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    Starting a Print Sequence

    Tuning and tweaking
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    • Jpmc86
      Jpmc86 last edited by

      Hi all. I’ve been having issues with my delta and the first layer. Seems to always be a hit or miss. I have an FSR probing system.

      My current procedure is, start the printer, heat the bed up to temp and then run auto cal. Once that’s done, heat the nozzle and start print.

      Am I supposed to manually set z=0 via the G92 function at first? I currently never do this and find that sometimes baby steps helps and sometimes it doesn’t.

      Can we post up a step by step procedure of what should be done?

      Thanks!

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      • Jpmc86
        Jpmc86 last edited by

        Do we have to manually tell the printer what z=0 by command when I trap a paper between the bed and the nozzle?

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        • dc42
          dc42 administrators last edited by

          No, if you have set up your FSR probing system correctly, then you can probe just before printing and the firmware will know where Z=0 is. You need to tell the firmware what the trigger height of the Z probe system is in the G31 Z parameter. For FSRs it will be slightly negative, e.g. -0.1 or -0.2mm.

          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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          • Jpmc86
            Jpmc86 @dc42 last edited by

            @dc42 said in Starting a Print Sequence:

            No, if you have set up your FSR probing system correctly, then you can probe just before printing and the firmware will know where Z=0 is. You need to tell the firmware what the trigger height of the Z probe system is in the G31 Z parameter. For FSRs it will be slightly negative, e.g. -0.1 or -0.2mm.

            Thanks David for the clarification. Now should I be doing this when the plate is hot?

            I’ve done this and it seems as if every single time I start a build my nozzle is either too high or too low.

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            • dc42
              dc42 administrators last edited by

              FSRs don't like heat; but if they are sufficiently well insulated from the bed then it is better to probe with the bed hot in case it changes shape.

              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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