Filament spool scale HX711

drronnie85 · November 1, 2024, 4:42pm

Hi!
I am newbie in Klipper. Move first Anycubic Kobra 2 to Klipper.

At manual Configuration reference - Klipper documentation specified “This is a 24 bit low sample rate chip using “bit-bang” communications. It is suitable for filament scales.”
I print Filament Holder 85mm, includes Scale with HX711, Raspberry Octoprint, compatible with Filler System by DasMani01 - Thingiverse, connect HX711 to external MCU, add load_cell to config…
How I can calibrate, tare my scale and see weight of filament spool in web interface or in KlipperScreen?
Thank you

garethky · November 4, 2024, 10:55pm

I’m about to do the PR for the weigh scale features. Hang tight, it’s on the way. Just have to validate that I’ve squashed the last few bugs people have reported.

drronnie85 · November 12, 2024, 9:42pm

Good news. Please give me a link to pull request.
Thank you.

garethky · November 13, 2024, 12:13am

github.com/Klipper3d/klipper

Load cell gram scale

Klipper3d:master ← garethky:pr-load-cell-gram-scale

opened 05:37AM - 05 Nov 24 UTC

garethky

+701 -2

This PR adds the features needed to make a load cell actually work as a gram sca…le. This PR will let you weight filament or measure a force in grams. (no homing or probing yet!) * Convert raw sensor `counts` to grams and make this force data available via unix socket and printer object status * Track sensor calibration state and allow sensors to go from un-calibrated to calibrated at runtime * Add basic GCodes for tearing and reading the load cell * Add a guided calibration tool so users can calibrate a load cell with a known mass or measured force. * Add diagnostic GCode to check the health and performance of the load cell and sensor This code has been tested by several people in the community and some last minute bug fixes and changes were landed: * The `reverse` option allows the polarity of the force readings to be inverted. You can have your probing collision graphs in either orientation now. * `reference_tare_counts` is written to config and read as an integer. [link](https://github.com/garethky/klipper/pull/3) * Fixed crash when guided calibration tool being entered twice * Fixed crash when `CALIBRATE` was used before `TARE` A lot of work (months) and bug fixing went into parts of this, particularly `LOAD_CELL_DIAGNOSTIC` and the `LoadCellSampleCollector`. These bits have to work when the sensor is buggy and still produce usable output. `LoadCellSampleCollector` also underpins later work for probing. `numpy` is required for this PR. We could change that. But PR's for probing will absolutely need it. If you want to merge `[load_cell]` and `[load_cell_probe]` then it seems there is no point in trying to keep it out of this PR.

Topic		Replies	Views
Testing request: load cell homing/probing + hx711 adc #6018 Developers	8	1397	April 11, 2023
HX711 support (load cell sensor) Developers	24	6067	July 27, 2023
PR: introduce load cell-based probe Developers	3	1083	July 4, 2022
Strain Gauge/Load Cell based Endstops Developers	461	35019	December 16, 2024
Auto leveling with weight sensor.Tare signal General Discussion	2	777	November 29, 2021

Filament spool scale HX711

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