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    Solved: Setting Z offset for T1

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    • zerspaner_gerdundefined
      zerspaner_gerd @RajaaKahel
      last edited by

      @RajaaKahel

      After the tool change, a Z value must be present, otherwise the axis will not be approached.

      Part of my tool change script from S3D:

      T[new_tool] ; New Tool
      
      G1 X[next_position_x] Y[next_position_y] Z[next_position_z] F9000

      Board: Duet WiFi 1.03 | Firmware Version: 3.1.1 | WiFi Server Version: 1.23 | Web Interface Version: 3.1.1

      RajaaKahelundefined 1 Reply Last reply Reply Quote 0
      • RajaaKahelundefined
        RajaaKahel @zerspaner_gerd
        last edited by

        @zerspaner_gerd My problem is that Duet is not applying the offset I want for T1. It's ignoring it. Through G10 in config.g and through any other command anywhere else.
        Also it's acting weird if you read my last comment.

        zerspaner_gerdundefined 1 Reply Last reply Reply Quote 0
        • zerspaner_gerdundefined
          zerspaner_gerd @RajaaKahel
          last edited by

          @rajaakahel For me, the z-offset works, why should not it work for you?

          Share your gcode, maybe I can find an explanation!

          Which firmware version do you use?

          Board: Duet WiFi 1.03 | Firmware Version: 3.1.1 | WiFi Server Version: 1.23 | Web Interface Version: 3.1.1

          RajaaKahelundefined 1 Reply Last reply Reply Quote 0
          • RajaaKahelundefined
            RajaaKahel @zerspaner_gerd
            last edited by

            @zerspaner_gerd 0_1535130513803_8.gcode

            Macros:
            https://drive.google.com/open?id=1Nwte-EtKEzL_ogCqJp7PMQ2qsLK7RBkM

            Configurations:
            https://drive.google.com/open?id=1q-h8eojJ91CQwK2p5YhWKuQaQph0sQ_T

            Here's everything.. I'd appreciate it if you or anyone could find anything!

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            • zerspaner_gerdundefined
              zerspaner_gerd
              last edited by

              I have to give up, Sorry.

              I find no big differences to my config.g.
              The gcode is already very different but he should not make these problems!

              Maybe a try, copy your tool Macro directly into the Duet Tool Macro, so that without M98 (subbrogram)

              Board: Duet WiFi 1.03 | Firmware Version: 3.1.1 | WiFi Server Version: 1.23 | Web Interface Version: 3.1.1

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              • dc42undefined
                dc42 administrators
                last edited by dc42

                @RajaaKahel, if the tool 1 nozzle is 0.85mm lower than tool 0 then I think you need Z-0.85 in the G10 P1 command, not Z0.85.

                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

                RajaaKahelundefined 2 Replies Last reply Reply Quote 0
                • RajaaKahelundefined
                  RajaaKahel @dc42
                  last edited by

                  @dc42 Tool 1 nozzle is actually longer than Tool 0 nozzle by 0.85mm.
                  I updated to:
                  Firmware Version: 2.02beta1(RTOS) (2018-08-12b5)
                  WiFi Server Version: 1.21RC4(08b3)
                  Web Interface Version: 1.22

                  Nothing solved.

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

                    @rajaakahel said in Setting Z offset for T1:

                    @dc42 Tool 1 nozzle is actually longer than Tool 0 nozzle by 0.85mm.

                    So do you mean the Tool 1 nozzle is 0.85mm lower than tool 0, or higher?

                    Where two tools have different nozzle heights, in the tool change files (probably the tpre file) you will need to raise Z so that when you bring in the tool with the lower nozzle after using the other one, its nozzle will be clear of the print. Use command G1 R2 Z0 at or near the end of the tpost file to put it at the right height before continuing the print.

                    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

                    RajaaKahelundefined 2 Replies Last reply Reply Quote 0
                    • RajaaKahelundefined
                      RajaaKahel @dc42
                      last edited by

                      @dc42 during the last test:
                      "I tried again with 50mm Z offset for T1"
                      Something very strange happened!
                      First T0 was printing, then the tool changed to T1 (nothing happened, no Z offset) but then when the tool changed back to T0 the bed moved by about 50mm down and went back to continue printing.
                      After that and before that it didn't move down by 50mm at all.

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                      • RajaaKahelundefined
                        RajaaKahel @dc42
                        last edited by

                        @dc42 T1 is higher than T0. I tried with many gcommands to raise the bed, but they didn't work. I'll try now with G1 R2 Z50

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                        • RajaaKahelundefined
                          RajaaKahel @dc42
                          last edited by RajaaKahel

                          @dc42
                          Ok now the bed is moving down by the value I entered (50mm) Before T1 is activated but it goes back to 0.2mm (the layer height) after T1 is activated. It should go to 50.2mm after T1 is selected and stay there to print. (So now the Z offset is taken into account only during tool change).

                          Thank you for your time, we are getting closer 🙂

                          ; tfree1.g
                          ; called when tool 1 is freed
                          G1 R2 Z-50
                          M98 P/macros/parkT1

                          ; tpre1.g
                          ; called before tool 1 is selected

                          G1 R2 Z50

                          1 Reply Last reply Reply Quote 0
                          • RajaaKahelundefined
                            RajaaKahel
                            last edited by

                            I gave up on this. So much time for nothing. Sometimes it works, sometimes it's not. even tho same commands are used and after rebooting and homing. And the most important is in config.g
                            The z offset doesn't work. (G10 P1 X0 Y0 Z0.85)

                            I'll have to redesign the tool mounts to be adjustable mechanically instead or move back to Marlin..

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                            • dc42undefined
                              dc42 administrators
                              last edited by

                              I'll look into this when I get time. However, E3D uses Duets to control their tool changers and they haven't reported any similar problems.

                              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

                              RajaaKahelundefined 1 Reply Last reply Reply Quote 0
                              • RajaaKahelundefined
                                RajaaKahel
                                last edited by

                                I appreciate that! 🙂

                                1 Reply Last reply Reply Quote 0
                                • RajaaKahelundefined
                                  RajaaKahel @dc42
                                  last edited by

                                  @dc42
                                  Here's a short video I recorded for you so you can see what actually is happening and maybe it makes it easier to solve the problem.
                                  I don't have any offset commands set anywhere else other than what you see in config.g.
                                  https://www.youtube.com/watch?v=MuGbiBkKNUI

                                  zerspaner_gerdundefined 1 Reply Last reply Reply Quote 0
                                  • zerspaner_gerdundefined
                                    zerspaner_gerd @RajaaKahel
                                    last edited by

                                    @rajaakahel
                                    Try this macro, and parts of what happens.

                                    G10 P0 S0 R0
                                    G10 P1 S0 R0
                                    G28
                                    T0
                                    G0 X100 Y100 Z50
                                    G4 S5
                                    M291 P"X100 Y100 Z50 with T0" S2 T0
                                    T1
                                    G4 S5
                                    M291 P"T1 active" S2 T0
                                    G0 X100 Y100 Z50
                                    G4 S5
                                    M291 P"X100 Y100 Z50 with T1" S2 T0
                                    
                                    T-1
                                    

                                    Board: Duet WiFi 1.03 | Firmware Version: 3.1.1 | WiFi Server Version: 1.23 | Web Interface Version: 3.1.1

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                                    • zerspaner_gerdundefined
                                      zerspaner_gerd
                                      last edited by zerspaner_gerd

                                      Just tested with mine,

                                      You have to do 30 negative (just to test)

                                      At positive 30 he wants to drive 29.8mm minus, but this would require the bed to be driven 29.8mm higher that does not make the Duet.
                                      At T0 Z0 position, it is over

                                      Board: Duet WiFi 1.03 | Firmware Version: 3.1.1 | WiFi Server Version: 1.23 | Web Interface Version: 3.1.1

                                      RajaaKahelundefined 2 Replies Last reply Reply Quote 0
                                      • RajaaKahelundefined
                                        RajaaKahel @zerspaner_gerd
                                        last edited by

                                        @zerspaner_gerd Thank you, I will try with negative value and see if it works

                                        1 Reply Last reply Reply Quote 0
                                        • RajaaKahelundefined
                                          RajaaKahel @zerspaner_gerd
                                          last edited by

                                          @zerspaner_gerd
                                          Thank you sir! That's it! in order to move the bed away from the nozzle, the value must be negative not positive!
                                          ; Tools
                                          M563 P0 D0 H1 ; Define tool 0
                                          G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
                                          G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C
                                          M563 P1 D1 H2 ; Define tool 1
                                          G10 P1 X0 Y0 Z-30 ; Set tool 1 axis offsets
                                          G10 P1 R0 S0

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

                                            Just to be clear, the XYZ parameters in the G10 commands are the offsets of the tip of the nozzle relative to the head reference point. You can choose the head reference point to be wherever you like, but the G10 offsets, G31 offsets for the Z probe and M208 limits must all be specified in terms of the head reference point.

                                            It's probably safest to choose the head reference point Z position to be the lowest nozzle you have (or slightly lower), so that the Z values in G10 commands for other tools are all positive.

                                            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 1
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