are installed inside the build chamber.
Every axis is equipped with a Hall effect sensor
and a magnet for accurate home positioning. If
the Hall effect sensor nears the magnet and
measures the defined threshold value of the
magnetic field strength, the sensor effects a
“stop” signal via the microcontroller. After all
sensors have given this signal the moving axes
are in home position. The home position is the
reference value for all relative movement of the
extruder head and the print bed.
Hall effect sensor and magnet of the X-axis.
Hall effect sensor and magnet of the Y-axis.
Hall effect sensor and magnet of the Z-axis.
Thermistors measure the relevant temperatures
for the printing process, i.e. the print bed
temperature and the build chamber
temperature. All thermistors deliver their input
signal to the microcontroller and thus effect
switching on and off the according heating
resistor.
The print bed temperature is measured directly
at the heating pad with which it is looped in a
