The mainboard

From the top to bottom the connectors are:

On the left:

- USB,

- extruder heater,

- extruder fan,

- extruder temperature sensor

- Feeder stepper

- Gamma axis stepper

- βeta axis stepper

- αlpha axis stepper

 

On the right:

- Power jack

- SD connector

- αlpha axis limit switch

- βeta axis limit switch

- Gamma axis limit switch

Done