I had the exact same issue after recently installing the 45w laser. Never had an issue before that. When I shut down cnc12 the Z axis slowed dropped until it bottomed out. I didn’t notice it was happening once and it drove a bit into my spoil board. I spoke to Rusty and went in this weekend and tightened the two set screws in the collar of the holding brake at the bottom of the ball screw. I checked to be sure the brake was fully seated and it was. Basically it seems like all I did was loosen the two screws and then retighten them. It seems to have worked so far although it’s only been 24 hours. I have tested it a few times by shutting git down and have not had it drop yet. Hoping this fixed it but it.
So, Eric, what is the secret to getting Avid support to get back to me? Emailed through support on the site last Tuesday and have heard nothing. Called and left a message last Thursday. Have heard nothing. Please tell me what it takes?