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Okay, so I am trying to build a 11x11 self erecting wall using cobblestone generators. I worked on it for about 4 hours last night unable to figure out how to erect that many sides(4) at the same time. The wiring works fine(except for the corner pistons), but my big problem is getting the lava flow and water to meet at the same time. I have seen youtube videos of people showing this off as an self repairing wall, but none showing how to build it correctly. If there are any pistons/redstone/coblestone generator experts out there, hit me up! If you know what you are doing,( my GT is on my profile) you are more than welcomed to join me. I play almost everyday when my wife and kid goes to sleep(around 8pm-1am). Or if you know of a great video that explains what I am asking for, please post it here. Thanks so much guys and remember together we can build a better pixelated world!!

The important thing about the basic generator is not to let the water flow into the lava source block. That will turn it into obsidian. You need water to flow down into a hole 1 deep, toward the lava, but leaving one more block open for the cobble to form.

See near the beginning, at 0:20. It shows you the proper setup. The BUD switch is an interesting idea, but it tends to jam once in a while. Also, I can't figure out how to detect the end of the line if I want to push up instead of sideways. Frustrating. So my vertical (wall) cobble generator works off of 2 independent clocks right now. It goes up in jaggy fashion, but reliably. I made a regular clock for the piston pushing out cobble, and a slower clock for pushing up the bank of pistons that raises the wall. I can't help you with the corners. I haven't tried that, though it seems like a neat idea: self-building room.

Quote from Cobra951

The important thing about the basic generator is not to let the water flow into the lava source block. That will turn it into obsidian. You need water to flow down into a hole 1 deep, toward the lava, but leaving one more block open for the cobble to form.

See near the beginning, at 0:20. It shows you the proper setup. The BUD switch is an interesting idea, but it tends to jam once in a while. Also, I can't figure out how to detect the end of the line if I want to push up instead of sideways. Frustrating. So my vertical (wall) cobble generator works off of 2 independent clocks right now. It goes up in jaggy fashion, but reliably. I made a regular clock for the piston pushing out cobble, and a slower clock for pushing up the bank of pistons that raises the wall. I can't help you with the corners. I haven't tried that, though it seems like a neat idea: self-building room.

Thanks Bro! You are truly the man!
Right now i have them on one clock which the timing seems to be right.. only real problem is space it seems like. i may have to change its location.
If you ever want to join my world you are welcome!

Okay so I found a video that answers must of my questions.. So I shall share this knowledge here: ... However I still need to find a way to make it do four sides.

That video was a revelation, and I implemented what I'll call the parallel generator today. Works perfectly, and makes my single-block pusher completely obsolete. I can now push up 120 cobble pieces in about 10 seconds. And yes, the wall self heals about as fast as I can knock the blocks off of it. It was so obvious too, once I saw it. Lava trough on one side, water trough on the other, pistons pushing up in between, redstone torches powering the pistons from underneath, with repeaters feeding a clock pulse to them. The only part I had to think about was modifying a pulse limiter to be inverted, and all that took was replacing its output torch with straight redstone dust. The torches invert the state of the repeaters, so they need to feed a sustained high signal, with a pulsing short break. The inverted pulse limiter does the trick. The torches then invert that input into short high pulses to extend and retract the pistons quickly, to allow cobble to form as quickly as possible.

Thanks for posting the video. There's another one out there that has a self-building fortress, but I can't find it right now. It looks to be exactly what you want. If I find it, I'll edit it into my post.

Edit: OK, . I saw it in this thread.

Quote from Cobra951

That video was a revelation, and I implemented what I'll call the parallel generator today. Works perfectly, and makes my single-block pusher completely obsolete. I can now push up 120 cobble pieces in about 10 seconds. And yes, the wall self heals about as fast as I can knock the blocks off of it. It was so obvious too, once I saw it. Lava trough on one side, water trough on the other, pistons pushing up in between, redstone torches powering the pistons from underneath, with repeaters feeding a clock pulse to them. The only part I had to think about was modifying a pulse limiter to be inverted, and all that took was replacing its output torch with straight redstone dust. The torches invert the state of the repeaters, so they need to feed a sustained high signal, with a pulsing short break. The inverted pulse limiter does the trick. The torches then invert that input into short high pulses to extend and retract the pistons quickly, to allow cobble to form as quickly as possible.

Thanks for posting the video. There's another one out there that has a self-building fortress, but I can't find it right now. It looks to be exactly what you want. If I find it, I'll edit it into my post.

Edit: OK, . I saw it in this thread.

[media]http://www.youtube.c...Gga6dIWY[/media]

I Actually made a self repairing guard tower! Took me forever to figure out to make the corners work. Join my world tonight and check it out!