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Diffstat (limited to 'docs/Measuring_Resonances.md')
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diff --git a/docs/Measuring_Resonances.md b/docs/Measuring_Resonances.md index 557857c4..8b7fed0f 100644 --- a/docs/Measuring_Resonances.md +++ b/docs/Measuring_Resonances.md @@ -357,6 +357,35 @@ If you are doing a shaper re-calibration and the reported smoothing for the suggested shaper configuration is almost the same as what you got during the previous calibration, this step can be skipped. +## Testing custom axes + +`TEST_RESONANCES` command supports custom axes. While this is not really +useful for input shaper calibration, it can be used to study printer +resonances in-depth and to check, for example, belt tension. + +To check the belt tension on CoreXY printers, execute +``` +TEST_RESONANCES AXIS=1,1 OUTPUT=raw_data +TEST_RESONANCES AXIS=1,-1 OUTPUT=raw_data +``` +and use `graph_accelerometer.py` to process the generated files, e.g. +``` +~/klipper/scripts/graph_accelerometer.py -c /tmp/raw_data_axis*.csv -o /tmp/resonances.png +``` +which will generate `/tmp/resonances.png` comparing the resonances. + +For Delta printers with the default tower placement +(tower A ~= 210 degrees, B ~= 330 degrees, and C ~= 90 degrees), execute +``` +TEST_RESONANCES AXIS=0,1 OUTPUT=raw_data +TEST_RESONANCES AXIS=-0.866025404,-0.5 OUTPUT=raw_data +TEST_RESONANCES AXIS=0.866025404,-0.5 OUTPUT=raw_data +``` +and then use the same command +``` +~/klipper/scripts/graph_accelerometer.py -c /tmp/raw_data_axis*.csv -o /tmp/resonances.png +``` +to generate `/tmp/resonances.png` comparing the resonances. # Input Shaper auto-calibration |