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Bl-touch re-deploy after probing or z homing

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  • undefined
    bugm
    last edited by 11 Oct 2018, 14:50

    Hi
    I installed a Bl-touch clone and something wired happening.
    All seems to be fine when running the deploy, retract and self test macros.
    however when i home Z-axis or doing a mesh bed compensation - something wired happens:
    1 The probe goes to the requested coordinates
    2 deploy the pin
    3 the bed goes up toward the bl-touch sensor.
    4 after the pin tuoch the bed its auto retract.
    5 the bed starts going down
    until now all is just fine..

    After it probed the point - while the bed goes down away from
    the probe - the pin suddenly deployed again, hits the bed very fast and retracts.
    this can happen randomly, about 20% of the probed points and
    it effecting the bed mesh as red area that appears on the mesh map.
    All suggestions are welcomed 🙂

    p.s i am running the latest duetwifi 2 fw on corexy printer

    1 Reply Last reply Reply Quote 1
    • undefined
      dc42 administrators
      last edited by 11 Oct 2018, 20:58

      Update the firmware to 2.01 or 2.02RC2.

      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 0
      • undefined
        BLV
        last edited by BLV 10 Dec 2018, 11:18 12 Oct 2018, 11:17

        so i am not the only one who is getting this behavior
        same situation here, it deploys randomly right after probing with the 2.02rc2
        on sunday i'll get my bud touch sensor just to make sure its not a bad one.
        cables are fine, no shorts or disconnection.
        thought about adding some delay or fast dropping the bed before it will bump it.

        1 Reply Last reply Reply Quote 1
        • undefined
          tjb1
          last edited by tjb1 10 Dec 2018, 12:26 12 Oct 2018, 12:23

          I had this same issue with a BLTouch from TriangleLab. It would deploy, touch the bed, retract, and then shoot back out and retract again. It also fell down in the middle of the print several times causing it to keep catching on the print and if it didn't fall all the way it would error out. I tried rewiring it (including pulling the wires away from the stepper/heater wires) and even mode 9 with no success. I don't know if it's because it's a clone or not but I took it off and switched to piezo.

          1 Reply Last reply Reply Quote 0
          • undefined
            dc42 administrators
            last edited by 12 Oct 2018, 13:07

            This behaviour was common when using earlier firmwares, but only caused a problem if the Z travel speed of the probe after triggering was low. It was fixed in firmware 2.01. See https://github.com/dc42/RepRapFirmware/blob/dev/WHATS_NEW.md.

            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 14 Oct 2018, 07:32 Reply Quote 0
            • undefined
              tjb1
              last edited by 12 Oct 2018, 13:53

              Would this include it randomly falling in the middle of a print or is that a different issue?

              undefined undefined 2 Replies Last reply 12 Oct 2018, 14:20 Reply Quote 0
              • undefined
                genghisnico13 @tjb1
                last edited by 12 Oct 2018, 14:20

                @tjb1 Perhaps you could try unscrewing the top screw (core) a little, I never experienced that issue, but maybe this helps.

                undefined 1 Reply Last reply 12 Oct 2018, 19:01 Reply Quote 0
                • undefined
                  dc42 administrators @tjb1
                  last edited by 12 Oct 2018, 15:00

                  @tjb1 said in Bl-touch re-deploy after probing or z homing:

                  Would this include it randomly falling in the middle of a print or is that a different issue?

                  No, that would be a different issue.

                  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 0
                  • undefined
                    BLV @genghisnico13
                    last edited by 12 Oct 2018, 19:01

                    @genghisnico13 said in Bl-touch re-deploy after probing or z homing:

                    @tjb1 Perhaps you could try unscrewing the top screw (core) a little, I never experienced that issue, but maybe this helps.

                    yesterday i cleaned, magnetized and replaced the heatshrink but its still deploying randomly .

                    1 Reply Last reply Reply Quote 0
                    • undefined
                      bugm @dc42
                      last edited by bugm 14 Oct 2018, 07:32

                      @dc42 said in Bl-touch re-deploy after probing or z homing:

                      This behaviour was common when using earlier firmwares, but only caused a problem if the Z travel speed of the probe after triggering was low. It was fixed in firmware 2.01. See https://github.com/dc42/RepRapFirmware/blob/dev/WHATS_NEW.md.

                      I am running the latest 2.02RC2 version

                      @blv said in Bl-touch re-deploy after probing or z homing:

                      @genghisnico13 said in Bl-touch re-deploy after probing or z homing:

                      @tjb1 Perhaps you could try unscrewing the top screw (core) a little, I never experienced that issue, but maybe this helps.

                      yesterday i cleaned, magnetized and replaced the heatshrink but its still deploying randomly .

                      thanks,this morning i bought a shrink and replaced it too and yet it still doing it.
                      its functioning flawlessly in test mode but while probing its still deploying twice.

                      1 Reply Last reply Reply Quote 0
                      • undefined
                        dc42 administrators
                        last edited by 14 Oct 2018, 08:40

                        Please run M558 and check that it reports you are using Z probe mode 9.

                        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 undefined 2 Replies Last reply 14 Oct 2018, 09:58 Reply Quote 1
                        • undefined
                          bugm @dc42
                          last edited by bugm 14 Oct 2018, 09:58

                          @dc42 said in Bl-touch re-deploy after probing or z homing:

                          Please run M558 and check that it reports you are using Z probe mode 9.

                          Thank you, it look s like it is on mode 9. maybe i need to try mode 5?
                          0_1539510952235_4564664646.jpg

                          edit: when trying mode 5 the pin deploy agian (twice) instead of once but the second deploy is with a 1 sec delay.

                          1 Reply Last reply Reply Quote 0
                          • undefined
                            BLV @dc42
                            last edited by BLV 14 Oct 2018, 11:05

                            @dc42 said in Bl-touch re-deploy after probing or z homing:

                            Please run M558 and check that it reports you are using Z probe mode 9.

                            I can confirm that my friend's bltouch is acting same. even changed the wiring and its beeing deployed twice - at neer 30% of the probing points.
                            2.02rc2 on mode 9 too.

                            1 Reply Last reply Reply Quote 1
                            • undefined
                              dc42 administrators
                              last edited by dc42 14 Oct 2018, 16:17

                              Is this on a Duet WiFi, Ethernet, or Maestro?

                              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 15 Oct 2018, 06:36 Reply Quote 0
                              • undefined
                                BLV
                                last edited by BLV 14 Oct 2018, 17:37

                                Mine is a DuetWifi 2 v1.01
                                today i played with all the M558 parameters but nothing changed this wired behavior.
                                the Bltouch is a clone with 3.3v output (trace has been cut)

                                1 Reply Last reply Reply Quote 0
                                • undefined
                                  Phaedrux Moderator
                                  last edited by 14 Oct 2018, 19:41

                                  I think it being a clone has more to do with it than anything.

                                  Have you verified the trace is cut with a multimeter?

                                  Z-Bot CoreXY Build | Thingiverse Profile

                                  undefined 1 Reply Last reply 15 Oct 2018, 03:37 Reply Quote 0
                                  • undefined
                                    BLV @Phaedrux
                                    last edited by BLV 15 Oct 2018, 03:37

                                    @phaedrux said in Bl-touch re-deploy after probing or z homing:

                                    I think it being a clone has more to do with it than anything.

                                    Have you verified the trace is cut with a multimeter?

                                    I dont think so, because yeataday i installed my friend's genuine Bltouch v2.0 smart and it has the same problem.
                                    Yes, i used a microscope at work to cut the trace and verified with a fluke.

                                    undefined 1 Reply Last reply 15 Oct 2018, 03:41 Reply Quote 0
                                    • undefined
                                      Phaedrux Moderator @BLV
                                      last edited by Phaedrux 15 Oct 2018, 03:41

                                      @blv sorry I missed that.

                                      What are using for M558?
                                      What are your movement speed settings?

                                      Z-Bot CoreXY Build | Thingiverse Profile

                                      undefined 1 Reply Last reply 15 Oct 2018, 06:16 Reply Quote 0
                                      • undefined
                                        BLV @Phaedrux
                                        last edited by 15 Oct 2018, 06:16

                                        @phaedrux
                                        M307 H3 A-1 C-1 D-1
                                        M558 P9 H5 F100 T6000

                                        1 Reply Last reply Reply Quote 0
                                        • undefined
                                          bugm @dc42
                                          last edited by bugm 15 Oct 2018, 06:36

                                          @dc42 said in Bl-touch re-deploy after probing or z homing:

                                          Is this on a Duet WiFi, Ethernet, or Maestro?

                                          i got the 1.01 - i erased the firmware and installed again 2.02RC2 from scratch - no difference.
                                          no idea what to do, replacing the wires made no difference.
                                          even while homing z axis alone, every 2-3 homing it keeps happening - after probing the pin deploys
                                          again while the bed moving down (core xy). it hits the glass before the bed went down, then retracts.
                                          just to check as @Blv - i installed it on my mks gen-l and it works without any issue.

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