I apologize if I sound like a noob, but that's precisely what I am! I just built my first CNC Plasma Table & everything is going fairly well so far. There have been hurdles, but there's a lot of info I've been able to glean from this & other forums to get me going. One thing that's got me stumped is my floating head z-axis. I was able to get info that I need to setup OpenBuilds CAM's "Plasma: Initial Height Sensing G-Code", but I have no idea what to put in here! The placeholder shows: G0 + clearanceHeight + G38.2 Z-30 F100 G10 L20 P1 Z0 I believe the "clearanceHeight", is the distance it takes my limit switch to throw, which is about 2mm. I tried using: G0 z2 f100 G38.2 Z-30 F100 G10 L20 P1 Z0 And I got to following: Error: 9 - G-code locked out during alarm or jog state [G10 L20 P1 Z0] Edit: It might be worth mentioning this is a custom built table running GRBL 1.1h on an Arduino Uno.