When tuning a 3D printer like the Creality Ender 3, homing and leveling the Z axis can be a challenge. Unlike the X and Y axes, which can be measured without a sensor, the Z axis requires a load cell as a sensor. This is because the threaded spindles of the axle drive make it difficult for the motor driver ICs on the printer’s mainboard to notice a blockage caused by the nozzle tip touching the printing plate.
To accurately home and level the Z axis, it is important to use the print nozzle tip as a reference point. A load cell can be used as a sensor to ensure that the pressure platform is not pushed down too far in its springy mounting, or that the pressure plate or hotend is not damaged.
It is also important to pay attention to cable routing when tuning a 3D printer. Adapting the printer firmware and implementing a double-spindle drive for the Z-axis can also help improve performance.
In addition to these tips, it is also helpful to switch the HX711 to 80 Hz. More information on tuning the 3D printer can be found in Make Magazine 2/2023.
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