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    Solved During mesh routine, bed heater disabled during movement?

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    • kb58
      kb58 last edited by kb58

      The bed and extruder heaters were allowed to reach 60C and 205C, respectively. G29 S0 was then commanded to start testing the bed to develop a profile map. It was running fine, but part way through I noticed that extruder temperature was dropping off even though the heater was enabled and the 205C target was unchanged. Watching the bed heater output LED on the 6HC board, I noticed that it was also action odd, only lighting while the nozzle was in motion. Because of this, the average temperature was dropping way below the commanded set point.

      I almost want to say that this could be a bug, but if no one else is seeing this, I'm mystified about what's going on. As said above, only G29 S0 was commanded, and G29 says nothing about disabling the bed heater, nor would it be expected to. Any ideas?

      Scratch-built 350mmx350mm coreXY, linear rails, ballscrews, 3 Z axis, Duet3 6HC, v3.3, Tool Board v1.1, BondTech LGX + Mosquito hot end

      fcwilt 1 Reply Last reply Reply Quote 0
      • fcwilt
        fcwilt @kb58 last edited by

        @kb58

        Check your M558 command for a B parameter.

        From the M558 docs:

        Bn If 1, turn off all heaters while probing, default (B0) leaves heaters on. (RepRapFirmware 1.21 and later)

        Frederick

        Printers: A FT-5 with the 713 upgrade bits. A custom MarkForged style. A small Utilmaker style and a CoreXY from kits. Various hotends. Using Duets (2 and 3) running 3.4.1

        kb58 1 Reply Last reply Reply Quote 2
        • kb58
          kb58 @fcwilt last edited by kb58

          @fcwilt Oh good lord... Yet another example of brainlessly copying code from who knows where without fully understanding each parameter. Yes, indeed: M558 P9 C"121.io0.in" F100 H5 R0.2 T6000 A5 B1

          Thanks you, Frederick, again.

          Edit: This is related to another thread I started, where I was puzzling how the heaters were disabled as the nozzle moved to the print start point. Another light has gone on.

          Scratch-built 350mmx350mm coreXY, linear rails, ballscrews, 3 Z axis, Duet3 6HC, v3.3, Tool Board v1.1, BondTech LGX + Mosquito hot end

          fcwilt 1 Reply Last reply Reply Quote 1
          • fcwilt
            fcwilt @kb58 last edited by

            @kb58

            Always glad to help when I can.

            Frederick

            Printers: A FT-5 with the 713 upgrade bits. A custom MarkForged style. A small Utilmaker style and a CoreXY from kits. Various hotends. Using Duets (2 and 3) running 3.4.1

            1 Reply Last reply Reply Quote 0
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