Factorio Forums

• Simple
• Efficient with U-235 usage (between 0-3 unused U-235 per craft under normal conditions)
• Easily expanded
• No user input required after pasting/building a new segment (no priming or unloading)
• No circuits
• Consistent

I'm proud of this one. I made this a few years ago, forgot about it, and recently tried to find a version made by someone else on the internet. To my surprise, I found nothing comparable. Luckily, I was able to dig through old saves to find it.

It works because once the centrifuge has 40 U-235 after its "output" phase, the centrifuge will start crafting and free up inventory space for more U-238. The inserter will switch to grabbing U-238, leaving a short window for U-235 to leak through before it starts "overgrabbing" U-235.

Some notes: Inserters A and B need to be set to stack size 2. The single belt under Inserter B needs to be a red belt. The priority settings on splitters need to be set.

• If there are 40 U-235 in the machine (40 processing, 0 extra) during the output phase the setup will "leak" one U-235 (the one produced by the process.)
• If there are 41 U-235 in the machine (40 processing, 1 extra) the setup will "leak" one U-235.
• If there are 42 (or 43) U-235 in the machine (40 processing, 2 [or 3] extra) the setup will "leak" three U-235, causing the next cycle to be 40 processing and 0 (or 1) extra.
• If there are 44 U-235 in the machine (40 processing, 4 extra) the setup will "leak" four U-235.

Newly mined and newly produced U-235 will cascade down your chain of enrichers.
Copy blueprint

Very nice!

It could be compactified further by not having the output on the back.

Given the similarity in quantities between the inputs and outputs, I think it makes sense to pair up the centrifuges. This is quite small, but you can easily extend the centrifuge pairs as much as you want. That said, the only reason for kovarex is to build nukes, I can make 42 right now, and in the base game, I don't really expect to need even those.

I really like the look of this design. However, I don't understand the two green inserters between the two centrifuges which are doing Kovarex enrichment. Could you clarify what they are doing? Thanks.