From 2ef5e03ce4dd132d56a811885eda5681f358106d Mon Sep 17 00:00:00 2001 From: Dmitry Butyugin Date: Sun, 27 Jun 2021 17:40:14 +0200 Subject: [PATCH] docs: Updated docs for custom AXIS in TEST_RESONANCES Signed-off-by: Dmitry Butyugin --- docs/G-Codes.md | 8 ++++++-- docs/Measuring_Resonances.md | 29 +++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+), 2 deletions(-) diff --git a/docs/G-Codes.md b/docs/G-Codes.md index 026b93ec..37e363f4 100644 --- a/docs/G-Codes.md +++ b/docs/G-Codes.md @@ -755,9 +755,13 @@ is enabled (also see the - `TEST_RESONANCES AXIS= OUTPUT= [NAME=] [FREQ_START=] [FREQ_END=] [HZ_PER_SEC=] [INPUT_SHAPING=[<0:1>]]`: Runs the resonance - test in all configured probe points for the requested axis (X or Y) + test in all configured probe points for the requested and measures the acceleration using the accelerometer chips configured - for the respective axis. If `INPUT_SHAPING=0` or not set (default), + for the respective axis. can either be X or Y, or specify an + arbitrary direction as `AXIS=dx,dy`, where dx and dy are floating point + numbers defining a direction vector (e.g. `AXIS=X`, `AXIS=Y`, or + `AXIS=1,-1` to define a diagonal direction). Note that `AXIS=dx,dy` and + `AXIS=-dx,-dy` is equivalent. If `INPUT_SHAPING=0` or not set (default), disables input shaping for the resonance testing, because it is not valid to run the resonance testing with the input shaper enabled. `OUTPUT` parameter is a comma-separated list of which outputs will be 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