To [measure the resonance for the klipper](https://www.klipper3d.org/Measuring_Resonances.html) resonance compensation, you need a RaspberryPi + an [ADXL345](https://www.analog.com/en/products/adxl345.html) which needs to be mounted to the toolhead.
I've switched from the original Qidi Extruders to [humebeam](https://www.thingiverse.com/humebeam)'s [Icarus 2.1](https://www.thingiverse.com/thing:4968938) due to massive problems with the print quality. This switch also allowed me to add various measurement devices (like a dial gauge) to the front of the toolhead. Only a new adapter had to be designed to mount the ADXL345 firmly in place. It follows the same principles as the original dial gauge holder
Additional materials required:
* 2x M3x6/8 screws for the ADXL345 * 2x M3 nuts for the ADXL345 * 1x M3x20 screw for icarus holder (can be a little bit more or less in length) * 1x M3 insert ([ruthex](https://www.ruthex.de/collections/gewindeeinsatze/products/ruthex-gewindeeinsatz-m3-100-stuck-rx-m3x5-7-messing-gewindebuchsen)/[CNC kitchen](https://www.cnckitchen.com/shop#!/Gewindeeinsatz-threaded-insert-M3-Standard-100-Stk-pcs/p/431146823/) recommended)
It is not recommended to leave the ADXL345 (and this adapter) on the Icarus after finishing the resonance measurement. Otherwise there is a chance to collide with camera mounts or similar things.