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Dumbfounded ! Firmware bug in 3.4 beta 6?

Scheduled Pinned Locked Moved Solved
Beta Firmware
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  • undefined
    T3P3Tony administrators @GeneRisi
    last edited by 1 Dec 2021, 13:21

    @generisi said in Dumbfounded ! Firmware bug in 3.4 beta 6?:

    G29 Q1

    G29 Q2

    These are wrong - Should be G29 S1/S2 - although i don't think that's the cause of the issue.

    I assume you now have :

    G1 R2 X0 Y0 Z2
    G1 R2 Z0

    at the end of all the tpost#.g files?

    @generisi said in Dumbfounded ! Firmware bug in 3.4 beta 6?:

    two sequences worked T0, T1 and T3,T0. T1,T0 does not work as expected.

    can i check T0 -> T1 works but T1 -> T0 does not work? What if you just command the tool changes through the console sending:
    T-1
    T0
    G1 X100 Y100 Z0
    T1
    G1 X100 Y100 Z0
    T0
    G1 X100 Y100 Z0
    ..etc

    repeatedly does the pickup point or the position X100 Y100 Z0 differ between the tools?

    www.duet3d.com

    undefined 1 Reply Last reply 1 Dec 2021, 13:50 Reply Quote 0
    • undefined
      GeneRisi @T3P3Tony
      last edited by GeneRisi 12 Jan 2021, 13:53 1 Dec 2021, 13:50

      @t3p3tony Hi Tony - I have my own "mesh.g" macro that allows me to also use "Q1" and "Q2" as inputs. I use the macro to check that the bed mesh in use has been created after the most recent system reset and is not being used if it was created some time before the most recent reset.

      ; mesh.g
      ;
      ; Redefining G29 behavior
      ; New parameter Q is used as a substitute for S so that this macro is called
      ; no parms or Q0 means probe mesh, save it but don't load it now
      ; Q1 means use mesh compensation if is fresh
      ; Q2 means disable mesh compensation
      ; global.freshMesh set to false in config.g
      ;
      var qVal = 0
      if exists(param.Q)
      set var.qVal = param.Q
      if var.qVal = 0
      if !move.axes[0].homed | !move.axes[1].homed | !move.axes[2].homed
      abort "Home all axes before running mesh probes"
      else
      G91;
      G1 Z5 F500
      G90;
      G29 S2 ; make sure mesh compensations is off
      G1 X150 Y100 F3000
      G30 ; get fresh Z=0 for current conditions
      set global.freshMesh = true
      elif var.qVal = 1 & global.freshMesh = false
      abort "Trying to use old height map, that's not ok right now"
      ;
      echo "G29 S", {var.qVal}
      G29 S{var.qVal}
      ;
      if var.qVal = 0
      G29 S2 ; disable mesh compensation for now if no parms or mesh probed and saved
      ;
      ; finis

      Also, is there a reason why you did not combine the two "G1 R2 ..." commands into a single command?

      I will try your suggestion. Thanks!

      undefined undefined 2 Replies Last reply 1 Dec 2021, 14:32 Reply Quote 0
      • undefined
        T3P3Tony administrators @GeneRisi
        last edited by 1 Dec 2021, 14:32

        @generisi said in Dumbfounded ! Firmware bug in 3.4 beta 6?:

        I have my own "mesh.g" macro that allows me to also use "Q1" and "Q2" as inputs. I use the macro to check that the bed mesh in use has been created after the most recent system reset and is not being used if it was created some time before the most recent reset.

        ok i did not realise that - nice use case!

        @generisi said in Dumbfounded ! Firmware bug in 3.4 beta 6?:

        is there a reason why you did not combine the two "G1 R2 ..." commands into a single command?

        restoring it in the way I showed, with some Z lift first, is what we recommend for most use cases as it means the last axis to move into position will be Z, so there is less change of the tool dragging across the top of the print as the position is restored.

        www.duet3d.com

        1 Reply Last reply Reply Quote 0
        • undefined
          GeneRisi @GeneRisi
          last edited by 1 Dec 2021, 14:34

          @generisi There are either 2 or 3 contact spots checked very unscientifically with double stick tape on the bed when alternating T1, T0, T1, T0, ...
          Inked20211201_092323_LI.jpg

          1 Reply Last reply Reply Quote 0
          • undefined
            GeneRisi
            last edited by 1 Dec 2021, 16:08

            @t3p3tony Here is a simple print file that demonstrates T1,T0,T1,T0:

            G90
            M83
            M117 Preheat & Level
            G28
            G10 P0 S242 R200; set extruder 0 active and standby temps
            G10 P1 S242 R200; set extruder 1 active and standby temps
            M190 S85 ; wait for bed temperature
            ;mesh gcode
            G29 Q0
            T1
            G1 E-0.8000 F3000
            ; feature skirt
            ; tool H0.200 W0.400
            G1 Z0.200 F360
            G1 X145.575 Y112.700 F9000
            G1 E0.8000 F3000
            G1 X139.600 Y106.725 E0.2810 F90
            G1 X137.300 Y104.425 E0.1082
            G1 X137.300 Y95.575 E0.2944
            G1 X145.575 Y87.300 E0.3892
            G1 X154.425 Y87.300 E0.2944
            G1 X156.725 Y89.600 E0.1082
            G1 X162.700 Y95.575 E0.2810
            G1 X162.700 Y104.425 E0.2944
            G1 X154.425 Y112.700 E0.3892
            G1 X145.575 Y112.700 E0.2944
            G1 E-0.8000 F3000
            ; feature cross - external single extrusion
            ; tool H0.200 W0.400
            G1 Z0.400 F360
            G1 X147.738 Y100.000 F9000
            G1 Z0.200 F360
            G1 E0.8000 F3000
            G1 X149.641 Y100.000 E0.0633 F45
            G1 X150.000 Y99.641 F9000
            G1 X150.000 Y97.738 E0.0633 F45
            G1 E-0.8000 F3000
            G1 Z0.400 F360
            G1 X152.262 Y100.000 F9000
            G1 Z0.200 F360
            G1 E0.8000 F3000
            G1 X150.279 Y100.000 E0.0659 F45
            G1 X150.200 Y100.000 E0.0026
            ; tool H0.200 W0.416
            G1 X150.117 Y100.000 E0.0029
            ; tool H0.200 W0.499
            G1 X150.000 Y100.000 E0.0049
            G1 X150.000 Y100.117 E0.0049
            ; tool H0.200 W0.416
            G1 X150.000 Y100.200 E0.0029
            ; tool H0.200 W0.400
            G1 X150.000 Y100.279 E0.0026
            G1 X150.000 Y102.262 E0.0659
            G1 E-0.8000 F3000
            ; layer end
            T0;
            G1 E-0.8000 F3000
            ; feature skirt
            ; tool H0.200 W0.400
            G1 Z0.200 F360
            G1 X145.575 Y112.700 F9000
            G1 E0.8000 F3000
            G1 X139.600 Y106.725 E0.2810 F90
            G1 X137.300 Y104.425 E0.1082
            G1 X137.300 Y95.575 E0.2944
            G1 X145.575 Y87.300 E0.3892
            G1 X154.425 Y87.300 E0.2944
            G1 X156.725 Y89.600 E0.1082
            G1 X162.700 Y95.575 E0.2810
            G1 X162.700 Y104.425 E0.2944
            G1 X154.425 Y112.700 E0.3892
            G1 X145.575 Y112.700 E0.2944
            G1 E-0.8000 F3000
            ; feature cross - external single extrusion
            ; tool H0.200 W0.400
            G1 Z0.400 F360
            G1 X147.738 Y100.000 F9000
            G1 Z0.200 F360
            G1 E0.8000 F3000
            G1 X149.641 Y100.000 E0.0633 F45
            G1 X150.000 Y99.641 F9000
            G1 X150.000 Y97.738 E0.0633 F45
            G1 E-0.8000 F3000
            G1 Z0.400 F360
            G1 X152.262 Y100.000 F9000
            G1 Z0.200 F360
            G1 E0.8000 F3000
            G1 X150.279 Y100.000 E0.0659 F45
            G1 X150.200 Y100.000 E0.0026
            ; tool H0.200 W0.416
            G1 X150.117 Y100.000 E0.0029
            ; tool H0.200 W0.499
            G1 X150.000 Y100.000 E0.0049
            G1 X150.000 Y100.117 E0.0049
            ; tool H0.200 W0.416
            G1 X150.000 Y100.200 E0.0029
            ; tool H0.200 W0.400
            G1 X150.000 Y100.279 E0.0026
            G1 X150.000 Y102.262 E0.0659
            G1 E-0.8000 F3000
            ; layer end
            ; pass 2
            T1
            G1 E-0.8000 F3000
            ; feature skirt
            ; tool H0.200 W0.400
            G1 Z0.200 F360
            G1 X145.575 Y112.700 F9000
            G1 E0.8000 F3000
            G1 X139.600 Y106.725 E0.2810 F90
            G1 X137.300 Y104.425 E0.1082
            G1 X137.300 Y95.575 E0.2944
            G1 X145.575 Y87.300 E0.3892
            G1 X154.425 Y87.300 E0.2944
            G1 X156.725 Y89.600 E0.1082
            G1 X162.700 Y95.575 E0.2810
            G1 X162.700 Y104.425 E0.2944
            G1 X154.425 Y112.700 E0.3892
            G1 X145.575 Y112.700 E0.2944
            G1 E-0.8000 F3000
            ; feature cross - external single extrusion
            ; tool H0.200 W0.400
            G1 Z0.400 F360
            G1 X147.738 Y100.000 F9000
            G1 Z0.200 F360
            G1 E0.8000 F3000
            G1 X149.641 Y100.000 E0.0633 F45
            G1 X150.000 Y99.641 F9000
            G1 X150.000 Y97.738 E0.0633 F45
            G1 E-0.8000 F3000
            G1 Z0.400 F360
            G1 X152.262 Y100.000 F9000
            G1 Z0.200 F360
            G1 E0.8000 F3000
            G1 X150.279 Y100.000 E0.0659 F45
            G1 X150.200 Y100.000 E0.0026
            ; tool H0.200 W0.416
            G1 X150.117 Y100.000 E0.0029
            ; tool H0.200 W0.499
            G1 X150.000 Y100.000 E0.0049
            G1 X150.000 Y100.117 E0.0049
            ; tool H0.200 W0.416
            G1 X150.000 Y100.200 E0.0029
            ; tool H0.200 W0.400
            G1 X150.000 Y100.279 E0.0026
            G1 X150.000 Y102.262 E0.0659
            G1 E-0.8000 F3000
            ; layer end
            T0;
            G1 E-0.8000 F3000
            ; feature skirt
            ; tool H0.200 W0.400
            G1 Z0.200 F360
            G1 X145.575 Y112.700 F9000
            G1 E0.8000 F3000
            G1 X139.600 Y106.725 E0.2810 F90
            G1 X137.300 Y104.425 E0.1082
            G1 X137.300 Y95.575 E0.2944
            G1 X145.575 Y87.300 E0.3892
            G1 X154.425 Y87.300 E0.2944
            G1 X156.725 Y89.600 E0.1082
            G1 X162.700 Y95.575 E0.2810
            G1 X162.700 Y104.425 E0.2944
            G1 X154.425 Y112.700 E0.3892
            G1 X145.575 Y112.700 E0.2944
            G1 E-0.8000 F3000
            ; feature cross - external single extrusion
            ; tool H0.200 W0.400
            G1 Z0.400 F360
            G1 X147.738 Y100.000 F9000
            G1 Z0.200 F360
            G1 E0.8000 F3000
            G1 X149.641 Y100.000 E0.0633 F45
            G1 X150.000 Y99.641 F9000
            G1 X150.000 Y97.738 E0.0633 F45
            G1 E-0.8000 F3000
            G1 Z0.400 F360
            G1 X152.262 Y100.000 F9000
            G1 Z0.200 F360
            G1 E0.8000 F3000
            G1 X150.279 Y100.000 E0.0659 F45
            G1 X150.200 Y100.000 E0.0026
            ; tool H0.200 W0.416
            G1 X150.117 Y100.000 E0.0029
            ; tool H0.200 W0.499
            G1 X150.000 Y100.000 E0.0049
            G1 X150.000 Y100.117 E0.0049
            ; tool H0.200 W0.416
            G1 X150.000 Y100.200 E0.0029
            ; tool H0.200 W0.400
            G1 X150.000 Y100.279 E0.0026
            G1 X150.000 Y102.262 E0.0659
            G1 E-0.8000 F3000
            ; layer end
            M117 Print Complete !
            T-1
            M999

            Simple_cross.jpg

            undefined 1 Reply Last reply 1 Dec 2021, 18:50 Reply Quote 1
            • undefined
              dc42 administrators @GeneRisi
              last edited by 1 Dec 2021, 18:50

              @generisi please post your tool change files again, because you have changed them since you posted them.

              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

              undefined 1 Reply Last reply 1 Dec 2021, 19:09 Reply Quote 0
              • undefined
                GeneRisi @dc42
                last edited by GeneRisi 12 Jan 2021, 19:11 1 Dec 2021, 19:09

                @dc42 OK, I will now

                ; tpost0.g
                ; called after tool 0 has been selected
                ;heatup
                M116 P0
                ;prime nozzle
                ;M98 Pprime.g
                ;mesh levelling on
                G29 Q1
                ;PCF fan on
                ;M106 P2 S255
                G1 R2 X0 Y0 Z2
                G1 R2 Z0 F360
                ; tpost1.g
                ; called after tool 1 has been selected
                ;heatup
                M116 P1
                ;prime nozzle
                ;M98 Pprime.g
                ;mesh levelling on
                G29 Q1
                ;PCF fan on
                ;M106 P4 S255
                G1 R2 X0 Y0 Z2
                G1 R2 Z0 F360

                The Free and pre files have not changed.

                undefined 1 Reply Last reply 3 Dec 2021, 13:47 Reply Quote 0
                • undefined
                  T3P3Tony administrators @GeneRisi
                  last edited by 3 Dec 2021, 13:47

                  @generisi with the image with the two cross prints you showed. Do you mean that T0 and T1 printed one of the crosses perfectly aligned and then the next time T1 was used it printed the miss aligned cross?

                  www.duet3d.com

                  undefined 1 Reply Last reply 3 Dec 2021, 16:02 Reply Quote 0
                  • undefined
                    GeneRisi @T3P3Tony
                    last edited by GeneRisi 12 Mar 2021, 16:10 3 Dec 2021, 16:02

                    @t3p3tony Hi Tony, T1 printed the cross in one location and T0 printed the cross in the other location. Even when repeating the sequence a second time, T1 prints in one location and T0 in the other location.

                    If the order is switched, so that T0 is used first, then T1, the crosses align as expected. This is also true if the sequence is T0, T1, T0, T1.

                    FWIW, many years ago, I used to be a programmer and when I think about this, uninitialized values that are referenced comes to mind... FWIW

                    @dc42 , is there some level of debugging I can turn on that might provide you some helpful information?

                    undefined 1 Reply Last reply 4 Dec 2021, 09:16 Reply Quote 0
                    • undefined Phaedrux marked this topic as a question 3 Dec 2021, 18:30
                    • undefined
                      dc42 administrators @GeneRisi
                      last edited by 4 Dec 2021, 09:16

                      @generisi I have a theory about what us happening. Tool offsets are usually ignored in system macro files. So I think the G1 R2 X0 Y0 Z0 command at the end of config.g is ignoring the tool offsets. This obviously isn't wanted in this case.

                      I will do some tests to confirm or refute this theory.

                      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

                      undefined 2 Replies Last reply 4 Dec 2021, 21:13 Reply Quote 0
                      • undefined
                        GeneRisi @dc42
                        last edited by GeneRisi 12 Apr 2021, 23:24 4 Dec 2021, 21:13

                        @dc42 I only added this line after the exchange with @T3P3Tony above; I did, however, use G1 R2 Z0 before communicating with Tony. As an alternative, I can remove the G1 R2 command and use Simplify3d's internal state variables to restore the X, Y and Z locations. Let me know whether this would be a helpful test.
                        Gene

                        I removed the G1 R2 commands from the tpostx macros. It didn't change the outcome.
                        Gene

                        Why would the tool offsets matter for a move that simply gets the new tool head near the area where it will be used? The printing doesn't occur until a few gcode commands after this move. Aren't the tool offsets applied to every gcode move command?
                        Gene

                        1 Reply Last reply Reply Quote 0
                        • undefined
                          GeneRisi @dc42
                          last edited by 7 Dec 2021, 13:36

                          @dc42 Is there something I can do t help debugging this?

                          1 Reply Last reply Reply Quote 0
                          • undefined
                            GeneRisi
                            last edited by GeneRisi 12 Aug 2021, 01:41 7 Dec 2021, 19:49

                            @dc42 I found the problem.

                            When tool T1 was being returned, the Y "parking" coordinate was off by 1 mm. The tool parking location didn't budge but the firmware thought that the tool location was 1mm beyond where it actually was. The machine is a corexy (E3D), so even though only the Y coordinate was off, I suspect it affected both the x and y location from the the firmware's perspective.

                            1 Reply Last reply Reply Quote 2
                            • undefined GeneRisi has marked this topic as solved 8 Dec 2021, 01:41
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