docs: Align Lists

Signed-off-by: Yifei Ding <yifeiding@protonmail.com>
This commit is contained in:
Yifei Ding 2021-10-23 11:21:46 -07:00 committed by KevinOConnor
parent 46381e03a4
commit ee04a6340a
3 changed files with 88 additions and 88 deletions

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@ -181,10 +181,10 @@ Recv: ok
```
This means that:
- front left screw is the reference point you must not change it.
- front right screw must be turned clockwise 1 full turn and a quarter turn
- rear right screw must be turned counter-clockwise 50 minutes
- read left screw must be turned clockwise 2 minutes (not need it's ok)
- front left screw is the reference point you must not change it.
- front right screw must be turned clockwise 1 full turn and a quarter turn
- rear right screw must be turned counter-clockwise 50 minutes
- read left screw must be turned clockwise 2 minutes (not need it's ok)
Repeat the process several times until you get a good level bed -
normally when all adjustments are below 6 minutes.

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@ -483,15 +483,15 @@ The data can be processed later by the following scripts:
of them accept one or several raw csv files as the input depending on the
mode. The graph_accelerometer.py script supports several modes of operation:
* plotting raw accelerometer data (use `-r` parameter), only 1 input is
* plotting raw accelerometer data (use `-r` parameter), only 1 input is
supported;
* plotting a frequency response (no extra parameters required), if multiple
* plotting a frequency response (no extra parameters required), if multiple
inputs are specified, the average frequency response is computed;
* comparison of the frequency response between several inputs (use `-c`
* comparison of the frequency response between several inputs (use `-c`
parameter); you can additionally specify which accelerometer axis to
consider via `-a x`, `-a y` or `-a z` parameter (if none specified,
the sum of vibrations for all axes is used);
* plotting the spectrogram (use `-s` parameter), only 1 input is supported;
* plotting the spectrogram (use `-s` parameter), only 1 input is supported;
you can additionally specify which accelerometer axis to consider via
`-a x`, `-a y` or `-a z` parameter (if none specified, the sum of vibrations
for all axes is used).
@ -515,16 +515,16 @@ the CSV file if `-c output.csv` parameter is specified.
Providing several inputs to shaper_calibrate.py script can be useful if running
some advanced tuning of the input shapers, for example:
* Running `TEST_RESONANCES AXIS=X OUTPUT=raw_data` (and `Y` axis) for a single
* Running `TEST_RESONANCES AXIS=X OUTPUT=raw_data` (and `Y` axis) for a single
axis twice on a bed slinger printer with the accelerometer attached to the
toolhead the first time, and the accelerometer attached to the bed the
second time in order to detect axes cross-resonances and attempt to cancel
them with input shapers.
* Running `TEST_RESONANCES AXIS=Y OUTPUT=raw_data` twice on a bed slinger with
* Running `TEST_RESONANCES AXIS=Y OUTPUT=raw_data` twice on a bed slinger with
a glass bed and a magnetic surfaces (which is lighter) to find the input
shaper parameters that work well for any print surface configuration.
* Combining the resonance data from multiple test points.
* Combining the resonance data from 2 axis (e.g. on a bed slinger printer
* Combining the resonance data from multiple test points.
* Combining the resonance data from 2 axis (e.g. on a bed slinger printer
to configure X-axis input_shaper from both X and Y axes resonances to
cancel vibrations of the *bed* in case the nozzle 'catches' a print when
moving in X axis direction).

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@ -30,13 +30,13 @@ adding a few parameters to `printer.cfg` file.
Slice the ringing test model, which can be found in
[docs/prints/ringing_tower.stl](prints/ringing_tower.stl), in the slicer:
* Suggested layer height is 0.2 or 0.25 mm.
* Infill and top layers can be set to 0.
* Use 1-2 perimeters, or even better the smooth vase mode with 1-2 mm base.
* Use sufficiently high speed, around 80-100 mm/sec, for **external** perimeters.
* Make sure that the minimum layer time is **at most** 3 seconds.
* Make sure any "dynamic acceleration control" is disabled in the slicer.
* Do not turn the model. The model has X and Y marks at the back of the model.
* Suggested layer height is 0.2 or 0.25 mm.
* Infill and top layers can be set to 0.
* Use 1-2 perimeters, or even better the smooth vase mode with 1-2 mm base.
* Use sufficiently high speed, around 80-100 mm/sec, for **external** perimeters.
* Make sure that the minimum layer time is **at most** 3 seconds.
* Make sure any "dynamic acceleration control" is disabled in the slicer.
* Do not turn the model. The model has X and Y marks at the back of the model.
Note the unusual location of the marks vs. the axes of the printer - it is
not a mistake. The marks can be used later in the tuning process as a
reference, because they show which axis the measurements correspond to.
@ -116,12 +116,12 @@ Note that the ringing frequencies can change if the changes are made to the
printer that affect the moving mass or change the stiffness of the system,
for example:
* Some tools are installed, removed or replaced on the toolhead that change
* Some tools are installed, removed or replaced on the toolhead that change
its mass, e.g. a new (heavier or lighter) stepper motor for direct extruder
or a new hotend is installed, heavy fan with a duct is added, etc.
* Belts are tightened.
* Some addons to increase frame rigidity are installed.
* Different bed is installed on a bed-slinger printer, or glass added, etc.
* Belts are tightened.
* Some addons to increase frame rigidity are installed.
* Different bed is installed on a bed-slinger printer, or glass added, etc.
If such changes are made, it is a good idea to at least measure the ringing
frequencies to see if they have changed.
@ -187,12 +187,12 @@ shaper_type: mzv
A few notes on shaper selection:
* EI shaper may be more suited for bed slinger printers (if the resonance
* EI shaper may be more suited for bed slinger printers (if the resonance
frequency and resulting smoothing allows): as more filament is deposited
on the moving bed, the mass of the bed increases and the resonance frequency
will decrease. Since EI shaper is more robust to resonance frequency
changes, it may work better when printing large parts.
* Due to the nature of delta kinematics, resonance frequencies can differ a
* Due to the nature of delta kinematics, resonance frequencies can differ a
lot in different parts of the build volume. Therefore, EI shaper can be a
better fit for delta printers rather than MZV or ZV, and should be
considered for the use. If the resonance frequency is sufficiently large
@ -292,9 +292,9 @@ to 7000 already, complete the following steps for each of the axes X and Y:
6. Print the test model.
7. Reset the original frequency value:
`SET_INPUT_SHAPER SHAPER_FREQ_X=...`.
7. Find the band which shows ringing the least and count its number from the
8. Find the band which shows ringing the least and count its number from the
bottom starting at 1.
8. Calculate the new shaper_freq_x value via old
9. Calculate the new shaper_freq_x value via old
shaper_freq_x * (39 + 5 * #band-number) / 66.
Repeat these steps for the Y axis in the same manner, replacing references to X
@ -371,9 +371,9 @@ with 50 Hz.
Now check if EI shaper would be good enough in your case. Choose EI shaper
frequency based on the frequency of 2HUMP_EI shaper you chose:
* For 2HUMP_EI 60 Hz shaper, use EI shaper with shaper_freq = 50 Hz.
* For 2HUMP_EI 50 Hz shaper, use EI shaper with shaper_freq = 40 Hz.
* For 2HUMP_EI 40 Hz shaper, use EI shaper with shaper_freq = 33 Hz.
* For 2HUMP_EI 60 Hz shaper, use EI shaper with shaper_freq = 50 Hz.
* For 2HUMP_EI 50 Hz shaper, use EI shaper with shaper_freq = 40 Hz.
* For 2HUMP_EI 40 Hz shaper, use EI shaper with shaper_freq = 33 Hz.
Now print the test model one more time, running
@ -481,18 +481,18 @@ so the values for 10% vibration tolerance are provided only for the reference.
**How to use this table:**
* Shaper duration affects the smoothing in parts - the larger it is, the more
* Shaper duration affects the smoothing in parts - the larger it is, the more
smooth the parts are. This dependency is not linear, but can give a sense of
which shapers 'smooth' more for the same frequency. The ordering by
smoothing is like this: ZV < MZV < ZVD EI < 2HUMP_EI < 3HUMP_EI. Also,
it is rarely practical to set shaper_freq = resonance freq for shapers
2HUMP_EI and 3HUMP_EI (they should be used to reduce vibrations for several
frequencies).
* One can estimate a range of frequencies in which the shaper reduces
* One can estimate a range of frequencies in which the shaper reduces
vibrations. For example, MZV with shaper_freq = 35 Hz reduces vibrations
to 5% for frequencies [33.6, 36.4] Hz. 3HUMP_EI with shaper_freq = 50 Hz
reduces vibrations to 5% in range [27.5, 75] Hz.
* One can use this table to check which shaper they should be using if they
* One can use this table to check which shaper they should be using if they
need to reduce vibrations at several frequencies. For example, if one has
resonances at 35 Hz and 60 Hz on the same axis: a) EI shaper needs to have
shaper_freq = 35 / (1 - 0.2) = 43.75 Hz, and it will reduce resonances
@ -503,7 +503,7 @@ so the values for 10% vibration tolerance are provided only for the reference.
for a given shaper (perhaps with some safety margin, so in this example
shaper_freq ≈ 50-52 Hz would work best), and try to use a shaper with as
small shaper duration as possible.
* If one needs to reduce vibrations at several very different frequencies
* If one needs to reduce vibrations at several very different frequencies
(say, 30 Hz and 100 Hz), they may see that the table above does not provide
enough information. In this case one may have more luck with
[scripts/graph_shaper.py](../scripts/graph_shaper.py)