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    Homing advice

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    Tuning and tweaking
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    • agent0810undefined
      agent0810 @Phaedrux
      last edited by agent0810

      @Phaedrux

      alright so it helps if i actually make the changes you want. after i re-did the changes you want the homing works fine now AND THE BED STAYS UP when i send a print. The extruder is still crashing into the stops right away when i send a print job and i dont have any fillament coming out yet.

      PROGRESS 🙂

      Should i swap the fan to an always on port?

      Phaedruxundefined 1 Reply Last reply Reply Quote 0
      • agent0810undefined
        agent0810
        last edited by

        So when i home it, x and y go to 225 and z goes to 0. but if i want -z to go down shouldnt 0 be at the bottom? how would i swap that around, change the motor direction like you suggested in your last post?

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        • Phaedruxundefined
          Phaedrux Moderator @agent0810
          last edited by

          @agent0810 said in Homing advice:

          Should i swap the fan to an always on port?

          No, swap the hotend fan and the part cooling fan plugs.

          @agent0810 said in Homing advice:

          but if i want -z to go down shouldnt 0 be at the bottom?

          No, 0 is when the nozzle is touching the bed and +Z means the bed is going down as the print gets taller. It's a bit different with a bed that moves in Z as opposed to a bed that stays put and the nozzle raises. But think of it as the print gets bigger as the nozzle and bed get further apart. The print starts at 0 and grows.

          @agent0810 said in Homing advice:

          The extruder is still crashing into the stops right away when i send a print job

          So the print head isn't moving around the center area of the bed? But you can jog the print head around the entire bed area without problem?

          and i dont have any fillament coming out yet.

          Double check your extruder wiring. Which driver are you connected to?

          If you remove your filament and then send M302 P1 to allow cold extrusion you should then be able to use the extrusion dialogue to move the extruder motor back and forth. Does that work?

          Z-Bot CoreXY Build | Thingiverse Profile

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          • agent0810undefined
            agent0810 @Phaedrux
            last edited by

            @Phaedrux

            swapped the fan plugs and now the front one is on.

            so when i do home all, everything goes to where it is supposed to but the z is at 0 at the top, so it cant go lower right? shouldnt it home at 300 something? im having issues moveing the bed.

            when i send a print the print head crashes for a bit, then it goes around like its printing but no fillament comes out.

            Ran the M302 P1 and nothing happened.

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            • agent0810undefined
              agent0810 @Phaedrux
              last edited by

              @Phaedrux
              when i hit z+ it tries to go up right now, and its already at the top from homing.

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              • Phaedruxundefined
                Phaedrux Moderator
                last edited by

                @agent0810 said in Homing advice:

                the z is at 0 at the top, so it cant go lower right? shouldnt it home at 300 something? im having issues moveing the bed.

                +Z should move the bed down. If that's not the case, we need to change the direction of rotation of the z motor like we did with the X Y.

                ;drives
                M569 P2 S1 ; physical drive 2 goes forwards
                

                Change that to S0 and test again that +z moves the bed down.

                @agent0810 said in Homing advice:

                when i send a print the print head crashes for a bit,

                That could just be it homing again because there is a G28 in the start gcode. If it's already at the endstops it will back off slightly and then home again. Then it will try and do the prime line part, and then start the print. So as long as it ends up moving around the center area of the bed I think that's ok.

                @agent0810 said in Homing advice:

                but no fillament comes out.

                Ok we need to see if the extruder motor is actually working. After you send M302 P1 that allows the extruder motor to move without being heated up. So if you have removed the filament you should be able to test the motor by sending extrude commands from the web interface.

                Z-Bot CoreXY Build | Thingiverse Profile

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                • agent0810undefined
                  agent0810 @Phaedrux
                  last edited by agent0810

                  @Phaedrux

                  the extrude and retract buttons are greyed out on the web interface even after the M302 P1 command 😞

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                  • Phaedruxundefined
                    Phaedrux Moderator
                    last edited by

                    How bout if you heat up the hotend to 180?

                    Z-Bot CoreXY Build | Thingiverse Profile

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                    • agent0810undefined
                      agent0810 @Phaedrux
                      last edited by

                      @Phaedrux got it up to 160 and now i can retract and extrude

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                      • agent0810undefined
                        agent0810 @Phaedrux
                        last edited by

                        @Phaedrux
                        M120 M83 G1 E10 F300 M121
                        Warning: Tool 0 was not driven because its heater temperatures were not high enough or it has a heater fault

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                        • agent0810undefined
                          agent0810 @Phaedrux
                          last edited by

                          @Phaedrux
                          at 180 seems to be working. i can see it moving

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                          • Phaedruxundefined
                            Phaedrux Moderator
                            last edited by

                            Alright, so at least we know the extruder is moving and extruding now.

                            Next you should go through the extruder calibration to set the correct steps per mm.

                            https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+4:+Calibration/40#s165

                            Z-Bot CoreXY Build | Thingiverse Profile

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                            • agent0810undefined
                              agent0810 @Phaedrux
                              last edited by

                              @Phaedrux said in Homing advice:

                              https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+4:+Calibration/40#s165

                              so retract is pushing out filament and extrude is pulling it back......

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                              • Phaedruxundefined
                                Phaedrux Moderator
                                last edited by

                                In that case we must change the motor direction once again

                                M569 P3 S1 ; physical drive 3 goes forwards

                                Change S1 to S0

                                Z-Bot CoreXY Build | Thingiverse Profile

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                                • agent0810undefined
                                  agent0810 @Phaedrux
                                  last edited by

                                  @Phaedrux

                                  I was able to print! My temp tower didn’t come out so hot though. What sorta things do I need to look into to fix?

                                  image.jpg

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                                  • agent0810undefined
                                    agent0810 @Phaedrux
                                    last edited by

                                    @Phaedrux image.jpg

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                                    • Phaedruxundefined
                                      Phaedrux Moderator
                                      last edited by

                                      Now that you have things working somewhat, you should go through the following guides to confirm correct operation and then do some calibration steps.

                                      https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+3:+Commissioning/39

                                      And

                                      https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+4:+Calibration/40

                                      Z-Bot CoreXY Build | Thingiverse Profile

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                                      • agent0810undefined
                                        agent0810
                                        last edited by

                                        image.jpg image.jpg

                                        Went through them both and it helped a bunch but I feel like there is still some room for improvement. Thoughts?

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                                        • Phaedruxundefined
                                          Phaedrux Moderator
                                          last edited by

                                          https://forum.duet3d.com/topic/14250/tuning-jerk-accel-speed-settings/2?_=1594350237285

                                          Z-Bot CoreXY Build | Thingiverse Profile

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