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docs: Updated docs for custom AXIS in TEST_RESONANCES 

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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8
docs/G-Codes.md
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@ -755,9 +755,13 @@ is enabled (also see the
- `TEST_RESONANCES AXIS=<axis> OUTPUT=<resonances,raw_data> - `TEST_RESONANCES AXIS=<axis> OUTPUT=<resonances,raw_data>
[NAME=<name>] [FREQ_START=<min_freq>] [FREQ_END=<max_freq>] [NAME=<name>] [FREQ_START=<min_freq>] [FREQ_END=<max_freq>]
[HZ_PER_SEC=<hz_per_sec>] [INPUT_SHAPING=[<0:1>]]`: Runs the resonance [HZ_PER_SEC=<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 <axis>
and measures the acceleration using the accelerometer chips configured 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. <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 disables input shaping for the resonance testing, because it is not valid
to run the resonance testing with the input shaper enabled. to run the resonance testing with the input shaper enabled.
`OUTPUT` parameter is a comma-separated list of which outputs will be `OUTPUT` parameter is a comma-separated list of which outputs will be

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 suggested shaper configuration is almost the same as what you got during the
previous calibration, this step can be skipped. 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 # Input Shaper auto-calibration