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    Cant get my nozzle close to bed at all when trying to print

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    • Puppet172undefined
      Puppet172
      last edited by

      OK, so i am building a massive printer ~3ft cubed and the bed surface i'm using isn't the most flat but it works as a bed. So i decided to get a z probe to auto level. This hasn't seemed to change anything because it doesn't seem to be compensating mid print. Why this is happening I don't know. I have done probes with a lot of points ~ 300 or so and it still doesn't seem to be changing mid print. Also I don't know if im doing my z probe calibration right but i assume i followed the guide. Any help would be much appreciated. kinda stuck right now.
      Thanks,
      Bennett

      0_1530327107895_config (2).g

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      • Phaedruxundefined
        Phaedrux Moderator
        last edited by

        Couple questions

        Are you sure your z steps are 4000?

        How did you measure your z offset for the G31 command?

        Are you using mesh compensation?

        I don't see anywhere in your config where you load the height map.

        Can you see the z axis move at all if you move to z=0 and move the head in x and y?

        Which guide did you follow?

        Z-Bot CoreXY Build | Thingiverse Profile

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        • Puppet172undefined
          Puppet172 @Phaedrux
          last edited by

          @phaedrux

          1. they might be a little off but i don't know because i haven't been able to get a solid cube done to measure the height. but i can check now
          2. I put the head in the middle of the bed and the put it down so it barely grabbed my piece of paper. then i did G92 Z0 and then moved the head up ~3 mm and then did G30 S-1 to home z in that point. then i put the number that i got in the z axis as my offset.
          3. Yes, i am using mesh bed compensation.
          4. I don't know how to put that in config so it works in prints or anything, i thought that was automatic.
          5. i don't believe so it would only move if that head started to scrape against the bed because the bed isn't completely flat
            6.https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe

          If you need any other files i can post them
          Thanks,
          Bennett

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          • dc42undefined
            dc42 administrators
            last edited by

            How are you homing Z? Please post your homez.g and homeall.g files.

            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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            • Puppet172undefined
              Puppet172
              last edited by

              I am homing with z probe. Also i figured out one problem and it was that my z steps were way off bc they were at 4000 but they were supposed to be at 2000. so that fixed some stuff but i still don't think the compensation is working while printing

              0_1530374213194_homez (1).g

              0_1530374220925_homeall.g

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              • Phaedruxundefined
                Phaedrux Moderator @Puppet172
                last edited by

                @puppet172

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

                https://duet3d.dozuki.com/Wiki/Gcode#Section_M375_Load_height_map

                M375 with no parameters will load the default height map.

                Homing files look ok to me I think.

                Z-Bot CoreXY Build | Thingiverse Profile

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                • dc42undefined
                  dc42 administrators
                  last edited by

                  I agree, homing files look ok. G29 S1 also loads the height map. Which firmware version are you using?

                  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

                  Puppet172undefined 1 Reply Last reply Reply Quote 0
                  • Puppet172undefined
                    Puppet172 @dc42
                    last edited by

                    @dc42 @Phaedrux

                    Firmware Name: RepRapFirmware for Duet WiFi
                    Firmware Electronics: Duet WiFi 1.0 + DueX5
                    Firmware Version: 1.19.2 (2017-09-01)
                    WiFi Server Version: 1.19.2
                    Web Interface Version: 1.19.3

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                    • dc42undefined
                      dc42 administrators
                      last edited by

                      With older firmware versions there is a known issue if the height map has a nonzero height offset at the XY point at which you do Z homing, and you home Z when a height map is loaded. Workarounds are to clear the height map before Z homing, or to upgrade to version 2.0 firmware.

                      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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                      • Puppet172undefined
                        Puppet172 @dc42
                        last edited by

                        @dc42 @Phaedrux
                        Just updated the firmware and now having homing problems like endstops hitting but not stopping the axis's

                        Puppet172undefined 1 Reply Last reply Reply Quote 0
                        • Puppet172undefined
                          Puppet172 @Puppet172
                          last edited by

                          @dc42 @Phaedrux
                          Fixed that but now it says insufficient axis's homed How can i stop this from happening becuase it say i need to home x and y first before homing z but i can home x because it says
                          G28 X
                          Error: G0/G1: insufficient axes homed

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                          • whosrdaddyundefined
                            whosrdaddy
                            last edited by whosrdaddy

                            Reading the firmware upgrade notes would have prevented this question 🙂
                            In recent firmwares you cannot move axes before they are homed, so you must add S2 to G1 moves for non homed axes...
                            Anyway, you can add M564 H0 to your config.g file to have the old behavior back...

                            Puppet172undefined 1 Reply Last reply Reply Quote 0
                            • Puppet172undefined
                              Puppet172 @whosrdaddy
                              last edited by

                              @dc42
                              How can i control my fans in the new server version because i only see control for Fan 0 and i have mine on 1&2

                              Puppet172undefined 1 Reply Last reply Reply Quote 0
                              • Puppet172undefined
                                Puppet172 @Puppet172
                                last edited by

                                @puppet172
                                Nvm

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                                • Puppet172undefined
                                  Puppet172
                                  last edited by

                                  @dc42
                                  Still not using the mesh bed compensation during print. Even after i updated. Any idea why?

                                  Phaedruxundefined 1 Reply Last reply Reply Quote 0
                                  • Phaedruxundefined
                                    Phaedrux Moderator @Puppet172
                                    last edited by

                                    @puppet172 Did you add the M375 or G29 S1 command to load the height map to your config.g?

                                    Z-Bot CoreXY Build | Thingiverse Profile

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                                    • Puppet172undefined
                                      Puppet172 @Phaedrux
                                      last edited by

                                      @phaedrux
                                      no where would i add that
                                      0_1530485751276_config (3).g

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                                      • Phaedruxundefined
                                        Phaedrux Moderator
                                        last edited by

                                        Just add M375 anywhere in config.g.

                                        I put mine in the section where I configure the mesh size and z probe.

                                        Z-Bot CoreXY Build | Thingiverse Profile

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                                        • Puppet172undefined
                                          Puppet172 @Phaedrux
                                          last edited by

                                          @phaedrux
                                          That should fix it then?

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                                          • Phaedruxundefined
                                            Phaedrux Moderator
                                            last edited by

                                            That will load the height map if you've run a successful compensation probing. That will adjust the nozzle height based on the probe data to keep it at the specified height from the bed at all times.

                                            Hopefully that will resolve your issue.

                                            Z-Bot CoreXY Build | Thingiverse Profile

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