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Transport belts

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Transport belts demo.gif   Transport belts demo2.gif

Transport belts are used to transport items from one place to another. The advantages of transport belts lie in the fact that they don't use any power and are very easy to set up. There are three types of transport belts, each with their own properties.

Types

Transport belts speed.gif

Type Max. throughput (Items per game-second) Speed (Tiles per game-second) Max. density (Items per tile) Required technologies
Basic transport belt 13.393* 1.875* 7.144* none
Fast transport belt 26.786* 3.749* 7.144* Logistics 2
Express transport belt 40.179* 5.624* 7.144* Logistics 3

 *experimental value: See Transport belt experiments for more detailed information.


Placement

Transport belts notplace.gif   Transport belts doplace.gif   Transport belts replace.gif

  • Do not place transport belts by moving the mouse
  • Instead just move your character
  • You can change the direction of a transport belt by overbuilding it
  • You can change the direction of a transport belt by pressing "r" while mousovering it
  • You can upgrade a transport belt by overbuilding it with an other type








Production Layouts

Design Input Output
File:Transport belt layout1.jpg NA NA

Belt Management

Merging and un-merging

Belts have two lanes that can be used for transporting. This allows for either a double flow of one material, or with some careful setup, transporting two different materials on the same belt. Mixed belts can be benificial for smelting ore, or producing items with a lot of ingridients such as te science pack 3. Un-merging a mixed belt is fairly easy too, since a underground belt will block half of your a belt. So there is no reason to be afraid of mixed belts at all.
Transport belts merge.gif   Transport belts unmerge.gif

Balancing the belts

Sometime you will find one side of a belt more empty than the other. In this care rebalancing the belt can be helpfull.
The left design only rebalances equaly if one side of the belt is empty while the right version always balances equaly. Transport belts balance1.gif   Transport belts balance2.gif

Speed, Density and Throughput: About finding the bottlenecks

Maximising the throughput is importent, since it will keep your belts efficient. Therefor we need to introduce some definitions:

  • Speed
How fast does a belt move.
  • Density
How tight are the items put on the belts.
  • Throughput
This is speed * density. It describes how many items pass by in a given time.

So there are two opportunities to enhance the throughput:

  • More density

Sometimes items have little spaces next to each other that aren't big enought for other items to fit in. In this case reordering the items can still increase the density. This can be done by temporarly increasing the belt speed on a single tile or by merging 2 lanes with an inserter.
Transport belts density.gif

  • More speed

If your belts already are at max. density you can still upgrade your speed with better belts. But first you have to find the bottleneck. The bottleneck can be seen quite easy, if there is a part of a belt, where the items sometimes stop or don't move (or don't move fast) at maximum density and suddenly they come to a point, where this "stop and go" releases itself and they run free and are not so tight on the belt. This is in most cases the exact place, where you need to optimize your belts.

Moving other Entities: About highways, advanced defences and moving boxes

Moving fast can be essential to defend alien attacks in time. Running on a belt will increase or decrease the movement speed of the player accordingly to the belts speed. That is why building a belt towards your defences can be benificial.

However the player is not the only unit that can be moved by transport belts. Also biters and spitters can be moved. This can be abused to improve your defence. Firstly biters will have a harder time to reach your walls when placing express transport belt infront of them. Secondly spitters can be moved closer to your walls. That way more turrets can attack a single spitter at once.

Another usefull usage are cars on transport belts. Cars have an inventory and can be filled by inserters. So they can be used as moving boxes on belt. This has several advantages: Firstly the throughput of the beltboxed is amazingly high, secondly the inserter stack size bonus does apply here and make inserters more effective.

Transport belts movement.gif   Transport belts defence.jpg   Transport belts carboxes.gif


See also

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