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docs: Updated docs for custom AXIS in TEST_RESONANCES

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Signed-off-by: Dmitry Butyugin <dmbutyugin@google.com>
This commit is contained in:
Dmitry Butyugin
2021-06-27 17:40:14 +02:00
committed by KevinOConnor
parent 1128e9179b
commit 2ef5e03ce4
2 changed files with 35 additions and 2 deletions
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29
docs/Measuring_Resonances.md
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@@ -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