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Duet Maestro Freefall

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  • undefined
    fcwilt @LeonMF
    last edited by 28 Aug 2018, 22:05

    @leonmf said in Duet Maestro Freefall:

    I can post a picture later if you still want one.

    Thanks much. That is a large and pricey printer. I guess for that kind of money that can provide a low friction setup.

    My FT5 moves smoothly but it slowly sinks down without crashing.

    Frederick

    Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

    1 Reply Last reply Reply Quote 0
    • undefined
      LeonMF
      last edited by 28 Aug 2018, 22:09

      I hope this printer becomes a solid workhorse but, I'm afraid, it is still more of a beta solution and this particular problem is one of the more vexing ones!

      Current: Railcore II ZLT w/Duet 3 and Hemera hot end.
      Retired: Robo3D R1,BI V2.5 Delta updated to BerryBot magnets, bespoke carriages and Duet Ethernet, M3D Promega;

      1 Reply Last reply Reply Quote 0
      • undefined
        LeonMF
        last edited by 29 Aug 2018, 01:02

        Here are some videos highlighting the issue:

        Duet Power off free-fall:
        https://youtu.be/WCvHGXi6jxs

        Duet Power On Free-Fall
        https://youtu.be/7uG-6czPOVY

        Duet Bed Stall crash
        https://youtu.be/QH9c-w1Nbgg

        Current: Railcore II ZLT w/Duet 3 and Hemera hot end.
        Retired: Robo3D R1,BI V2.5 Delta updated to BerryBot magnets, bespoke carriages and Duet Ethernet, M3D Promega;

        undefined undefined undefined 3 Replies Last reply 29 Aug 2018, 07:10 Reply Quote 1
        • undefined
          mrehorstdmd
          last edited by 29 Aug 2018, 02:11

          Wow! I'd say something needs to be done about that.......

          https://drmrehorst.blogspot.com/

          1 Reply Last reply Reply Quote 0
          • undefined
            deckingman @LeonMF
            last edited by deckingman 29 Aug 2018, 07:10

            @leonmf OK. So what seems to be happening is that the bed is being driven in minus Z because those moves are very much faster than gravity with no power. So if it's being driven, then there must be something in your files telling it to move to Znnn at a feedrate (speed) of Fnnn. Might be an idea to post your home Z file, or at least take a look at it and see what is being commanded after the probe or stall detection or whatever method you use to home, has been triggered.

            Edit. And/or you have the steps per mm for Z set wildly wrong.

            Ian
            https://somei3deas.wordpress.com/
            https://www.youtube.com/@deckingman

            1 Reply Last reply Reply Quote 1
            • undefined
              wilriker @LeonMF
              last edited by 29 Aug 2018, 08:14

              @leonmf For one @deckingman is right, the last one is definitely driven by the motor. You can even hear the high pitched sound of the motor running at a very high speed. Please post homez.g, homeall.g and maybe also your config.g.

              Manuel
              Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
              with probably always latest firmware/DWC (incl. betas or self-compiled)
              My Tool Collection

              undefined 1 Reply Last reply 29 Aug 2018, 08:36 Reply Quote 0
              • undefined
                deckingman @wilriker
                last edited by 29 Aug 2018, 08:36

                @wilriker said in Duet Maestro Freefall:

                @leonmf For one @deckingman is right, ...................

                Manuel, mind if I correct your translation? That sounds a bit like "For once deckingman is right" To a native English speaker, that means the person is usually wrong but on this occasion was right. Now of course, you might have meant that I'm usually wrong, in which case no correction is needed 😉

                Ian
                https://somei3deas.wordpress.com/
                https://www.youtube.com/@deckingman

                undefined 1 Reply Last reply 29 Aug 2018, 08:57 Reply Quote 0
                • undefined
                  wilriker @deckingman
                  last edited by 29 Aug 2018, 08:57

                  @deckingman said in Duet Maestro Freefall:

                  Manuel, mind if I correct your translation? That sounds a bit like "For once deckingman is right" To a native English speaker, that means the person is usually wrong but on this occasion was right. Now of course, you might have meant that I'm usually wrong, in which case no correction is needed 😉

                  Thanks and I never mind being corrected! 🙂 Also I definitely did not want to say that you are usually wrong because I know better. 😂 (And I don't mean I know better not to say it but I know better that this would not be true).

                  But one thing I wonder now: I wrote "For one" and wanted to say "First of all" whereas you corrected "For on_c_e" (which I would have known to have the meaning to described). So would my wording have expressed what I wanted to say?

                  Manuel
                  Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
                  with probably always latest firmware/DWC (incl. betas or self-compiled)
                  My Tool Collection

                  undefined 1 Reply Last reply 29 Aug 2018, 10:06 Reply Quote 0
                  • undefined
                    dc42 administrators
                    last edited by 29 Aug 2018, 09:01

                    I agree, the motor is definitely driving the bed down.

                    Is the printer definitely being controlled by a Duet Maestro? I believe M3D used other Duets in early machines, before the Maestro became available. So I am wondering whether your machine is running a Duet 2 Ethernet and the stall detection is configured to do something silly.

                    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
                    • undefined
                      deckingman @wilriker
                      last edited by 29 Aug 2018, 10:06

                      @wilriker said in Duet Maestro Freefall:

                      But one thing I wonder now: I wrote "For one" and wanted to say "First of all" whereas you corrected "For on_c_e" (which I would have known to have the meaning to described). So would my wording have expressed what I wanted to say?

                      Yes, you did say "for one" but it's not a common or normal expression. So the meaning of what you wrote was clear but it's an unusual thing to say. Hence it could easily be misinterpreted as a typo and the actual meaning was something else. Whilst I always enjoy these little chats, this probably isn't the time or place to discuss the finer points of English grammar. ☺

                      Ian
                      https://somei3deas.wordpress.com/
                      https://www.youtube.com/@deckingman

                      undefined 1 Reply Last reply 29 Aug 2018, 10:16 Reply Quote 0
                      • undefined
                        wilriker @deckingman
                        last edited by 29 Aug 2018, 10:16

                        @deckingman said in Duet Maestro Freefall:

                        Whilst I always enjoy these little chats, this probably isn't the time or place to discuss the finer points of English grammar. ☺

                        You are right and we should put a stop to hijacking this thread. 😉 Thanks for clarification, though.

                        Manuel
                        Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
                        with probably always latest firmware/DWC (incl. betas or self-compiled)
                        My Tool Collection

                        1 Reply Last reply Reply Quote 0
                        • undefined
                          LeonMF
                          last edited by 29 Aug 2018, 12:07

                          @dc42 This is definitely a Duet Maestro. I can post a board picture later if you want confirmation.

                          Firmware Name: RepRapFirmware for Duet 2 Maestro
                          Firmware Electronics: Duet Maestro 1.0
                          Firmware Version: 2.01beta1(RTOS) (2018-06-23b1)
                          Web Interface Version: 1.22.1

                          Here is my current config:

                          https://www.dropbox.com/s/aeppocjnft4zg4q/Promega Config.zip?dl=0

                          I looked for an a M915 command in the files but found nothing, Typing M915 into the gcode console says not supported. Is there something else I should be looking at?

                          Current: Railcore II ZLT w/Duet 3 and Hemera hot end.
                          Retired: Robo3D R1,BI V2.5 Delta updated to BerryBot magnets, bespoke carriages and Duet Ethernet, M3D Promega;

                          1 Reply Last reply Reply Quote 0
                          • undefined
                            Dougal1957
                            last edited by 29 Aug 2018, 12:25

                            Could this by due to the fact that you have Deploy/retractprobe files in the sys directory there was a note on one of the firmware updates to remove them as they caused issues?

                            1 Reply Last reply Reply Quote 0
                            • undefined
                              wilriker
                              last edited by 29 Aug 2018, 12:30

                              What confuses me more is that on the one hand the config defines

                              M574 X2 Y2 Z2 S0 ; Set xy end-stops types (S0 is active low, applied to XY)
                              

                              a Z-max switch as an endstop in machine_endstoptypes.g and then also

                              M574 X2 Y2 Z2 S0 ; Set xy end-stops types (S0 is active low, applied to XY)
                              

                              a switch-based Z-probe in machine-zprobe.g.

                              Additionally at the start of homez.g there is

                              ; Ignore Machine boundaries
                              M564 H0 S0

                              and I am not sure how this influences the latter

                              ; Rapid Z until limit switch triggers
                              G0 Z450 F1500 S1

                              in the same file.


                              So @LeonMF can you give some more information on what your endstop for Z actually is?

                              Manuel
                              Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
                              with probably always latest firmware/DWC (incl. betas or self-compiled)
                              My Tool Collection

                              undefined 1 Reply Last reply 29 Aug 2018, 13:13 Reply Quote 0
                              • undefined
                                Dougal1957
                                last edited by 29 Aug 2018, 12:37

                                The way the config has been written with all those called macros is very confusing that's for sure it seems to be very over complicated

                                undefined undefined 2 Replies Last reply 29 Aug 2018, 12:39 Reply Quote 0
                                • undefined
                                  wilriker @Dougal1957
                                  last edited by 29 Aug 2018, 12:39

                                  @dougal1957 said in Duet Maestro Freefall:

                                  The way the config has been written with all those called macros is very confusing that's for sure it seems to be very over complicated

                                  Hehe, I was in the process of changing my config to the same style a couple of days ago until I realized that this will make it less readable then before and reverted everything back. 😁

                                  Manuel
                                  Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
                                  with probably always latest firmware/DWC (incl. betas or self-compiled)
                                  My Tool Collection

                                  1 Reply Last reply Reply Quote 0
                                  • undefined
                                    LeonMF @Dougal1957
                                    last edited by 29 Aug 2018, 13:08

                                    @dougal1957 I'm with you. That's the way it came from M3D and I haven't taken the steps to merge them yet. I see what they were trying for but I don't think they realize how painful it is to dig through!

                                    Current: Railcore II ZLT w/Duet 3 and Hemera hot end.
                                    Retired: Robo3D R1,BI V2.5 Delta updated to BerryBot magnets, bespoke carriages and Duet Ethernet, M3D Promega;

                                    1 Reply Last reply Reply Quote 0
                                    • undefined
                                      LeonMF @wilriker
                                      last edited by 29 Aug 2018, 13:13

                                      @wilriker The system has a max travel Z-endstop at the bottom of Z travel used for homing. There is also a manually deployed limit switch probe and an IR probe attached to the hot end. The deployable probe and the IR probe are either/or changed in one of the files.

                                      @Dougal1957 I don't know about the deploy/retract files. The system can't use them and they are in the M3D default image. They left Homedelta, too and I'm pretty sure that's not needed. 🙂

                                      Current: Railcore II ZLT w/Duet 3 and Hemera hot end.
                                      Retired: Robo3D R1,BI V2.5 Delta updated to BerryBot magnets, bespoke carriages and Duet Ethernet, M3D Promega;

                                      undefined 1 Reply Last reply 29 Aug 2018, 13:15 Reply Quote 0
                                      • undefined
                                        wilriker @LeonMF
                                        last edited by 29 Aug 2018, 13:15

                                        @leonmf said in Duet Maestro Freefall:

                                        @wilriker The system has a max travel Z-endstop at the bottom of Z travel used for homing. There is also a manually deployed limit switch probe and an IR probe attached to the hot end. The deployable probe and the IR probe are either/or changed in one of the files.

                                        OK, I see.
                                        So what exactly are you doing to get this horrible bed race towards the bottom effect? Is it homing Z or bed leveling?

                                        I don't know about the deploy/retract files.

                                        They are empty anyway.

                                        Manuel
                                        Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
                                        with probably always latest firmware/DWC (incl. betas or self-compiled)
                                        My Tool Collection

                                        undefined 1 Reply Last reply 29 Aug 2018, 13:34 Reply Quote 0
                                        • undefined
                                          LeonMF @wilriker
                                          last edited by 29 Aug 2018, 13:34

                                          @wilriker The bed crash is caused when the z is driven into an immovable object like the hot end and stalls out. This is, presumably, triggering a fault of some sort and the user theory on the M3D discord is that a mosfet disconnects the motor connection and lets it freewheel.

                                          I'm not electrically savvy enough to know if this is what's going on. I'm pretty good with config files but when we get into esoteric electrical properties I get lost!

                                          Current: Railcore II ZLT w/Duet 3 and Hemera hot end.
                                          Retired: Robo3D R1,BI V2.5 Delta updated to BerryBot magnets, bespoke carriages and Duet Ethernet, M3D Promega;

                                          undefined undefined 2 Replies Last reply 29 Aug 2018, 14:11 Reply Quote 0
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