I am trying to create a scale for a 3d printer filament holder that can accurately display the amount of filament left. Currently I am running into an issue where I am running the calibration code that is in the hx711 library, but I cannot get any steady readings from my load cells no matter what calibration coefficient I use. Furthermore I get negative readings randomly throughout with or without weight on the scale. I assume this has to do with noise from my readings, but I cannot figure out how to filter or smooth the data. I added a sample of my data in the attachments, this is with no weight on the scale.
I used this set up:
and I used the hx711.h calibration code. My power supply is through the USB 3.0(I know this might be an issue) on my PC and I am using an arduino nano.
Is there anything you recommend I do?
I appreciate any help you can give me.
-Bford
