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    Bl touch time to time doesn't react

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    • felt342
      felt342 last edited by felt342

      Hi guys,

      I have a BL touch set up and running perfectly. But time to time it's just not reacting then homing - maybe 1 of 20. It does deploy probe but then bed coming close it just pushes a pin into BL touch and then hits nozzle until I press emergence stop. Is there a way to prevent bed moving after hitting nozzle?

      Firmware 2.05

      Thank you in advance!

      DIY-O-Sphere Phaedrux 2 Replies Last reply Reply Quote 0
      • DIY-O-Sphere
        DIY-O-Sphere @felt342 last edited by

        @felt342
        I had the same issue. Solved here.
        https://forum.duet3d.com/topic/11503/bltouch-randomly-stops-working/4

        1 Reply Last reply Reply Quote 0
        • felt342
          felt342 last edited by

          Sounds legit! 🙂 Thanks a lot I will try it and will make hundreds of Z homing to test it out! 🙂

          DIY-O-Sphere 1 Reply Last reply Reply Quote 0
          • DIY-O-Sphere
            DIY-O-Sphere @felt342 last edited by

            @felt342
            After adjusting i never had an issue.

            felt342 1 Reply Last reply Reply Quote 1
            • Phaedrux
              Phaedrux Moderator @felt342 last edited by Phaedrux

              @felt342 said in Bl touch time to time doesn't react:

              Is there a way to prevent bed moving after hitting nozzle?

              Reduce the motor current for homing moves such that the motor still moves reliably, but hopefully will stall as soon as it is blocked rather than try to ram through.

              M913 X35 Y35 Z35	; Reduce motor currents for homing
              G91			; relative positioning
              G1 S2 Z3 F600		; lift Z relative to current position
              G1 S1 X-250 Y-250 F4000 ; move quickly to X and Y axis endstops and stop there (first pass)
              G1 S2 X5 Y5 F4000	; go back a few mm
              G1 S1 X-240 Y-240 F360  ; move slowly to X and Y axis endstops once more (second pass)
              G90 			; absolute
              G1 X159 Y142 F6000	; move probe to bed center
              M558 F600 A1 		; Dive fast once 
              G30			; probe Z
              M558 F100 A10 		; Slow second dive with more accuracy
              G30			; probe z again
              G29 S1			; Load heightmap and enable mesh grid compensation
              G1 X10 Y10 Z10 F6000	; return head to park position
              M913 X100 Y100 Z100	; Return motor currents to normal
              
              felt342 1 Reply Last reply Reply Quote 1
              • felt342
                felt342 @DIY-O-Sphere last edited by

                @DIY-O-Sphere

                I found hard to screw it in. It sticks out about 0.2mm. I am afraid to break it, is it lock by something?

                DIY-O-Sphere 1 Reply Last reply Reply Quote 0
                • felt342
                  felt342 @Phaedrux last edited by

                  @Phaedrux

                  Thats a smart one! 👍

                  1 Reply Last reply Reply Quote 0
                  • DIY-O-Sphere
                    DIY-O-Sphere @felt342 last edited by DIY-O-Sphere

                    @felt342
                    It seams they have modified the newer ones.
                    The picture of the set screw isn't included in the manual anymore.
                    I have also found a video for the pin replacement on youtube .
                    So I think yes it is locked.

                    1 Reply Last reply Reply Quote 1
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