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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/Config_Changes.md | 8 | ||||
| -rw-r--r-- | docs/Config_Reference.md | 12 | ||||
| -rw-r--r-- | docs/Measuring_Resonances.md | 18 |
3 files changed, 37 insertions, 1 deletions
diff --git a/docs/Config_Changes.md b/docs/Config_Changes.md index ecac5a7a..a73a0c37 100644 --- a/docs/Config_Changes.md +++ b/docs/Config_Changes.md @@ -8,6 +8,14 @@ All dates in this document are approximate. ## Changes +20241203: The resonance test has been changed to include slow sweeping +moves. This change requires that testing point(s) have some clearance +in X/Y plane (+/- 30 mm from the test point should suffice when using +the default settings). The new test should generally produce more +accurate and reliable test results. However, if required, the previous +test behavior can be restored by adding options `sweeping_period: 0` and +`accel_per_hz: 75` to the `[resonance_tester]` config section. + 20241201: In some cases Klipper may have ignored leading characters or spaces in a traditional G-Code command. For example, "99M123" may have been interpreted as "M123" and "M 321" may have been interpreted as diff --git a/docs/Config_Reference.md b/docs/Config_Reference.md index 6a5a7582..5d85e483 100644 --- a/docs/Config_Reference.md +++ b/docs/Config_Reference.md @@ -1790,11 +1790,14 @@ section of the measuring resonances guide for more information on # auto-calibration (with 'SHAPER_CALIBRATE' command). By default no # maximum smoothing is specified. Refer to Measuring_Resonances guide # for more details on using this feature. +#move_speed: 50 +# The speed (in mm/s) to move the toolhead to and between test points +# during the calibration. The default is 50. #min_freq: 5 # Minimum frequency to test for resonances. The default is 5 Hz. #max_freq: 133.33 # Maximum frequency to test for resonances. The default is 133.33 Hz. -#accel_per_hz: 75 +#accel_per_hz: 60 # This parameter is used to determine which acceleration to use to # test a specific frequency: accel = accel_per_hz * freq. Higher the # value, the higher is the energy of the oscillations. Can be set to @@ -1808,6 +1811,13 @@ section of the measuring resonances guide for more information on # hz_per_sec. Small values make the test slow, and the large values # will decrease the precision of the test. The default value is 1.0 # (Hz/sec == sec^-2). +#sweeping_accel: 400 +# An acceleration of slow sweeping moves. The default is 400 mm/sec^2. +#sweeping_period: 1.2 +# A period of slow sweeping moves. Setting this parameter to 0 +# disables slow sweeping moves. Avoid setting it to a too small +# non-zero value in order to not poison the measurements. +# The default is 1.2 sec which is a good all-round choice. ``` ## Config file helpers diff --git a/docs/Measuring_Resonances.md b/docs/Measuring_Resonances.md index 6c58409b..d6aaf567 100644 --- a/docs/Measuring_Resonances.md +++ b/docs/Measuring_Resonances.md @@ -694,6 +694,24 @@ 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. +### Unreliable measurements of resonance frequencies + +Sometimes the resonance measurements can produce bogus results, leading to +the incorrect suggestions for the input shapers. This can be caused by a +variety of reasons, including running fans on the toolhead, incorrect +position or non-rigid mounting of the accelerometer, or mechanical problems +such as loose belts or binding or bumpy axis. Keep in mind that all fans +should be disabled for resonance testing, especially the noisy ones, and +that the accelerometer should be rigidly mounted on the corresponding +moving part (e.g. on the bed itself for the bed slinger, or on the extruder +of the printer itself and not the carriage, and some people get better +results by mounting the accelerometer on the nozzle itself). As for +mechanical problems, the user should inspect if there is any fault that +can be fixed with a moving axis (e.g. linear guide rails cleaned up and +lubricated and V-slot wheels tension adjusted correctly). If none of that +helps, a user may try the other shapers from the produced list besides the +one recommended by default. + ### Testing custom axes `TEST_RESONANCES` command supports custom axes. While this is not really |