I have a Safety Height problem with my CNC EleksMill machine (https://www.banggood.com/ru/500mW-Desktop-DIY-CNC-Micro-Laser-Engraving-Machine-Assembling-Kits-p-1055378.html?rmmds=search).
Original Safety Height (3.8mm) helps to prevent your material from the damage and lifts Z axis up before it starts engraving. In my case Z axis goes down and damaged my material.
However, G-code sender shows work position correctly (https://www.youtube.com/watch?v=toxG8fZt-WQ).
I believe that the Z axis works upside down.
Could you please help me with it?