DIY 3D printer
Aluminum V-slot profile:
40x40x400 - 2 pcs. lower base
20x40x360 - 2 pcs. lower base
20x40x400 - 2 pcs. vertical Z-axis
20x20x400 - 2 pcs. under table H-axis
20x20x440 - upper crossbar
20x20x500 - X-beam
The computer cooler is connected via a resistor, as it is rated for 12V, while the printer's power supply is 24V.
A solid-state relay is required for the heating bed, as switching occurs quickly and frequently—a mechanical relay will not cope with this operating mode.
All motors are different: even on the Z-axis, the motors are slightly different, but this does not affect their operation. The pinout of the motors also varies.
These load cells are used in electronic scales. The Arduino module reads the pressure readings from the ADC and, when a certain value is reached, opens an N-channel MOSFET, shorting GND to the signal pin on the printer's motherboard.
Sketch:
https://drive.google.com/drive/folder...
Leave your questions in the comments