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[Daetrin]

I saw someone asking about cycling hallways the other day, and I finally finished mine so hopefully this will help.

Spoiler (click to show/hide)

Spoiler (click to show/hide)

Spoiler (click to show/hide)

Arrows represent linkages.

So, this keeps a single hallway open, and when enemies step into it, it locks them in (after 200 steps, just enough time to get all the way in), magmas them, and opens the next hallway simultaneously.
Connections are as follows
1) 7/7 water pressure plate to retracting bridge, to unleash the magma.
2) 7/7 water pressure plate to drawbridge, to seal in the hallway.
3) 7/7 water pressure plate to exit floodgate of next in the cycle, thus opening the bridge.
4) Override levers for all floodgates.  The ones on the far right control the water flow to each set of three.  Seen here it's in priming mode (I had to fix some stuff), setting all the hallways to closed except one.
5) Enemy-triggered pressure plate opens all floodgates in a set - opening the magma flow, and closing the drain and entrance bridges simultaneously.
6) 7/7 magma triggered pressure plate opens the drain floodgates, closing the magma flow and opening the drain.
7) 7/7 water pressure plate linked to raising bridge to block off drain from hallway.

[Girlinhat]

So, to be sure, this is Z, Z-1, and Z-2, in order?  This is rather fantastic, I am impressed.  I assume the logic chaining can be repeated infinitely, and have any number of cycling chambers?

EDIT: Correct me if I'm wrong, but each kill unit is individual, yes?  When fully activated, each chamber functions independently of the others, so they will all remain open until occupied, flood themselves, empty themselves, and open themselves, never influencing the nearby chambers.

[Daetrin]

So, to be sure, this is Z, Z-1, and Z-2, in order?  This is rather fantastic, I am impressed.  I assume the logic chaining can be repeated infinitely, and have any number of cycling chambers?

EDIT: Correct me if I'm wrong, but each kill unit is individual, yes?  When fully activated, each chamber functions independently of the others, so they will all remain open until occupied, flood themselves, empty themselves, and open themselves, never influencing the nearby chambers.

Except for the chaining part (connection #3), they're all independent.  And on the left side, yup, that's Z, Z-1, Z-2.  I have drains for the water logic on Z-1 but I didn't think it was neccessary to show them.

You can chain them as long as you want.  This was kind of a prototype, for a full version you'd probably want two sets of ten or so, so you can shut one down completely and clear it of goblinite.

[Sphalerite]

Bravo.  I approve of this device.

[Umune]

Hot diggity damn.

[evileeyore]

Bookmarked so I can one day return and try to understand how you set this up.

[Daetrin]

Bookmarked so I can one day return and try to understand how you set this up.

Well all the links are marked, but you can always PM me if you need more info!

Sadly, uploading the fort wouldn't help since you can't discern mechanical linkages after they've been made.

[Triaxx2]

Unless proper usage of (shift+n)otes has been made.

[Daetrin]

Unless proper usage of (shift+n)otes has been made.

Given the sheer number of linkages, it'd probably end up more confusing than my diagram >.>

[ETV]

Lost any dwarves when being sieged with this (trapped in the hallway etc)?

[Daetrin]

Lost any dwarves when being sieged with this (trapped in the hallway etc)?

When being sieged, no, but I did lose a pair of dwarves to an ambush triggering it when they went to go pick up the remains of a cat that was killed by said ambush.

It's pretty easy to prevent losses if there's nothing 'outside' for dwarves to get.  Though for cleaning goblinite, you do need to shut it down, which is why I suggest having two of them :p

[Girlinhat]

I'd be very careful to include emergency mid-action shutoff.  Nothing like a dragonfly corpse in the doorway to flood your base with magma.

[Daetrin]

I'd be very careful to include emergency mid-action shutoff.  Nothing like a dragonfly corpse in the doorway to flood your base with magma.

That's why I put in override levers for every floodgate. That way I can force any component at any time, as well as shutting down any portion of it.

[Girlinhat]

A grate placed outside the trap hallway would be a good security measure either way.  Just in case it overflows, it'll drain away as normal.

[Nistenf]

I really don't understand the images but it looks nice anyway