Problems building a working magma forge in current version of DF

I am having problems building a working magma forge in my fortress (using the most current version of DF). I have built magma forges in prior versions and am aware that I need to place the "darker green" x in the magma forge template over the hole leading to magma in the Z level below the forge. When I build a forge in my current fortress it apparently builds ok, but when I try to set jobs for the completed forge it says it needs magma under the forge. I have excavated a large open area (approx. 50x40 tiles) one Z level lower in my fortress that is still filling with magma (currently filled to 2-3 depth) from a connected magma pipe. Do I need to wait until the magma fills to a higher level than 2-3, or are there other requirements I am missing to get the forge to work?

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1 Answer

As indicated in the second paragraph of the introduction to the Magma Forge on the DF Wiki, you need to wait until one of the eight non-center tiles of the forge fill to a depth of at least 4/7.

To build a magma forge, you must have magma-safe materials (non-magma-safe materials will not be shown on the material list), an anvil, and a build site where at least one tile directly beneath one of its eight non-center tiles contains magma at a depth of 4/7 or greater.

Assuming your influx of magma is sufficient to overcome the evaporation process, you ought to be able to wait for a while and the forge will become active.

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