3D Printer Filament Dry Box Dashboard

The default band is below ~15% RH for stored filament (nylon and PA want as dry as possible). Treat it as a sensible starting point — your own specification, regulator, equipment manual or product datasheet sets the authoritative limits, and you can read your true band straight off the worst case those documents allow. Edit the readings against whatever band applies to you.

Telltale signs: popping or hissing at the nozzle, steam wisps, stringing, a rough or bubbly surface, and weaker parts. Yes, you can recover it — dry the spool in a filament dryer or low oven at the material's recommended temperature (e.g. ~45–55 °C for PLA, 70–80 °C for nylon) for several hours, then store it sealed with fresh desiccant. The dashboard's job is to catch the dry box drifting above ~15% RH so you re-charge the desiccant before the filament absorbs enough to print badly.

Match the interval to the consequence and the rate of change: where an excursion spoils product or risks safety, log continuously (or as often as you can sample); where it is merely informative, daily or per-shift spot checks suffice. The in-range % and excursion count only mean something if your sampling is regular — sparse, irregular readings hide the excursions between them.

Yes — every reading is stored in this browser's localStorage on your device and nothing is uploaded to any server, which also makes the dashboard usable on sites with strict data policies. For shared, audit-grade records across a team or for regulatory retention, export the values into your own system.