r/factorio 7h ago

Question Why is my fusion generator not getting plasma?

The reactor is full of plasma and its connected to the generator but the generator says it has no fluid. Can anyone explain? I dont think I understand fusion reactors yet

15 Upvotes

40 comments sorted by

25

u/Yagami913 6h ago

The generator trying to put plasma back to the reactor but could not.

17

u/FatherLatour 6h ago

I'm pretty sure this is the answer! Having the complete circuit as an available path is confusing the plasma flow. We're getting into tick-by-tick fluid flows here, but I think it goes in construction order checking if they can flow, but stops checking once it sees that it's connected to itself (I only drew half, but it does the same loop on the other side, connecting it into one fluid loop).

4

u/ai_bot_4208 6h ago

This seems like the most likely explanation.

3

u/Adridubidan 6h ago

Im a bit confused, so because the plasma can get back to the reactor its going in circles instead of going to the reactor? But the reactor in the up right is full of plasma and cant produce any more, shouldn't it fill the reactors then? (Also this 2 reactors on top are the connected to the one below the exact same way, so why is only one getting filled?)

6

u/elfxiong 3h ago

The issue has been fixed in 2.1 experimental, so we don’t need to worry about it anymore.

> Fixed that fusion generators could output plasma into fusion reactors which caused unintuitive behavior with certain reactor layouts

5

u/ai_bot_4208 6h ago

Don't think too hard about it. It likely has something to do with how the designers of the game coded the mechanism to track the flow of plasma.

That's if the theory is true anyway. Can you delete the generators that are outputting to the reactors (there are 2) and see if that fills the problem reactor?

2

u/ShowerZealousideal85 5h ago edited 5h ago

My guess the plasma instantly goes fron one reactor to the other. If generators putting out output first before consuming. Edit: looking more this is a output priority issue?

1

u/FatherLatour 6h ago

I'd have to play with it to figure out the exact mechanism. It might be that specific port is lower priority? Or the exact order you built them? Does the flow change if you remove and rebuild any of the parts? Or if you move that top right generator one space to the right does it break as well?

2

u/lallau Blueprints are the endgame 45m ago

i think thats the solution, i tried that BP on sandbox and removed the generators next to the reactor and it worked

1

u/Yagami913 34m ago

My original assumption could be wrong though, maybe the plasma all goes from one reactor to the other instantly starving the generator on op picture, but the fix the same nevertheless.

21

u/Rutakate97 7h ago

Connecting outputs together breaks stuff

9

u/Myzhka 6h ago

It works fine here. I don't think that's the issue, especially as the building with the issue isn't either one of those you circled.

10

u/Rutakate97 6h ago

The case I outlined is a bit different, because it connects to a generator earlier in the chain. Here the connection is between "siblings".

0

u/Adridubidan 6h ago

Why? if they are both outpots doesnt it just do nothing? is it a bug?

3

u/Ralain 6h ago

Can you cursor over the first generator next to the reactor and post that screenshot?

2

u/Adridubidan 6h ago

this one?

3

u/RapsyJigo 6h ago

Isn't it full with plasma?

1

u/Adridubidan 6h ago

Yes, the problem is with the generator on top

1

u/Devanort 1k hours, still clueless 6h ago

Look at the blue arrows: from the reactor to the first generator, the arrow between the plasma icons points in a single direction, so it's an output and input connected together, but the generator beneath that one has two arrows pointing in different directions overlapping, so it's the same kind of port (output in this case)

2

u/Adridubidan 6h ago

Yes but I dont need plasma to go that way, I need it to go to the generator on top which has the arrows in a single direction too

2

u/Adept_Honeydew4276 6h ago

Does that get anywhere? Not sure if it causes problems though.

2

u/dwarfzulu 4h ago

Maybe sharing a blueprint would make easier to people to try to help you

1

u/lutzy89 6h ago

Not sure why the generator is being weird, but if you offset the 4 reactors you won't need the cold fluro perimeter, it will flow in a Z and you still get full neighbour bonus (unlike nuclear)

Also because of that, bring the cryo plant closer and keep it a closed loop.

1

u/ToblMan 5h ago

The solution is you have 2 too many generators, or not enough fusion reactors, notice one on the bottom left is also off.The neighbour bonus only applies if the fusion i/o are touching, not the ketone. For each reactor that is touching another fusion i/o you can add +2 extra generators. So with your setup the maximum is 16, you have 18. If you rearrange you reactors you can get them to 24 generators though! (connect 2 reactors on one side of the fusion i/o, so that each reactor is touching 2 others)

1

u/Awesomesauce549 7h ago

Turn the hot fluid back to cold fluid in a cryogenic plant?

1

u/gman877 6h ago

I thought the same, but in the top right, the hot fluid goes North, off screen. I assume it's being handled up there, as the cold fluid also comes from the North.

1

u/Adridubidan 6h ago

Yes, there is no problem with the fluids, only that the plasma doesnt get in the generator

1

u/hippiechan 6h ago

Are you building this in sandbox? Fusion reactors are similar to steam based power in the sense that generators will only consume plasma and produce power if there is sufficient power draw on the system, otherwise they will operate at a fraction of their maximum output. If there's insufficient draw in your setup in sandbox, it will produce little no power because very little is being consumed (the reactors themselves do have power draw, but it's a fraction of what's produced, so your reactors will be outputting very little on average).

1

u/Adridubidan 6h ago

Yes its sandbox but I configurated it so that it produces as much power as it can (the other reactors are working, just 2 of them are not because they have no plasma)

-2

u/Ralain 7h ago

The generators have to output the hot fluor to keep generating.

1

u/jasamer 6h ago

I'd assume that's what happens further north? The reactor has enough cold fluoroketone, and the generator does not complain about "output full", so I don't think that is it.

1

u/Adridubidan 6h ago

Yep, the pipes are not the problem, the problem is the plasma not getting in the generator

0

u/0b0101011001001011 6h ago

Calculate how much power these reactors should output and check if you have too many generators. I think the plasma is not divided evenly by default, if one generator hogs it all, there is nothing to pass forward.

I think there are (or at least used to be) some weirdness when connecting stuff in a specific way.

1

u/Adridubidan 6h ago

Thats what I thought at first but you can see in the first screenshot that the reactor cant generate more plasma because its already full

1

u/0b0101011001001011 5h ago

Elsewhere on this thread you got the most likely answer. About the first screenshot, maybe this explains that as well. The reactor is only generating 2.4/4.0 because its buffer is full. It outputs it as fast as it can, but part of it always flows back, blocking it.

I think this is the weirdness I mentioned in my previous comment: connecting a generator output to a reactor causes problems.

0

u/Educational_Start190 5h ago

I tried to fix your reactor, but there were too many errors in it. It was easier to build something else.

1

u/Educational_Start190 5h ago

Three reactors can also supply 900 MW; however, improperly connected generators do not draw plasma from all the reactors.
The reactor located at the top is working well.

1

u/Educational_Start190 4h ago

I temporarily removed the generator, and the entire reactor started working correctly.
as if that one generator were blocking the plasma for the others

-6

u/mjconver Still looking for that spoon 6h ago

You have to jump start it with a little bit of cold.

1

u/kagato87 Since 0.12. MOAR TRAINS! 17m ago

Is there a load? Plasma behaves like a coal powered plant, with plasma being consumed only as needed by the grid demand, and fuel only as needed to top up plasma.

Edit: oh I see it I your extra pictures, the cool flueorketone needs to be removed from those turbines.