I've been trying to make a piston mover that moves down rather than sideways. I know basic subframe, and have already made movers that move to the right. I've made several prototypes, and yet I can't even make a subframe piston pointing downwards. It usually just stays in place, and does not move things out of its way. I know it doesn't push them and pull them back because I used non-sticky, tmp 1 frame during my tests.
Edit: This mover will possibly be in contact with water at some point, so those movers that create a temporary piston behind them might not work. I want a solid, one piece machine.
Here's my save with some of the unsuccessful piston movers:
Please tell me what I'm doing wrong, and/or show me how to make this type of mover.