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Difference between revisions of "v0.34:Silk farming"

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'''Silk farming''' is the process of havesting large quantities of silk from webslinging creatures like [[giant cave spider]]s. Several setups have been devised to farm silk quickly and safely, but successful silk farms have a few traits in common:
 
'''Silk farming''' is the process of havesting large quantities of silk from webslinging creatures like [[giant cave spider]]s. Several setups have been devised to farm silk quickly and safely, but successful silk farms have a few traits in common:

Revision as of 21:25, 13 April 2013

xTATTEREDx  · +FINE+  · *SUPERIOR*  · ≡EXCEPTIONAL≡  · ☼MASTERWORK☼
v50.14 · v0.47 · v0.34.11 · v0.31 · v0.28 · v0.23
This article is about an older version of DF.

Silk farming is the process of havesting large quantities of silk from webslinging creatures like giant cave spiders. Several setups have been devised to farm silk quickly and safely, but successful silk farms have a few traits in common:

  1. The webslinging creature must be aggressive toward its bait. Tame giant cave spiders are aggressive toward invaders, while wild spiders and various other untamable creatures are aggressive toward most tame animals (with cats being a notable exception). Tame spiders are not aggressive toward animals on restraints.
  2. The webslinging creature must not be able to reach its bait; if it can, the bait (or creature) will die and no further silk will be generated. Spiders can destroy wooden doors but not stone or metal doors. They cannot pass through forbidden doors or doors that have been "tightly closed". Other silk-spewing creatures can destroy all non-artifact doors, requiring drawbridges or walls for containment
  3. Web collection cannot occur in sight of wild webslingers or invaders serving as bait; either will cause dwarves to interrupt collection. Drawbridges work well to block line of sight in either case, as webs will not prevent them from raising.

One design is as follows:

╔ ═ ═ ═ ═ ═ ═ ═ ═ ═ ═ ═ ╗
║ + + + + + + + + + + + ║
║ + + + + + + + + + + + ║
║ + + + + + + + + + + + ╣
X + + + + + + ╞ ═ ═ ═ ╡ ║
║ + + + + + + ╥ ╬ ╬ ╬ ╬ ║
║ + + + + + + ║ ╬ g ╬ S ║
║ + + + + + + ╨ ╬ ╬ ╬ ╬ ║
X + + + + + + ╞ ═ ═ ═ ╡ ║
║ + + + + + + + + + + + ╣
║ + + + + + + + + + + + ║
║ + + + + + + + + + + + ║
╚ ═ ═ ═ ═ ═ ═ ═ ═ ═ ═ ═ ╝
  1. Dig out (and optionally smooth) a sufficiently large room (example shown is 11x11).
  2. Channel out the "S" square and the "g" square and build retracting bridges over the gaps. Link these bridges to a lever and place a cage trap underneath whichever square will eventually hold the hostile creature. Separate levers for each bridge may also be used. Do not use any creatures with a size of over 1,000,000 as bait! The weight of these creatures will jam the bridge in place. This step is optional, and allows a creature or corpse to be removed from the silk farm and either repositioned or recaptured without military involvement.
  3. Construct all of the red fortifications.
  4. Build the 3 green bridges, all raising lengthwise to form long walls.
  5. Construct a lever somewhere convenient in your fortress and link it to the 3 bridges.
  6. Build one of the 2 floodgates and link it to the lever. Pull the lever to open the floodgate and allow access to the room, then build the second floodgate and link it to the lever. Pull the lever until both floodgates are closed.
  7. Using a pit/pond activity zone on the Z-level above, drop a tame giant cave spider into the gray "S" square and a hostile creature (such as a goblin) into the gray "g" square. Alternatively, use a hostile spider and a tame creature - the main concern is that the spider must be hostile toward its target.

At this point, the spider will begin blasting the bait creature with webs, and most of the webs will fly through the fortifications and land on the floor to the left. Once enough webs have accumulated, pull the lever to open the chamber for collection and raise the 3 bridges. These bridges enclose both spider and bait, and while the spider will continue to web the bait this does not cause the same lag as the old door method.

Silk can be farmed just as easily from a wild spider with a few changes. Domesticated pets can be used in place of goblins for wild spider, but avoid grazers; other animals may need to be replaced when they die of old age. It's recommended that you place a backup cage trap to reposition the spider if your first design doesn't meet your needs, but remember that should any webbing fall on the cage trap, it will trap your dwarves as easily as it will the spider. Wild spiders can be placed via lever-controlled deconstructing cage (which would have to be placed inside the chamber prior to building the fortifications), or pitted from above.

Note that tame spiders are hostile to wild animals. This means that you can use a benign wild animal, such as a grasshopper man or a large rat, as a bait animal, instead of a hostile creature like a goblin. Dwarves are not as frightened of wild animals as they are of hostiles, and this can make the shutter bridges and surrounding walls entirely unnecessary--the weaver can simply walk up to the webs as the spider shoots them. This may cause the occasional cancel spam when an errant web hits the weaver directly, but there is no real danger.

Farming silk from other procedurally generated creatures is somewhat more difficult and less rewarding. As level 2 building destroyers, these creatures can only be contained by bridges or artifact doorways. They are also immune to traps, making positioning in the farm rather more complicated. Finally, without a value modifier, the collected silk will be equivalent in value to common cave spider silk. They do still provide a nearly-inexhaustible source of silk thread, and with some effort their webs can also be used to cage other trap immune creatures.

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