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40d:Gear assembly
A gear assembly is a machine component that is used to move power between adjacent machine components such as water wheels, windmills, axles, and other gear assemblies. This allows the transfer of vertical motion to horizontal and vice versa. Each gear in a chain of gears requires 5 units of power.
Construction
Gears can be constructed from the build menu under Machine Components and gear. They require one mechanism to construct.
A gear may be used to transfer power between z-levels. In order to do so, you must first dig a channel, and then place the gear over the opening. Another gear may be used above or below to resume pathing power on the XY plane.
Disconnected gears
When connected to a lever, gears can be "disconnected" by activating the lever. However, be warned that devices connected vertically to a linked gear may collapse when disconnected. The same is true of a horizontally connected hanging device. An example is building a windmill directly on top of a gear and then "disconnecting" the gear using a lever; this causes the windmill construction to collapse. Instead, create a second gear adjacent to the linked gear upon which to support the windmill.