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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>
[NAME=<name>] [FREQ_START=<min_freq>] [FREQ_END=<max_freq>]
[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
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
to run the resonance testing with the input shaper enabled.
`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
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