Self regulating factory - low tech

[SQLek]

Because it is far easier to make factory when You have factory.

At the beginning we all do simple belt-bus-factory and it works.
We get electricity and get some science packs.
Many of us stick to it until logistics arrives.
Many of us experiment with circular factories to get factory-build-essentials.

At the beginning there was belts

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But what if You could get some of logistic luxuries without logistics and with easy migration?

What You need:
- circuit network unlocked as well as underground belts and filter inserters.
- some circuit wire (i'm using green - red one for request system - but this in another thread maybe later) integrated with Your electric system.
- one extra belt in bus - thing of it "essentials" or "misc".
- some space on end of bus to do a loop with chests and filter inserters to collect essentials in one place, preferable where Your character spend most time for easy of pick up.

So let start with pickup zone:

Pickup zone

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So we need assemblers, lots of assembler. We need make ammo, turrets, boilers and splitters, and it should be assembled asap... so we need lots of asaping assemblers
We use constant combinator to set expected value as a negative number. Chest sends to network it content. If result is negative, factory knows it needs assemble it.

Now lets see how system is integrated on assember side:

Assembler side

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Inserters are on output. It allows chaining of assemblers but also means there will be resources inside.
Basicaly if balance is negative, items will be ejected into "misc" bus and sorted&collected in pickup zone.

But we need more than assemblers! From lights to walls. From turrets to furnaces. Megafactory awaits.
And this design get You covered in Your building-factory-stuff:

everything covered

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And who sad You can't have multiple constant combinators?

Bootstrap factory looks like this:

done factory

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Non-logistic trash slots/chest
- in progress

Science labs integration
- in progress - idea is to get as low science packs on belt as possible without staling research - research pack on belt is resource that is not working.

Request bus:
- in progress - will be handy to make electric engines or modules

Reffinery integration:
- in progress

Soooo what do You think?
Constructive criticism also welcome.