I have just finished building a makibox printer (new model with black pcb). I am running repetier-host on windows 10. Everything works as it should but when you start an actual print the hotbed crashes into the extruder. There must be some form of calibrating the Z axis but i cannot find how.

Can anyone help me please

Z endstop

Does this help? #MakiBox A6 - First Setup and Print Walkthrough - YouTube