Ok, I was overly excited when pistons were released with 1.7 because I wanted to be able to make elevators. To my surprise, and disappointment, stacking pistons doesn't work very well in that if you stack them more than a couple high, your lower ones can't push them up (limit to blocks pushed) and the upper pistons tend to stay where they have been pushed to (limit single block pulled) It would be great if when pistons were connected together, they would chain together as if one mechanism allowing elevators or large doors. Could this possibly be fixed by allowing pulling a greater number of blocks?
No, it is NOT a bug. It is completely intentional.
@ OP
What you need to do is have the redstone sequenced with a timer of some sort that causes the pistons to retract from the top down, and to expand from the bottom up.
an elevator is not impossible, and is quite simple with some redstone know-how. It's just far less practical than ladders.
Pistons cannot pull powered pistons.
The problem with sticky piston elevators is to retract, the top one has to retract before the one below that, and to go up the bottom one has to go up first, so the only way to do it is to have a button for going up and one for going down, because they both would need different repeaters to go off at different times.
However to make it so pistons automaticly chain together would probably cause other problems as well of being too convienient for this matter.
@ OP
What you need to do is have the redstone sequenced with a timer of some sort that causes the pistons to retract from the top down, and to expand from the bottom up.
an elevator is not impossible, and is quite simple with some redstone know-how. It's just far less practical than ladders.
The problem with sticky piston elevators is to retract, the top one has to retract before the one below that, and to go up the bottom one has to go up first, so the only way to do it is to have a button for going up and one for going down, because they both would need different repeaters to go off at different times.
However to make it so pistons automaticly chain together would probably cause other problems as well of being too convienient for this matter.
I'm fairly sure it will work with the official pistons.
Edit: Yet it doesn't. Needs to be fixed.
Mostly moved on. May check back a few times a year.