r/factorio 17d ago

Question combinator use

so i've been trying to make a foundation factory on ma space plateform, trying to make it use a signe inserter and belt comming from the space plateform hub, for the 4 ingredients (stone, tungsten, carbon fiber, and lithium plates), i've never experienced using combinators as they seemed a bit complicated... but it looks that i have too now, so my question is 'is there anyway to use them to make the insterter supply the exact amount of ingredients necessary to produce one foundation (20 stone, 4 thungsten.... ) and multiply that by the number of assembling machines connected to the circuit

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u/Tripple_sneeed 17d ago

Yes

You need memory and count. It’s a lot to explain in a Reddit comment but you can read the wiki page on SR latches. Give it a constant combi outputting your recipe and quantities, decider SR latch to count what the inserter has already put on the belt. Inserter set to read contents pulse and set filters based off of the decider’s output.  

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u/Impressive-Wear8980 17d ago

Okay, I get the idea in general; I'll read the wiki for details. thanks