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[Jostain the Green]

I was going to built a super structure and made myself a "obsidian watt" by digging down to the bottom of the volcano and making several channels leading to steel pumps that propelled the magma to the watt.

I used the watt like this to train my miner under the impression that magma pipes were infinite now ive reached the bottom and its completely dry. the dwarfs can now walk on the bottom tiles called "magma flow" and build stuff directly on it. this is the first time I encounter this and ive done extensive testing on the design and the pipe always refills.

is this some kind of bug or a certain type of volcanoes?

/Jostain The Green.

Ps. I used a world gen from the forum called plane of cool that makes tons of pipes if that has something to do with it.

[blah28722]

Is it possible that it's refilling very slowly? AFAIK magma pipes always refill, albeit slowly.

Also, I believe magma pipes refill from the top. Although the top of "nothing" is also the bottom of nothing. Not sure if that helps.

[Jostain the Green]

from the top?!
only in DF...

thanks for the tips.
does the magma always replenish at the same rate or does it change from pipe to pipe. if its constant what kind of figures are we talking?

[Smew]

I'd say at 100 FPS(mostly constant) we're talking about 10/15 minutes for one level to fully refill.
As for the whole magma pipe refilling from the top, this is due to the way that magma works, say you're working with magma on a purely horizontal level, magma cannot push other magma 'up' like the way water works, so the only way for a magma pipe to really refill would be to have it "simulate" a refilling from the bottom, by just generating magma on whatever level is currently the "top" level...
This is making less sense the more I try to explain it.

[Jostain the Green]

ah... So its basically possible to drain the volcano if you drain it from the bottom most tile. so theoretically i can re-ignite the volcano by refilling the final layer with magma.
I think ill make a new map to perfect the design rather than modifying.

[Sutremaine]

An obsidian what now? It must be some kind of obsidian farm if you're training miners with it, but I have no idea what a watt is in this context.

[lordcooper]

Build a fort in there before it refills!

[Angellus]

Build a fort in there before it refills!

Haha, only on the DF forums XD

[Jostain the Green]

I started doing that in a earlier fortress but i never got around to filling it up. should work tough.

and i meant "vat" earlier not watt. im a terrible speller.

[dragon0421]

Wow you used up an ENTIRE PIPE? Are you sure it's not a pool? How hard was it?

[Albedo]

Just to be on the safe side, you are sure this is a "pipe" and not a "pool"?  (You do know the diff?)

[Smew]

^
^

magma flow

I'm pretty sure the bottom of magma pools is just normal ground, magma pipes however are magma flow, last I checked.
So he'd either be pulling our legs, or there's a bug.

[Albedo]

Missed that, my bad.   

[Jostain the Green]

to be clear. It was a pipe reaching to the surface and I drained it by placing 10 bauxite pumps with smaller tunnels gathering into a large tunnel going to a large room 2 Z-levels high. The lowest portion of the pipe was much larger than the one above so all I had to do was building the pumps on the level above and when i was done channel the parts where the lave comes out the tunnel filled fast and reached the Floodgates that controlled the magma flow. I made one slight error in that i forgot to seal a part of the tunnel running over chasm and due to being one level lower than the pumps (bottom level that is) the magma leaked out of the tunnel into the chasm and draining the entire pipe. noticing that the magma didn't regenerate i dug into the bottom floor and found the ground to be walkable. the ground said "magma Flow" but produced no magma. it was like solid ground in everything but towards falling objects that disappeared. I had a theory that you might be able to "jump start" the magma by refilling the bottom floor but i didn't have enough magma left so i gave up and started over.

[Shrike]

So, for this underwater obsidian city I'm making, best to tap from the  top, then. And, probably best to fill the ground level with the lake first, and use a bunch of hatches to control the outflow level of the magma.

And I thought you meant something like Angkor Wat.