I've upgraded my Ender 3 Pro to the point where I'm causing myself problems, one of them specifically is this:
My z axis drops down to the bed because of all the stuff hanging off it (added a bltouch probe, cable chain) whenever it is idle, example video of what I am talking about. When it first started happening I bought an Anti backlash leadscrew nut and installed that and it helped A BIT. The gantry wouldn't drop as often or as far.
But it still happens. I've thought about possibly adding a dual z axis motor and leadscrew anyway (with additional anti-backlash nut), and I wonder if that'll help because the gantry would have to overcome the friction on both sides..... but in the meantime I want to solve a very specific problem it causes: I just printed a benchy and right after the print was done (when I wasn't paying attention and before I noticed) the nozzle crashed right down into the print. It must have still been a little hot because it melted right into it. Not far enough to ruin it but I could see this causing an issue if it was something besides the Benchy.
Is there code I can run at the end of a print to tell the hot end to move out of the way? So if it does come crashing down its off in the corner or something? I use Cura and marlin if thats relevant. I did see this question but I guess my even dumber question is: if that code works, how do I add it? Is that in Cura?