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    Yet another BLtouch problem

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    • Phaedruxundefined
      Phaedrux Moderator
      last edited by

      It sounds like you just need to update your homeall to use a G30 to use the probe instead of a G1 H1 Z move to use an endstop.

      Z-Bot CoreXY Build | Thingiverse Profile

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      • danzaywerundefined
        danzaywer @Macgyver
        last edited by

        @macgyver
        If you want to use probe as endstop then you have to set

        M574 Z1 S2                               						    ; Set endstops controlled by probe
        

        and use G30 instead of G1 H1 as @Phaedrux said

        engikeneerundefined 1 Reply Last reply Reply Quote 0
        • engikeneerundefined
          engikeneer @danzaywer
          last edited by

          @danzaywer
          You don't need the M574 line in there. I think the config generator just puts that line in by default but it's not needed (and may actually mean something else if you dig in the docs...)

          @Macgyver Just make sure your homing files have a G30 command in like @Phaedrux said

          E3D TC with D3Mini and Toolboards.
          Home-built CoreXY, Duet Wifi, Chimera direct drive, 2x BMG, 300x300x300 build volume
          i3 clone with a bunch of mods

          danzaywerundefined 1 Reply Last reply Reply Quote 2
          • danzaywerundefined
            danzaywer @engikeneer
            last edited by

            @engikeneer said in Yet another BLtouch problem:

            You don't need the M574 line in there. I think the config generator just puts that line in by default but it's not needed (and may actually mean something else if you dig in the docs...)

            So can it be omitted?

            engikeneerundefined 1 Reply Last reply Reply Quote 0
            • engikeneerundefined
              engikeneer @danzaywer
              last edited by

              @danzaywer yes, from the docs for M574 in RRF3:

              SnnnĀ 1 = switch-type (eg microswitch) endstop input, 2 = Z probe (when used to home an axis other than Z), 3 = single motor load detection, 4 = multiple motor load detection (see Notes).

              I think the intended use of the S2 parameter would be to set your x or y axis to use the z probe as an endstop (like the ormerod printer does). Don't think it does any harm though as it is, which is why it hasn't been taken out from the config tool (though it has caused some confusion for a few people.on here!)

              E3D TC with D3Mini and Toolboards.
              Home-built CoreXY, Duet Wifi, Chimera direct drive, 2x BMG, 300x300x300 build volume
              i3 clone with a bunch of mods

              dc42undefined 1 Reply Last reply Reply Quote 1
              • dc42undefined
                dc42 administrators @engikeneer
                last edited by

                @engikeneer said in Yet another BLtouch problem:

                I think the intended use of the S2 parameter would be to set your x or y axis to use the z probe as an endstop (like the ormerod printer does).

                That's correct.

                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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                • Macgyverundefined
                  Macgyver
                  last edited by

                  Hi Guys

                  Sorry for going AWOL on this, unfortunately got Covid but finally back in the office and back on this machine.

                  Going to work through it and update it shortly.

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                  • Macgyverundefined
                    Macgyver
                    last edited by

                    So after much trying to figure out what's going on with this machine, turns out had a weak spot in one of the ground lines in my BLtouch, It would work sometimes and randomly just not trigger. Ran 5 new lines all from the BLtouch through the drag chain to the mainboard (about 17 ft) and now its working 100% predictability.

                    Just going to post my configuration here in case others want something to ref that is working. All this is done on RRF 3

                    Config .g file

                    ; Configuration file for Duet WiFi (firmware version 3)
                    ; executed by the firmware on start-up
                    ;
                    ; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Mar 02 2021 18:05:15 GMT-0500 (Eastern Standard Time)

                    ; Endstops
                    M574 X1 S1 P"!xstop" ; configure active-high endstop for low end on X via pin !xstop
                    M574 Y1 S1 P"!ystop" ; configure active-high endstop for low end on Y via pin !ystop

                    ; Z-Probe
                    M950 S0 C"exp.8" ; Assign GPIO port 0 to Heater3/Pin8 on exp conn, Servo Mode
                    M558 P9 C"^zprobe.in" H5 F120 T6000 ; set Z probe type to 9 BL Touch and the dive height + speeds
                    G31 P500 X0 Y0 Z6.3 ; set Z probe trigger value, offset and trigger height
                    M557 X15:585 Y15:585 S28.5 ; define mesh grid


                    ; deployprobe.g
                    ; called to deploy a physical Z probe
                    M280 P0 S10


                    ; homeall.g
                    ; called to home all axes
                    ;
                    ; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Mar 02 2021 18:05:15 GMT-0500 (Eastern Standard Time)
                    G91 ; relative positioning
                    G1 H2 Z5 F6000 ; lift Z relative to current position
                    G1 H1 X-605 Y-605 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
                    G1 H2 X5 Y5 F6000 ; go back a few mm
                    G1 H1 X-605 Y-605 F360 ; move slowly to X and Y axis endstops once more (second pass)
                    G30
                    G90 ; absolute positioning
                    G92 Z0 ; set Z position to axis minimum (you may want to adjust this)


                    ; homez.g
                    ; called to home the Z axis
                    ;
                    ; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Mar 02 2021 18:05:15 GMT-0500 (Eastern Standard Time)
                    G91 ; relative positioning
                    G1 H2 Z5 F6000 ; lift Z relative to current position
                    G30
                    G92 Z0 ; set Z position to axis minimum (you may want to adjust this)

                    Phaedruxundefined 1 Reply Last reply Reply Quote 2
                    • Phaedruxundefined
                      Phaedrux Moderator @Macgyver
                      last edited by

                      @macgyver said in Yet another BLtouch problem:

                      ; homez.g
                      ; called to home the Z axis
                      ;
                      ; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Mar 02 2021 18:05:15 GMT-0500 (Eastern Standard Time)
                      G91 ; relative positioning
                      G1 H2 Z5 F6000 ; lift Z relative to current position
                      G30
                      G92 Z0 ; set Z position to axis minimum (you may want to adjust this)

                      Are you sure you want to force the Z position to zero AFTER using the probe to set the actual offset?

                      Z-Bot CoreXY Build | Thingiverse Profile

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                      • Macgyverundefined
                        Macgyver
                        last edited by

                        Actually a good point, I missed that,

                        Not sure where that one came from

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                        • Macgyverundefined
                          Macgyver
                          last edited by

                          you can mark this thread as solved, Hopefully, someone else can find it and make use of the information.

                          Thanks again for your help guys Truly appreciate it.

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                          • Phaedruxundefined Phaedrux marked this topic as a question
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