0
          daemon is idle in state(s) 0
          queue is idle in state(s) 0
          autopause is idle in state(s) 0
          Code queue is empty.
          Network state is running
          WiFi module is connected to access point
          WiFi firmware version 1.19.2
          WiFi MAC address 5c:cf:7f:ef:51:6f
          WiFi Vcc 3.11, reset reason Turned on by main processor
          WiFi flash size 4194304, free heap 39392
          WiFi IP address 10.0.1.38
          WiFi signal strength -46dBm
          Reconnections 1
          HTTP sessions: 2 of 8
          Socket states: 0 0 0 0 0 0 0 0
          Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)

          Artemis
          Rostock Max v2
          Orion

          1 Reply Last reply Reply Quote 0
          • dc42undefined
            dc42 administrators
            last edited by

            Thanks. I can't see anything wrong in the M122 report. it's interesting that you have a a reconnection count of 1 indicating that the WiFi module became disconnected from the router and successfully connected again, even though you have a very high signal strength.

            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

            1 Reply Last reply Reply Quote 0
            • KeeganBundefined
              KeeganB
              last edited by

              David,

              I think I have established a bit of a pattern in my situation. It seems that right at the beginning of every new print, it disconnects. Then sometime after that (I estimate between 15-30mins) it just reconnects itself and is fine from then until I start the next print.

              Artemis
              Rostock Max v2
              Orion

              1 Reply Last reply Reply Quote 0
              • dc42undefined
                dc42 administrators
                last edited by

                I did a little investigation this morning, and I found that for homing moves (i.e. G1 S1 moves), the maximum step rate possible is many times lower than for ordinary moves. So a high microstepping value can cause MaxReps to get very high during a homing move even if the combination of M350 microstepping and M203 maximum speeds is OK for normal moves. So if your print files have a G28 homing command at the start, that could be why you get a disconnection at the start of a print. The workaround for this particular issue is to use slower homing moves.

                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

                1 Reply Last reply Reply Quote 0
                • KeeganBundefined
                  KeeganB
                  last edited by

                  I will try slower homing moves. I don't have a separate G28 at the start of my prints, but there is on inside of beg.g that runs (as G32) at the start of all prints.

                  My micro stepping is 16x

                  I should add though, that it doesn't necessarily disconnect during the homing move, sometimes it can be a few minutes into the print.

                  Artemis
                  Rostock Max v2
                  Orion

                  1 Reply Last reply Reply Quote 0
                  • dc42undefined
                    dc42 administrators
                    last edited by

                    I would not expect you to have this problem with only x16 microstepping.

                    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

                    1 Reply Last reply Reply Quote 0
                    • Jareryundefined
                      Jarery
                      last edited by

                      Similar to KeeganB, my board is set to 16x micro stepping (with interpolation).
                      I also do not have a G28 homing in any of my Gcode but as KeeganB states in my Bed command is a G28 at the start. After that the Gcode has no homing until finished.

                      My disconnects happen early in a print but unlike KeeganB, mine has never reconnected on its own that I'm aware of.
                      I have never seen the reconnect count above 0.
                      Edit: mine don't always happen only near start of a print, just that they are a high chance at start. Mine also disconnects just sitting idle sometime.

                      I'm about a week away from commissioning a second delta with another duet wifi, based on dc42's large Kossel build. So in a week or so I'll be able to tell if both boards exhibit the same behaviour in my wifi network or if its specific to the one board.

                      1 Reply Last reply Reply Quote 0
                      • lolorcundefined
                        lolorc
                        last edited by

                        Hi there.

                        I also have the constant disconnections.
                        the disconnections also happen when the printer is idle…

                        I also have a tons of issue uploading g-code files through wifi. (when usb is plugged)

                        1 Reply Last reply Reply Quote 0
                        • BlackTomundefined
                          BlackTom
                          last edited by

                          I have had the same kind of issue with 1.19.2, 1.19 is correct.

                          I had issues when I was running my bed compensation routine and I had it too when I was printing,
                          I always finish by being disconnected of the web interface when I print and I cannot reconnect to it.

                          The print continue without issue until it's done so it doesn't affect it

                          The only way to get back access to the web interface is by powering off / on the board,

                          1 Reply Last reply Reply Quote 0
                          • lolorcundefined
                            lolorc
                            last edited by

                            @bloood3d:

                            The only way to get back access to the web interface is by powering off / on the board,

                            same here.

                            1 Reply Last reply Reply Quote 0
                            • botundefined
                              bot
                              last edited by

                              What about when you do a "hard refresh" of the web page through the web browser? On chrome this is done by holding the CTRL key while clicking refresh. In the past, this has helped me get back into a web interface session.

                              *not actually a robot

                              1 Reply Last reply Reply Quote 0
                              • KeeganBundefined
                                KeeganB
                                last edited by

                                bot,

                                That hasn't worked for me. I have also tried loading the page on difference devices.

                                Artemis
                                Rostock Max v2
                                Orion

                                1 Reply Last reply Reply Quote 0
                                • RGN01undefined
                                  RGN01
                                  last edited by

                                  I'm commissioning my new Duet WiFi and have the same issue. I've tried it in two locations (both no more than 10 feet from the WiFi router) and with three clients (desktop PC, Android tablet and Android mobile phone all running Chrome). The desktop PC is best but it still drops the connection frequently - perhaps every 15 minutes - despite the printer not even being fully commissioned (the most it has done is home the towers and heatbed auto set up) and the PC is being used for browsing and email.

                                  I hope that this is resolved as it is a bit concerning to someone new to the Duet (which I think is absolutely great!)

                                  1 Reply Last reply Reply Quote 0
                                  • dc42undefined
                                    dc42 administrators
                                    last edited by

                                    Have you tried increasing the number of retries in the DWC settings?

                                    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

                                    1 Reply Last reply Reply Quote 0
                                    • RGN01undefined
                                      RGN01
                                      last edited by

                                      Thanks, David.

                                      I increased it to 5 earlier this evening and it seems to be OK so far on the desktop PC (about 90 minutes) - but the printer and PC are effectively idle.

                                      It was set to one initially, is there a recommended larger setting, or is it trial and error?

                                      I'll monitor this as I start adding and testing functionality to the printer - and report back.

                                      1 Reply Last reply Reply Quote 0
                                      • dc42undefined
                                        dc42 administrators
                                        last edited by

                                        1 is rather low, I think 3 would be a better default.

                                        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

                                        1 Reply Last reply Reply Quote 0
                                        • KeeganBundefined
                                          KeeganB
                                          last edited by

                                          At this point I can confidently say mine fits the pattern I mentioned earlier. Every print it starts fine and after a few minutes it disconnects. After probably 30 mins or so, it reconnects without issue and stays connected until I start the next new print.

                                          David, I am considering downgrading to 1.19. Is there any reason not to?

                                          Artemis
                                          Rostock Max v2
                                          Orion

                                          1 Reply Last reply Reply Quote 0
                                          • Jareryundefined
                                            Jarery
                                            last edited by

                                            Interesting yours reconnects. Mine never has, retries I've changed to 5, 10, to no effect.

                                            1 Reply Last reply Reply Quote 0
                                            • First post
                                              Last post
                                            Unless otherwise noted, all forum content is licensed under CC-BY-SA