It is not the tool change height problem. The tool is beginning to release way before the carousel moves in. It should not begin to release until the changer is in place and trips the switch indicating so.
I have seen the switch that indicates that the carousel is in place stick and tools get dropped straight out of the spindle, but never seen one only partially release.
One thing is that the video is slowed way down, so it is possible that the carousel is almost there before this happens, which means that a switch may be sticking.
There are two switches that trip when the carousel is in the "IN" and "OUT" positions. I would start by cleaning each one. Spray something like WD-40 on them and cycle them by hand many many times to free them up. They often get sticky and move but not that last .02" or so they need to trip. Often they just stick for a fraction of a second and appear to be working fine.
Anyway, sorry for the poor explanation, but this is not a tool change height setting problem. The carousel should be in place before the tool is even starting to be released. Not saying that the change height may not be off, but it does not cause this problem.
Mike
Two Haas VF-2's, Haas HA5C, Haas HRT-9, Hardinge CHNC 1, Bother HS-300 Wire EDM, BobCAD V23, BobCAD V28