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{{Languages}}
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The belt transport system is the first system the [[player]] will use to transport items from place to place. It, along
 +
with [[Railway|trains]], and [[Logistic network|Logistic robots]], makes up the systems of item transportation in
 +
Factorio.
 +
 +
Belts specifically are used to transport items and run without using energy. Belts can also interact with other moving entities such as [[player]]s, [[vehicle]]s and [[enemies|biters]], also allowing for faster or slower movement speed.
 +
 +
== All types of Transport belts ==
 +
 +
Below is a chart of all the Transport Belts present and available for use in Factorio.
 +
 +
{| class="wikitable"
 +
! [[Transport belts]] !!  [[Underground belts]] !!  [[Splitters]] !! Max. throughput (Items per [[game-second|second]]) !! Needed research !! Raw materials (per belt)
 +
|-
 +
| {{Imagelink|Transport belt}}
 +
| {{Imagelink|Underground belt}}
 +
| {{Imagelink|Splitter|Splitter}}
 +
| 13.333
 +
| [[Logistics (research)]]<sup>1</sup>
 +
| {{Icon|Time|1}} + {{Icon|Iron plate|3}}
 +
|-
 +
| {{Imagelink|Fast transport belt}}
 +
| {{Imagelink|Fast underground belt}}
 +
| {{Imagelink|Fast splitter}}
 +
| 26.666
 +
| [[Logistics 2 (research)]]
 +
| {{Icon|Time|3.5}} + {{Icon|Iron plate|11.5}}
 +
|-
 +
| {{Imagelink|Express transport belt}}
 +
| {{Imagelink|Express underground belt}}
 +
| {{Imagelink|Express splitter}}
 +
| 40.0
 +
| [[Logistics 3 (research)]]
 +
| {{Icon|Time|9}} + {{Icon|Iron plate|31.5}} + {{Icon|Lubricant|20}}
 +
|-
 +
|}
 +
 +
(1) Only for the underground belt and splitter. The basic transport belt is available at the start of the game.
 +
 +
Regardless of the belt tier, a fully filled transport belt can hold between 6 and 8 items. See [[Transport_belts/Physics|Physics of Transport Belts]] for more detailed information on this.
 +
 +
== Tiers of belts ==
 +
 +
[[File:Transport_belts_speed.gif|300px|thumb|top|Animation showing the three types of belt and their speed (from top to bottom: regular belts, fast belts, and express belts).]]
 +
There are 3 different tiers of belts available for use. The [[transport belt]] has a yellow color and is
 +
the slowest, as well as the cheapest to craft. The next tier up, the [[fast transport belt]] has a red color and is twice as fast as the standard transport belt. The [[express transport belt]] is the final tier. It is colored blue and is three times faster than normal belts, or 1.5× faster than red belts.
 +
{{clear}}
 +
 +
== Belt mechanics ==
 +
 +
=== Merging and un-merging belts ===
 +
 +
Belts of all tiers have 2 lanes for items to ride on. This allows for either a double flow of one material, or to transport two different materials on the same belt. Mixed belts can be beneficial for
 +
smelting ore, or producing items with many different ingredients such as [[high tech science pack]]. The belt can be unmerged using a splitter filter. It is also possible to unmerge a mixed belt by using underground belts since an underground belt will block half of the belt.
 +
 +
[[File:Transport_belts_2_lanes.gif|top]]&nbsp;&nbsp;&nbsp;[[File:Transport_belts_unmerge.gif|300px|top]]
 +
 +
Commonly, merging and un-merging is done by using a [[splitter]]. The trick in the second gif is better described in the '''[[Belt_transport_system#Separating_belt_lanes|Underground Belt]]''' section.
 +
 +
=== Lane balance ===
 +
 +
Due to how items are placed onto belts by [[inserters]], their lanes can sometimes become unbalanced. In order to
 +
maintain throughput, balancing the lanes may be necessary. The gifs below show two ways how to do this. The former only works if only one lane is in use initially. For further explanation of the mechanics, see [[Balancer mechanics#Lane_balancers]].
 +
 +
[[File:Transport_belts_balance1.gif|top]]&nbsp;&nbsp;&nbsp;[[File:Transport_belts_balance2.gif|top]]
 +
 +
=== Belt throughput ===
 +
[[File:Stack inserters fill express belt.gif|frame|right|4 [[stack inserter]]s can compress an express belt at stack size 12 for the left inserters and stack size 7 for the right inserters.]]
 +
Maximizing the throughput is important since it will keep belts efficient. Therefore some definitions need to
 +
be introduced:
 +
 +
; Speed
 +
: How fast a belt moves. 
 +
; Density
 +
: How tight are the items put onto the belts. 
 +
; Throughput
 +
: This is speed × density. It describes how many items pass by at a given time.
 +
 +
So, there are three opportunities to enhance the throughput:
 +
 +
; More density
 +
:Sometimes items have small gaps in between each other that aren't big enough for other items to fit in. However, mining drills, inserters, and belt sideloading can still force an item into these gaps, temporarily squashing the items on the belt. The squashed gap is extended to normal size once the front of the belt starts to move again.
 +
; More speed
 +
:If the belts in the factory are already at maximum density, their speed can still be upgraded with better belts.  Finding the bottleneck is the first thing that needs to be done, usually it can be discovered quite easily. There will be a part of the belt where the items don't move quickly (or at all) or stop at maximum density and suddenly they come to a point where this 'stop and go' effect releases itself, the bottleneck has been found. In most cases, this will be the place where belt optimization is needed.
 +
; More belts
 +
:Adding additional parallel belts can also increase the throughput. Simply place more belts carrying the item that needs throughput.
 +
 +
=== Belt tricks ===
 +
 +
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 [[defense]]s can be beneficial.
 +
 +
However, the player is not the only unit that can be moved by transport belts. Additionally, biters and spitters can be moved. This can be abused to improve your defense. Firstly, biters will have a harder time to reach your walls when placing express transport belt in front of them. Secondly, spitters can be moved closer to your walls. That way more turrets can attack a single spitter at once.
 +
 +
Another useful usage is [[car]]s on transport belts. Cars have an inventory and can be filled by [[inserters]]. So, they can be used as moving boxes on belts. This has several advantages: Firstly the throughput of the belt-car-boxes is amazingly high, secondly the inserter stack size bonus does apply here and makes inserters more effective.
 +
 +
== Splitters ==
 +
 +
[[Splitters]] are another form of item manipulation. Splitters are a 2×1 entity that splits incoming items on belts
 +
from up to two input to up to two outputs, in a 1:1 ratio. They are used to divide resources between two belts, or balance
 +
multiple belts.
 +
 +
=== Mechanics ===
 +
 +
The behavior of splitters looks simple at first glance. But they are not that simple. Splitters have an astonishing amount of uses.
 +
 +
* Splitters have two input belts and two output belts. If the splitter receives items on one belt, it will split the input evenly between its two outputs.
 +
* If one of the outputs is fully backed-up and the splitter cannot split evenly, it will put all input on its other output.
 +
* Splitters can also take two inputs and one output.
 +
* Splitters preserve the lanes of the items, an item on the right lane is not moved to the left lane and vice versa.
 +
* Splitters can prioritize one input and/or one output. Clicking on a splitter opens its GUI where the priorities can be set.
 +
* One output of the splitter can be filtered to one item. Items of that type will only go to that output, and not to the other one. When a filter is set, the output of that side is prioritized.
 +
 +
In order to join/split belts, the splitter must be the same speed as the incoming belts, otherwise the splitter will
 +
become a bottleneck.
 +
 +
==== Priority ====
 +
For both the input and output side of the splitter it is possible to set the priority to either left or right.
 +
 +
A splitter where the input priority has been set will first try to consume the specified input side, and will only
 +
consume the other input once there is a gap on the prioritized input belt.
 +
 +
Similarly a splitter where the output priority has been set will try to redirect all incoming items
 +
to the specified output, and will only output on the other output once the specified output is full.
 +
 +
==== Filter ====
 +
If a specific item is set in the splitter's filter slot, the slider for the output priority will
 +
be used for the filter instead. All items of the set type will be redirected to that specific output
 +
and all other items are directed to the other output. The input priority can be set independently of the filter.
 +
 +
=== Balancing ===
 +
 +
{{Main|Balancer mechanics}}
 +
 +
Balancers are used to evenly distribute items over multiple belts or multiple belt lanes.
 +
 +
=== Manipulating belt lanes ===
 +
<gallery mode="slideshow">
 +
File:Swap_belt_lanes.png|Swapping lanes on a belt with a different item per belt lane.
 +
File:Splitter_seperate_belt_lanes.png|Separating lanes with different items on them.
 +
</gallery>
 +
 +
== Underground belts ==
 +
 +
Underground belts can be used to cross different flows of items without interfering. They move items like a [[Transport belts|normal belt]].
 +
 +
* Underground belts can cross any number of entities and all types of ground, like water and grass. (as long as the input and output endpoints are on land)
 +
* Underground belts can cross other underground entities (any number of underground belts or underground pipes). They won't be mixed.
 +
* For the connection only the endpoints (entry-side and exit-side) are relevant.
 +
* The maximum distance underground is 8 [[tile]]s with [[express underground belt]]s.
 +
* An underground belt pair of that bridges a gap of 4 tiles stores up to 44 items. An express underground belt pair at max length stores up to 72 items.
 +
* The half of the underground belt tile with a belt can accept input from the side. The other half (with a tunnel entrance) blocks incoming items.
 +
 +
=== Separating belt lanes ===
 +
<gallery mode="slideshow">
 +
File:Block belt lane.png|This is built by placing one underground belt and then using R to reverse its direction. This converts the underground belt entrance to an exit (and vice versa).
 +
File:Transport belts unmerge.gif|This can also be used to split the lanes of a belt onto seperate belts instead of using a splitter filter.
 +
 +
</gallery>
 +
 +
== See also ==
 +
* [[Splitters]]
 +
* [[Transport belts]]
 +
* [[Underground belts]]
 +
 +
{{C|Belt transport system}}

Revision as of 20:50, 23 November 2018

作業場/workspace 日本語話者の方、マサカリ投げてくださると助かります


The belt transport system is the first system the player will use to transport items from place to place. It, along with trains, and Logistic robots, makes up the systems of item transportation in Factorio.

Belts specifically are used to transport items and run without using energy. Belts can also interact with other moving entities such as players, vehicles and biters, also allowing for faster or slower movement speed.

All types of Transport belts

Below is a chart of all the Transport Belts present and available for use in Factorio.

Transport belts Underground belts Splitters Max. throughput (Items per second) Needed research Raw materials (per belt)
Transport belt.png
Transport belt
Underground belt.png
Underground belt
Splitter.png
Splitter
13.333 Logistics (research)1
Time.png
1
+
Iron plate.png
3
Fast transport belt.png
Fast transport belt
Fast underground belt.png
Fast underground belt
Fast splitter.png
Fast splitter
26.666 Logistics 2 (research)
Time.png
3.5
+
Iron plate.png
11.5
Express transport belt.png
Express transport belt
Express underground belt.png
Express underground belt
Express splitter.png
Express splitter
40.0 Logistics 3 (research)
Time.png
9
+
Iron plate.png
31.5
+
Lubricant.png
20

(1) Only for the underground belt and splitter. The basic transport belt is available at the start of the game.

Regardless of the belt tier, a fully filled transport belt can hold between 6 and 8 items. See Physics of Transport Belts for more detailed information on this.

Tiers of belts

Animation showing the three types of belt and their speed (from top to bottom: regular belts, fast belts, and express belts).

There are 3 different tiers of belts available for use. The transport belt has a yellow color and is the slowest, as well as the cheapest to craft. The next tier up, the fast transport belt has a red color and is twice as fast as the standard transport belt. The express transport belt is the final tier. It is colored blue and is three times faster than normal belts, or 1.5× faster than red belts.

Belt mechanics

Merging and un-merging belts

Belts of all tiers have 2 lanes for items to ride on. This allows for either a double flow of one material, or to transport two different materials on the same belt. Mixed belts can be beneficial for smelting ore, or producing items with many different ingredients such as high tech science pack. The belt can be unmerged using a splitter filter. It is also possible to unmerge a mixed belt by using underground belts since an underground belt will block half of the belt.

Transport belts 2 lanes.gif   Transport belts unmerge.gif

Commonly, merging and un-merging is done by using a splitter. The trick in the second gif is better described in the Underground Belt section.

Lane balance

Due to how items are placed onto belts by inserters, their lanes can sometimes become unbalanced. In order to maintain throughput, balancing the lanes may be necessary. The gifs below show two ways how to do this. The former only works if only one lane is in use initially. For further explanation of the mechanics, see Balancer mechanics#Lane_balancers.

Transport belts balance1.gif   Transport belts balance2.gif

Belt throughput

4 stack inserters can compress an express belt at stack size 12 for the left inserters and stack size 7 for the right inserters.

Maximizing the throughput is important since it will keep belts efficient. Therefore some definitions need to be introduced:

Speed
How fast a belt moves.
Density
How tight are the items put onto the belts.
Throughput
This is speed × density. It describes how many items pass by at a given time.

So, there are three opportunities to enhance the throughput:

More density
Sometimes items have small gaps in between each other that aren't big enough for other items to fit in. However, mining drills, inserters, and belt sideloading can still force an item into these gaps, temporarily squashing the items on the belt. The squashed gap is extended to normal size once the front of the belt starts to move again.
More speed
If the belts in the factory are already at maximum density, their speed can still be upgraded with better belts. Finding the bottleneck is the first thing that needs to be done, usually it can be discovered quite easily. There will be a part of the belt where the items don't move quickly (or at all) or stop at maximum density and suddenly they come to a point where this 'stop and go' effect releases itself, the bottleneck has been found. In most cases, this will be the place where belt optimization is needed.
More belts
Adding additional parallel belts can also increase the throughput. Simply place more belts carrying the item that needs throughput.

Belt tricks

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 defenses can be beneficial.

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

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

Splitters

Splitters are another form of item manipulation. Splitters are a 2×1 entity that splits incoming items on belts from up to two input to up to two outputs, in a 1:1 ratio. They are used to divide resources between two belts, or balance multiple belts.

Mechanics

The behavior of splitters looks simple at first glance. But they are not that simple. Splitters have an astonishing amount of uses.

  • Splitters have two input belts and two output belts. If the splitter receives items on one belt, it will split the input evenly between its two outputs.
  • If one of the outputs is fully backed-up and the splitter cannot split evenly, it will put all input on its other output.
  • Splitters can also take two inputs and one output.
  • Splitters preserve the lanes of the items, an item on the right lane is not moved to the left lane and vice versa.
  • Splitters can prioritize one input and/or one output. Clicking on a splitter opens its GUI where the priorities can be set.
  • One output of the splitter can be filtered to one item. Items of that type will only go to that output, and not to the other one. When a filter is set, the output of that side is prioritized.

In order to join/split belts, the splitter must be the same speed as the incoming belts, otherwise the splitter will become a bottleneck.

Priority

For both the input and output side of the splitter it is possible to set the priority to either left or right.

A splitter where the input priority has been set will first try to consume the specified input side, and will only consume the other input once there is a gap on the prioritized input belt.

Similarly a splitter where the output priority has been set will try to redirect all incoming items to the specified output, and will only output on the other output once the specified output is full.

Filter

If a specific item is set in the splitter's filter slot, the slider for the output priority will be used for the filter instead. All items of the set type will be redirected to that specific output and all other items are directed to the other output. The input priority can be set independently of the filter.

Balancing

Main article: Balancer mechanics

Balancers are used to evenly distribute items over multiple belts or multiple belt lanes.

Manipulating belt lanes

Underground belts

Underground belts can be used to cross different flows of items without interfering. They move items like a normal belt.

  • Underground belts can cross any number of entities and all types of ground, like water and grass. (as long as the input and output endpoints are on land)
  • Underground belts can cross other underground entities (any number of underground belts or underground pipes). They won't be mixed.
  • For the connection only the endpoints (entry-side and exit-side) are relevant.
  • The maximum distance underground is 8 tiles with express underground belts.
  • An underground belt pair of that bridges a gap of 4 tiles stores up to 44 items. An express underground belt pair at max length stores up to 72 items.
  • The half of the underground belt tile with a belt can accept input from the side. The other half (with a tunnel entrance) blocks incoming items.

Separating belt lanes

See also