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Duet 3 6HC configure firmware dual Z motors Please Help

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  • undefined
    supertb1
    last edited by 11 Mar 2021, 18:58

    it did the maping first and then it did the leveling....lol...

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    • undefined
      Phaedrux Moderator
      last edited by 11 Mar 2021, 19:52

      Yeah move the G29 to the end

      Z-Bot CoreXY Build | Thingiverse Profile

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      • undefined
        supertb1
        last edited by 12 Mar 2021, 01:41

        I am doing my first test print with this machine and everything starts perfectly, I am using Prusa slicer and the part is a small round dimensional calibration pyramid. it does the first layer perfectly and then all of a sudden the BL touch drops the probe and then a what seems to be 20 or 30 seconds the probe lifts, now that the print head is high enough that the probe isn't touching the build plate the probe is not retracting, it is just hanging out there and the red light intermittently flashes. Any ideas

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        • undefined
          Phaedrux Moderator
          last edited by 12 Mar 2021, 02:41

          Post the gcode file you're printing. Either there are commands somewhere telling it to deploy the probe, or something is wrong with the BLtouch.

          Z-Bot CoreXY Build | Thingiverse Profile

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          • undefined
            supertb1
            last edited by 14 Mar 2021, 20:07

            collosus dimensional_accuracy_test5.gcode

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            • undefined
              supertb1
              last edited by 14 Mar 2021, 20:13

              except for an occasional fan speed and feed rate change it is pretty much G1 X(number), Y(number), extrude length. I ran it again today and it seem to do fine for the first 3 layers and then it acts like the BLtouch is trying to do a self test and after a few attempts it stops trying. I added a self test, alarm release, plunger in and out macro so this time I stopped the program and brought the tool head to home position and attempted to do a self test. no response, I pushed the plunger in and attempted a self test again, the plunger cycled out once and stopped faulted. I could not electronically retract the plunger.

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              • undefined
                Phaedrux Moderator
                last edited by 14 Mar 2021, 20:18

                It sounds like it's got an intermittent 5v connection and is rebooting the BLtouch.

                Z-Bot CoreXY Build | Thingiverse Profile

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                • undefined
                  supertb1
                  last edited by 14 Mar 2021, 20:18

                  is the BLtouch subject to EMF or heat related failures? my bed is set to 80C and the wires run through a harness to a junction box that the extruder and fan motors are running out of. I also have the ground wire doubled up going to the BLtouch from my Duet 3 6HC.
                  What I think might have happened during installation I had the 3.3vdc pin on the digital out (white) wire instead of the #7I/O(in) like it should have been by mistake.

                  undefined 1 Reply Last reply 14 Mar 2021, 20:19 Reply Quote 0
                  • undefined
                    Phaedrux Moderator @supertb1
                    last edited by 14 Mar 2021, 20:19

                    @supertb1 said in Duet 3 6HC configure firmware dual Z motors Please Help:

                    What I think might have happened during installation I had the 3.3vdc pin on the digital out (white) wire instead of the #7I/O(in) like it should have been by mistake.

                    Has that been corrected?

                    Z-Bot CoreXY Build | Thingiverse Profile

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                    • undefined
                      supertb1
                      last edited by 14 Mar 2021, 20:19

                      yes, this problem was corrected after the first few minutes of trouble shooting

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                      • undefined
                        supertb1
                        last edited by 14 Mar 2021, 20:21

                        it just seems like it is solid until I am a few minutes into printing... kind of hard to call it an intermittent 5V.... I suppose I could recheck my terminations again

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                        • undefined
                          Phaedrux Moderator
                          last edited by 14 Mar 2021, 20:31

                          Intermittent wire connection based on print head position is pretty common.

                          Z-Bot CoreXY Build | Thingiverse Profile

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                          • undefined
                            supertb1
                            last edited by 14 Mar 2021, 21:35

                            20210314_163246_469922973031831.mp4

                            undefined 1 Reply Last reply 14 Mar 2021, 21:37 Reply Quote 0
                            • undefined
                              supertb1
                              last edited by 14 Mar 2021, 21:37

                              4.8vdc on the red wire at all times

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                              • undefined
                                fcwilt @supertb1
                                last edited by 14 Mar 2021, 21:37

                                @supertb1 said in Duet 3 6HC configure firmware dual Z motors Please Help:

                                20210314_163246_469922973031831.mp4

                                It is generally felt that you should not turn your printer on it's side while it is printing.

                                😉

                                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

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                                • undefined
                                  supertb1
                                  last edited by 14 Mar 2021, 21:46

                                  lol.... well if I turn the printer upside down maybe the BL touch will work better... I have several friends that have many expletive's to describe the BLtouch.... I double checked my wire terminations and everything is solid, there is no movement in the terminations of the BLtouch as everything is in junction boxes. I have proper voltages at all times... i guess the next thing is to bite the bullet and order another BLtouch... at least then I can rule out weather it is something in the the BL touch or if the problem follows... are there any tests I can do to trouble shoot besides ohming ends of wire, voltage checks, BLtouch on board testing... it self calibrates on start up...

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                                  • undefined
                                    supertb1
                                    last edited by 14 Mar 2021, 21:52

                                    Does the BLtouch have a length of wire issue,(resistance) on my machine there is probably 6 or 7 feet of wire between the board and the BLtouch...

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                                    • undefined
                                      Phaedrux Moderator
                                      last edited by 14 Mar 2021, 22:30

                                      Very strange. Testing with another BLtouch would be informative.

                                      Maybe it's picking up noise on the servo signal wires?

                                      Z-Bot CoreXY Build | Thingiverse Profile

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                                      • undefined
                                        supertb1
                                        last edited by 14 Mar 2021, 22:43

                                        Tomorrow I'll try to short whip it and see if that could be the case... going to piss me off if I have to run a shielded cable just for the BLtouch...lol... wouldn't surprise me I guess... I lack the experience with this sensor to know if EMF is an issue with other electronics

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                                        • undefined
                                          supertb1
                                          last edited by 16 Mar 2021, 20:16

                                          Update, I looked at another forum page and saw that some one changed there "P" value in there G31 P500 X10 Y10 Z2.5 ; set Z probe trigger value, offset and trigger height line from P500 to P100 and they claimed that this solved their problem. I made this same change with no effect. then I ran a 2 meter long cable outside of the wire tray to the sensor and vwala, it is homing and printing perfectly. So in my case it appears that EMF and wire length plaid a role in the culprit

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