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Duet 2 Wifi + BLtouch issues on Ender 5 pro

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  • undefined
    alxndr @mitch
    last edited by 23 Aug 2020, 22:28

    @mitch Thanks for this! i think im pretty much set right now. The only thing im messing with is the bltouch probing points. I'm having a little trouble with that....trying to get 4 points to probe but it keeps telling me it cant reach the points. i basically set start at x10 and end at my limit which is x228.8 but i realize thats for the nozzle...not the bltouch. so im not sure how exactly im supposed to set that.....

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    • undefined
      mitch
      last edited by 24 Aug 2020, 01:12

      @alxndr My direct drive Hemera and BLtouch change the limits. The steps described by @Phaedrux will work. He helped me get up and running when I converted my Ender 5 Pro.

      Just as an example, here is my config. g settings you can see from github:

      ; Axis Limits
      M208 X220 Y207 Z300 S0 ; set axis maxima
      ; Define Mesh
      M557 X0:180 Y40:195 S40 ; define mesh grid

      I have 40mm spacing (S40).

      Total points probed = 20
      4 x 5 grid

      The four corners probed end up being:

      (0,40) (0,160)
      (160,40) (160,160)

      I have been specifying the distance between probe points (S40) but it looks like the P parameter would be more useful as it calculates the distance for you given a specified number of points and a defined limit. I may try to swap over to that method myself.

      undefined 1 Reply Last reply 24 Aug 2020, 01:48 Reply Quote 0
      • undefined
        alxndr @mitch
        last edited by 24 Aug 2020, 01:48

        @mitch just out of curiosity, how and where in comparison to your nozzle is your bltouch mounted?

        undefined 1 Reply Last reply 24 Aug 2020, 02:14 Reply Quote 0
        • undefined
          mitch @alxndr
          last edited by 24 Aug 2020, 02:14

          @alxndr that is also defined in the config.g I posted. It is in the G31 setting for X and Y offsets.

          ; Z-Probe
          M950 S0 C"exp.heater4" ; create servo pin 0 for BLTouch
          M558 P9 C"zprobe.in+zprobe.mod" H5 F120 T6000 ; set Z probe type to bltouch and the dive height + speeds
          G31 P500 X-43 Y3 Z2.0431 ; set Z probe trigger value, offset and trigger height
          M557 X0:180 Y40:195 S40 ; define mesh grid
          undefined 1 Reply Last reply 24 Aug 2020, 02:37 Reply Quote 0
          • undefined
            alxndr @mitch
            last edited by 24 Aug 2020, 02:37

            @mitch I don't get how we have the same printer and yet we have different values for axis limits.

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            • undefined
              mitch
              last edited by mitch 24 Aug 2020, 02:42

              I have a hemera direct drive extruder w/ BLtouch. You have a stock bowden extruder. You just need to go find the limits you have with your BLtouch setup and change the values.

              IMG_20200726_204136 (1).jpg

              undefined 1 Reply Last reply 24 Aug 2020, 22:29 Reply Quote 0
              • undefined
                Phaedrux Moderator
                last edited by 24 Aug 2020, 03:30

                If you want to probe 4 points change your M557 from using S40 which is spacing between points to P4 which is probe 4 points and figure out the spacing automatically.

                Z-Bot CoreXY Build | Thingiverse Profile

                undefined 2 Replies Last reply 24 Aug 2020, 12:11 Reply Quote 0
                • undefined
                  alxndr @Phaedrux
                  last edited by 24 Aug 2020, 12:11

                  @Phaedrux so I did that. But it only probes 3 while saying it can't reach some points.

                  undefined 1 Reply Last reply 25 Aug 2020, 03:38 Reply Quote 0
                  • undefined
                    alxndr @mitch
                    last edited by 24 Aug 2020, 22:29

                    @mitch would you happen to have an example of start and end gcodes that i could look at? im trying to set mine right now. Thanks!

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                    • undefined
                      alxndr @Phaedrux
                      last edited by 25 Aug 2020, 01:22

                      @Phaedrux hey again! would you have any suggestions for start and end gcode? this is probably the very last thing i have to do until i can finally print. thanks!

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                      • undefined
                        Phaedrux Moderator
                        last edited by 25 Aug 2020, 03:36

                        stop.g start.g

                        Z-Bot CoreXY Build | Thingiverse Profile

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                        • undefined
                          Phaedrux Moderator @alxndr
                          last edited by 25 Aug 2020, 03:38

                          @alxndr said in Duet 2 Wifi + BLtouch issues on Ender 5 pro:

                          But it only probes 3 while saying it can't reach some points.

                          Adjust your M557 grid based on your M208 size and your G31 probe offset.

                          If it's saying it can't reach a point, it's because it physically can't get the probe there. So move that point further in where the probe can reach.

                          Z-Bot CoreXY Build | Thingiverse Profile

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