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Editing Roller
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− | {{Quality| | + | {{Quality|Superior|23:48, 30 May 2014 (UTC)}} |
− | {{ | + | {{Machine component|name=Roller|key=r |
− | |||
|construction= | |construction= | ||
* 1 or more [[Mechanism]]s | * 1 or more [[Mechanism]]s | ||
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{{av}} | {{av}} | ||
− | A '''roller''' is a [[power]]ed [[machine component]] for the automated propulsion of [[minecart]]s. They are built over the top of existing tracks with | + | A '''roller''' is a [[power]]ed [[machine component]] for the automated propulsion of [[minecart]]s. They are built over the top of existing tracks with {{K|b}} {{K|M}} {{K|r}}, requiring a [[mechanic]], ''(length/4)+1'' [[mechanism]]s and a [[rope]]. Rollers are very useful to maintain a cart's momentum along long routes, to get them to climb Z-levels without dwarfpower involved, and to get them to reach speeds unattainable by guiding dwarves. These devices are variable-length (1-10), variable-direction and variable-speed ([[Minecart#Numbers_behind_the_scene|see here]]), all set prior to construction. A roller uses two units of power per tile of length. |
Rollers do not provide acceleration but rather set the cart's velocity to a new value: if a cart moves across an active roller in the direction the roller works and moves slower than the roller's specified speed, the cart will be set to the roller's speed. Carts going faster than the roller are unaffected. | Rollers do not provide acceleration but rather set the cart's velocity to a new value: if a cart moves across an active roller in the direction the roller works and moves slower than the roller's specified speed, the cart will be set to the roller's speed. Carts going faster than the roller are unaffected. | ||
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! Speed | ! Speed | ||
|- | |- | ||
− | | Down | + | | Down ramp ¹ |
| 4900 | | 4900 | ||
|- | |- | ||
− | | Dwarf | + | | Dwarf push ² |
| 20000 | | 20000 | ||
|- | |- | ||
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All rollers transmit power ''perpendicular'' to their activity direction. Rollers that are only one tile long transmit power in all four cardinal directions, on the same level, and can thus serve as a replacement for gear assemblies when switching power on/off or vertical connection is not required; the roller takes a mechanism and a rope to build, but only consumes two power. Longer rollers can ''also'' transmit power along their activity direction (along the tracks) if the 'build order' is correct, but the rules are complicated and such power transmission will permanently cease or never become available if the conditions are not met. It's generally better not to rely on such transmission. | All rollers transmit power ''perpendicular'' to their activity direction. Rollers that are only one tile long transmit power in all four cardinal directions, on the same level, and can thus serve as a replacement for gear assemblies when switching power on/off or vertical connection is not required; the roller takes a mechanism and a rope to build, but only consumes two power. Longer rollers can ''also'' transmit power along their activity direction (along the tracks) if the 'build order' is correct, but the rules are complicated and such power transmission will permanently cease or never become available if the conditions are not met. It's generally better not to rely on such transmission. | ||
− | Rollers cannot be powered from above. | + | Rollers cannot be powered from above. For most cases it is desired, using [[screw pump]] impassable tiles can make for a "powered wall" workaround. |
+ | |||
{{buildings}} | {{buildings}} |