There's definitely enough coal for it to grab, yet it doesn't:
![Image](https://forums.factorio.com/images/ext/1d3bdeae84b3c0aef3d7720b6c621cd7.png)
I attached the save, it should move 5 iron ore and die. Removing and re-placing it does not fix it!
It's supposed to grab coal and fuel itself when it runs low, though. The two inserters above it seem to work correctly.sillyfly wrote:A burner inserter only fuels itself if it picks up fuel for what's in front of it. If the furnace has more than 5 coal, or a different fuel source altogether, the inserter won't pick up the coal in the first place.
That is only what the wiki says. In reality, it only puts burnable fuel into itself if it happens to coincidently pick some up under normal circumstances.Zeblote wrote:It's supposed to grab coal and fuel itself when it runs low, though. The two inserters above it seem to work correctly.sillyfly wrote:A burner inserter only fuels itself if it picks up fuel for what's in front of it. If the furnace has more than 5 coal, or a different fuel source altogether, the inserter won't pick up the coal in the first place.
I made a mod a whiole ago to fix this: https://forums.factorio.com/forum/vie ... 92&t=14634Zeblote wrote:It's supposed to grab coal and fuel itself when it runs low, though. The two inserters above it seem to work correctly.sillyfly wrote:A burner inserter only fuels itself if it picks up fuel for what's in front of it. If the furnace has more than 5 coal, or a different fuel source altogether, the inserter won't pick up the coal in the first place.
Hmmm seems like this has changed with the belt optimisations. It should work as expected starting with the next release. That means that burner inserter when low on energy will always try to fuel itself first (when taking stuff from the belt or entity).Zeblote wrote:Hmm. That was indeed the problem, I'll have to remember not to dump coal in furnaces while they still use burner inserters.
I think it should be changed so it will always grab coal if it's low on fuel and coal is on the belt it's grabbing from.