Filament Spool Scale
thingiverse
Having a scale integrated into your spool holder is an innovative concept. I came across several posts discussing the implementation of a load cell and HX711 amplifier to measure spool weights, as well as this article featuring an Octoprint plugin: https://hackaday.com/2018/08/10/3d-printers-get-a-fuel-gauge-adding-a-filament-scale-to-octoprint/. I sought out a mount that would be compatible with a Delta Printer - utilizing 2040 linear extrusion and also provide a convenient mounting option for a reference weight, specifically a 100 gram calibration weight. 1. KNACRO HX711 amplifier + 5 kg load cell (4x M4 button screws - two at the top and two at the bottom (most likely that most of the HX711 on Amazon are identical). 2. American Weigh Scales 100g OIML Class M2 Calibration Weight 3. Ensure to tap the holes carefully and avoid over-tightening, as the holes are recessed to provide clearance for standard 1kg filament spools. 4. There is a notch in the back for the wires - so if you sleeve them, leave a gap; there should be ample clearance for the cable.
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