The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

The New Hotness

  • PolyDryer Humidity: November

    The measurements:

    2025-11-042025-11-112025-11-19
    Filament%RH%RHWeight – gWt gain – gGain %%RH
    PETG White393927.42.49.6%23
    PETG Black252626.71.76.8%14
    PETG Orange302326.51.56.0%23
    PETG Blue182327.02.08.0%10
    PETG-CF Blue252526.51.56.0%18
    PETG-CF Black222226.31.35.2%14
    PETG-CF Gray282826.51.56.0%18
    Empty → PETG Clear31n/a26.81.87.2%18
    TPU – Clear282926.31.35.2%14
    W empty → TPU – K232726.81.87.2%18

    All the boxes now have filament spools and 50 g of silica gel divided equally between the humidity meter and the tray in the bottom of the box:

    Polydryer Box desiccant tray - installed
    Polydryer Box desiccant tray – installed

    The PETG White in the first row is the new spool loaded last month. I think the 39 %RH indicates the spools do not necessarily arrive bone-dry in their vacuum-sealed bags with a tiny desiccant packet.

    Conversely, both the PETG Clear and TPU K filaments are new spools that seem reasonably dry out of their bags.

    The auto-rewind spindle in the PETG Orange filament hasn’t been working quite right, so I opened the box a few times. It now has a new PETG-CF spindle.