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    Can't get stall detection to work on my delta.

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    • dascvcsadcundefined
      dascvcsadc
      last edited by

      I cannot find a proper S value for my steppers on a delta printer for M915 command. I've tried to lower both acceleration and jerk values to quite low values(400-500 mm*s2). If I use S3 and H400, I get a lot of false positive alarms. If I use S4-5, then i still get false positive alarms occasionally, but never get an alarm if I hold any axis by hand, so it would really skip steps. I don't get any alarms with S6. I use low inductance high current motors - 2.4A, inductance 1.8mH/phase, resistance 0.8Ohm/phase. Is it possible at all to calibrate stall detection with these motors?

      jay_s_ukundefined 1 Reply Last reply Reply Quote 0
      • Phaedruxundefined
        Phaedrux Moderator
        last edited by

        All I can suggest is to use a higher movement speed and lower acceleration. That might get the motors into a range to detect the stall from backemf better and still avoid the false positives with smoother acceleration.

        Z-Bot CoreXY Build | Thingiverse Profile

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

          @dascvcsadc are you running 12v or 24v? I've found it works better with 24v

          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

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          • dascvcsadcundefined
            dascvcsadc @Phaedrux
            last edited by

            @phaedrux
            Thanks, will try that later.
            I'm running 24v.

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