thank you for your reply and information.
I’ve been dealing with the problem of moving things to the ceiling for a long time. I like the idea very much.
I think it is feasible to build a lift from available components that would not need extra chains for protection. But it would be more effort (and more cost probably). I already have good wall anchors.
But I think when building a ceiling lift for something as heavy as a CNC machine, I would prefer to use something like leadscrews, vertically set up between two walls. Also this would add the possibility to let the machine work while it is moved away.
Another solution is a flip table. Did you already see this solution:
Fold Down Wall Mounted CNC Table