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    Best probing speed for IR sensor?

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    IR Height Sensor
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    • o_lampeundefined
      o_lampe
      last edited by

      Hi all,
      I read many posts here, searching for the ultimate probe speed setting. But everyone uses F120 T6000 (coming from config tool?)
      I'm probing at 100 points, twice per position. That takes a lot of time. I tried to reduce dive height too, but there is the risk of probe already triggered
      Even on dc42s worldpress page I couldn't find a hint.

      dc42undefined 1 Reply Last reply Reply Quote 0
      • dc42undefined
        dc42 administrators @o_lampe
        last edited by dc42

        @o_lampe if you use the probe in analog mode then there is a potential jitter of 1ms in the reading. So you should choose the probing speed to make the jitter acceptable. For example, if you choose 10mm/sec (F600 in the M558 command), then 1ms jitter equates to 1ms * 5 mm/sec = 0.01mm jitter in the measured height.

        If you use it in digital mode instead then the jitter is reduced to 0.5ms and you can use faster speeds, e.g. 20mm/sec (F1200) for 0.01mm jitter in the result.

        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

        o_lampeundefined 1 Reply Last reply Reply Quote 1
        • o_lampeundefined
          o_lampe @dc42
          last edited by

          @dc42 That's more like it! I made a video of the whole homing and probing sequence: Eat this BLTouch 😉

          jay_s_ukundefined 1 Reply Last reply Reply Quote 0
          • jay_s_ukundefined
            jay_s_uk @o_lampe
            last edited by

            @o_lampe is that using the F407 or the super8?

            Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is

            o_lampeundefined 1 Reply Last reply Reply Quote 0
            • o_lampeundefined
              o_lampe @jay_s_uk
              last edited by

              @jay_s_uk It's the super8.
              24000mm/s travel speed is not the end. Could go faster, but that's not the goal of the hashPrinter test rig.

              1 Reply Last reply Reply Quote 1
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