This is a mount for the GY-291 ADXL345 accelerometer for use with the Kingroon KP5L. It is mounted using the screw holes for the BL Touch (which you really don't need with the KP5L. Manual Mesh Bed Leveling works great and once you do it the first time you probably won't level your bed again for a very long time.

If you don't know what the GY-291 ADXL345, then you probably need to read up on how to print 3-10x faster with your 3D printer using input shaper. Basically the ADXL345 only costs about $6-$8 and will measure the vibrations of your 3D printer using a few simple tests. Once complete, you will get a set of values that you put in your printer configuration settings.

Using input shaper allows you to take an KP5L (for example) that has a top speed of about 50-80mm/s and print at 200-1000mm/s with high quality.

You can read up more on input shaper at the following link: https://www.klipper3d.org/Measuring_Resonances.html?h=accel

One of the most common and inexpensive accelerometers is the GY-291 ADXL345. It is also the one used in the link above on Klipper's official site. This mount holds the accelerometer in place firmly for very accurate readings.

If you are interested in picking up a GY-291 ADXL345 accelerometer I have provided a few links below. You technically only need one, but I have 4 printers so I bought 5. One is permanently attached to the printer head of each printer, and the extra 5th one I clip to the bed when I measure bed vibration. You don't have to measure resonance often unless you use a broad spectrum of filaments that print at very different temperatures. That is the benefit of having four printers... I print PETG on one printer, then usually have a different color of PLA loaded on to each of the other three printers.

You will also need some M3 nuts and bolts, I suggest just buying an assortment because you will use them on many projects.

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GY-291 ADXL345 Accelerometer on Amazon:
https://amzn.to/4bkBWjE

Metric Bolt and Nut Kit M2, M3, M4, M5:
https://amzn.to/44m64XQ

DuPont Cables to connect the ADXL345 to your Raspberry Pi/Arduino/ESP32:
https://amzn.to/3UDvYVs