The purpose of this project is to design an FDM 3d printer controller and keep the cost of that as lowest as possible.
As the most common homemade 3D printers are built with Arduino mega + a RAMP shield + 4 driver modules, the final price is too high.
We can make the cost lower by designing a unified board and remove its useless components.
First, we should find a suitable microcontroller.
| used for | count of pins |
|---|---|
| X-axis stepper controller | 2 |
| Y-axis stepper controller | 2 |
| Z-axis stepper controller | 2 |
| extruder stepper controller | 2 |
| all of XYZ endstops (sensors) | 1 |
| WIFI communication | 2 |
| heated bed activation | 1 |
| heated bed thermistor | 1 |
| hotend thermistor | 1 |
| filament detector | 1 |
| SD card | 4 |
| total | 19 |