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    Solved 3.4b4 and 3.4b5 – issue with sensorless homing

    Beta Firmware
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    • Fred-Y
      Fred-Y last edited by

      Hi,

      I updated today my 2 CoreXY to 3.4b5 from 3.4b3 and immediately noticed that the sensorless homing is not working anymore on both printers.

      I rolled back to 3.4b3, it works; Installed 3.4b4 is doesn’t work.
      I checked the change log for b4 and b5 but I haven’t noticed any changes related this issue; I have also not found any post related

      Configuration:

      • CoreXY
      • Duet 3 6HC + 1LC (v1 on the first printer and v1.1 on the other)
      • Steppers 1.8 on the first printer and .9 on the second
      • both 24v

      Issue:
      When I try to home X or Y it seems the stall detection is triggered immediately – there is no movement in the X or Y max (these 2 printers home on X/Y max).
      I can do a quick video if unclear.

      I have attached the different files that might contain useful details from the printer with the 1.8 steppers.

      config.g
      homex.g

      default-config.g
      sensorless_setting.g

      m122.txt

      I haven’t tried yet to adjust the settings to “fix” the issue, I will likely spend some time later.
      Let me know if there is any adjustments or test you would like me to do.

      Thanks!

      dc42 1 Reply Last reply Reply Quote 0
      • dc42
        dc42 administrators @Fred-Y last edited by

        @fred-y I have one other report of a similar issue. My own CoreXY running 3.4beta5 is working with sensorless homing. I had to increase the M915 S parameter by 1 recently, which I thought was because I changed the control board; however I changed the firmware to 3.4beta5 at about the same time.

        I will investigate whether there was a change between beta4 and beta5.

        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

        Fred-Y 1 Reply Last reply Reply Quote 0
        • Fred-Y
          Fred-Y @dc42 last edited by

          @dc42 Thank you for the prompt response.
          To clarify, the issue started to happen on beta4 and is as well on beta5.

          I did a quick test and I bumped the M915 S parameter gradually from 10 to 60, it didn't make any changed - Same with lower values which makes sense as it increase the sensitivity but I wanted to try.

          I have also increased the current (M913) up to 100 it has not make any difference.

          I even pushed the carriage to "help" and unfortunately the result is the same.

          If I execute a macro with this code

          G91
          G1 X20 F1200 H2
          G1 X-20 H2
          G1 Y20 H2
          G1 Y-20 H2
          G90
          

          each motor moves individually and smoothly.

          dc42 1 Reply Last reply Reply Quote 0
          • dc42
            dc42 administrators @Fred-Y last edited by

            @fred-y please try the new binary at https://www.dropbox.com/sh/xeu30go894p9xbs/AAB5U66SH4wbjKIcX0snUbKxa?dl=0.

            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

            Fred-Y 1 Reply Last reply Reply Quote 0
            • Fred-Y
              Fred-Y @dc42 last edited by

              @dc42 Good news, I loaded this version on my 2 CoreXY and sensorless homing is working like before with the original parameters 🙂

              I will try to run some prints on them today / this weekend and report any issue found.

              1 Reply Last reply Reply Quote 1
              • Fred-Y
                Fred-Y last edited by

                @dc42 I think this topic can be flagged as resolved, I did many small prints today and I have zero issue - Everything worked perfectly!

                Thank you for the prompt fix!

                1 Reply Last reply Reply Quote 0
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