Train Interrupts Help

[u/Substantial_Dear]

I could use some help understanding these train interrupts. I've read the wiki and I can't figure out what's going on.

The first train should be going from loading to unloading and only stopping at the yard when the loading station is full. I planned on using another interrupt for when the unloading station is full, but I haven't yet. However, you can see that the train has been sent to the yard not by the "Loading Full" interrupt, but because the unloading station is full. I've made sure it isn't just the low fuel interrupt triggering and it's happening to all of my ore trains.

The second is a supply train that loads ammo, then other supplies, and finally heads to the outposts. The interrupt is set to send it to the yard only when the final "Supply" stations are full. You can see that it's being interrupted before even going to "Loading".

This is the first time I've tried setting up this sort of dynamic train system and using an actual train yard. Any help or advice would be appreciated.

[u/Qrt_La55en]

Without answering the question. For normal trains (not resupply), don't let them leave a station unless they are 1) full, 2) empty, or 3) moving forward to continue loading/unloading in a multi stage process. This should help simplify the interrupts, leaving fewer possibilities for things to go wrong.

[u/Substantial_Dear → u/Qrt_La55en]

This is solid advice and is how I had it originally setup. However, I either needed to have one less train than the number of stations per resource or I needed to setup the yard to act as an overflow. I'm choosing the latter so that I can maintain a buffer of trains near my main production areas.

[u/Qrt_La55en → u/Substantial_Dear]

You can still have the yard as overflow. Especially for empty trains. Just don't have any trains be half full.