Load Cells - Values drifting


My project consists of building a scale for measuring beer keg volumes.

My hardware:

1x nodeMCU - ESP8266 - Arduino
1 x Load combinator bought in Core Electronics
4 x Load cells and 1x HX711 bought in Ali Express

I have connected everything and the nodemcu is connected to my notebook.
I am still building a prototype and the first issue that I a having is that the reading is drifting too much. I am able to calibrate the scale by setting the factor, but values get increasingly going up, sometimes down.
Can you guys give me any clue on what is happening? Can I achieve a much more steady reading? Thank you so much!

Do you have a picture of how you mounted the cells?

The scales I’ve seen with a load cell are pretty sturdy metal frames, and bathroom scales are nearly always glass as it’s the most elastic. Not bendy or springy- elastic.

I’m guessing things are moving a touch from where they were setup hence the changing readings?

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Load cells are just placed on the table and I am using a plywood over on top of them. Please see the pictures.

Thanks for replying.

Just guessing, but I reckon your table could be flexing.

Try putting a support under the table?

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I will try. I let you know. Thanks.

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try double the amount of sensors/cells…scales are hard to preset to “0” at any time…maybe try find a forum who actually deal with these type of setup you have…or places who make scales and see what they have to say…

If you have further questions regarding this type of project please create a new forum post tutorial below.

(Tutorial: https://core-electronics.com.au/how-to-create-forum-topic )