Klippain Shake&Tune module documentation

Resonance testing

First, check out the input shaping and tuning generalities documentation to understand how it all works and what to look for when taking these measurements.

Then look at the documentation for each type of graph by clicking on them below tu run the tests and better understand your results to tune your machine!

Belts graph	Axis input shaper graphs	Vibrations graph

Additional macros

AXES_MAP_CALIBRATION

All graphs generated by this package show plots based on accelerometer measurements, typically labeled with the X, Y, and Z axes. It's important to note that if the accelerometer is rotated, its axes may not align correctly with the machine axes, making the plots more difficult to interpret, analyze, and understand. The AXES_MAP_CALIBRATION is designed to automatically measure the alignement of the accelerometer in order to set it correctly.

Note

:

This misalignment doesn't affect the measurements because the total sum across all axes is used to set the input shaper filters. It's just an optional but convenient way to configure Klipper's [adxl345] (or whichever accelerometer you have) "axes_map" parameter.

Here are the parameters available when calling this macro:

parameters	default value	description
Z_HEIGHT	20	z height to put the toolhead before starting the movements. Be careful, if your accelerometer is mounted under the nozzle, increase it to avoid crashing it on the bed of the machine
SPEED	80	speed of the toolhead in mm/s for the movements
ACCEL	1500 (or max printer accel)	accel in mm/s^2 used for all the moves
TRAVEL_SPEED	120	speed in mm/s used for all the travels moves
ACCEL_CHIP	"adxl345"	accelerometer chip name in the config

The machine will move slightly in +X, +Y, and +Z, and output in the console: Detected axes_map: -z,y,x.

Use this value in your printer.cfg config file:

[adxl345] # replace "adxl345" by your correct accelerometer name
axes_map: -z,y,x

EXCITATE_AXIS_AT_FREQ

The EXCITATE_AXIS_AT_FREQ macro is particularly useful for troubleshooting mechanical vibrations or resonance issues. This macro allows you to maintain a specific excitation frequency for a set duration, enabling hands-on diagnostics. By touching different components during the excitation, you can identify the source of the vibration, as contact usually stops it.