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    Input shaping without accelerometer

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    Tuning and tweaking
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    • Adamfilipundefined
      Adamfilip
      last edited by

      Is it possible to calibrate input shaping without an accelerometer

      Can you just print a test tower with different frequency settings and compare results.
      since tests are needed to confirm results what is the main benefit of using accelerometer sensor?

      chrishammundefined CCS86undefined 2 Replies Last reply Reply Quote 0
      • chrishammundefined
        chrishamm administrators @Adamfilip
        last edited by

        @Adamfilip I think it is possible to approximate the ringing frequency by printing a sample, see https://www.klipper3d.org/Resonance_Compensation.html#ringing-frequency

        The main benefit of accelerometer-based tuning is that it is easier. Collected accelerometer data can be used to retrieve the ringing frequencies as well using FFT.

        Duet software engineer

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        • CCS86undefined
          CCS86 @Adamfilip
          last edited by CCS86

          @Adamfilip said in Input shaping without accelerometer:

          Is it possible to calibrate input shaping without an accelerometer

          Can you just print a test tower with different frequency settings and compare results.
          since tests are needed to confirm results what is the main benefit of using accelerometer sensor?

          Absolutely.

          I use custom "after layer change" g-code, in Superslicer, to sweep a range of frequencies:

          {if layer_num < 25}M593 P"none"
          {else}M593 P"MZV" F{15+(layer_num-25)*1.5}
          {endif}

          This will use no IS below layer 25. Then after that will use type:MZV (choose your type), starting with 15 Hz. By changing that 1.5 multiplier (depending on your print height) you can end at a specific frequency.

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