Passenger train

[9Bob]

Hi gang,
I'm building a passenger railway for no reason other than to see if I could (I can't
I'm using barrels as people and the contents as destinations. So a blue barrel (water) will go to the blue station, get off, wander around on a conveyer for a bit, then come back to the blue station to go home to the main station. Trouble is I'm using a filter inserter to take barrels off the train and a regular inserter to load. Of course the train pulls in, the unloading filter inserter starts up and unloads the carriage, meanwhile the loading inserter starts putting barrels on and the unloading filter inserter takes them straight back off!

What I want is for the train to pull in, all the right barrels to be unloaded, the for the waiting barrels to be loaded and left there for departure. I'm sure this is child's play to you guys but I'm pretty much a noob and have managed to get through the game without using circuitry. So please phrase your answers accordingly.

[ColonelSandersLite]

Barrels? Why wouldn't you use bots as your stand-in for people? As outpost productivity naturally ebbs and flows, bots can use your passenger train to get from job site to job site!

In any case, I would recommend you use some very basic circuitry to do the job. Doesn't have to be all that fancy. Basically, you just need a small circuit to keep track of how many of the "passengers" are in the wandering system and only let the train unload passengers if the number of desired "passengers" is too low.

I can rig you up a demo if you like.

[9Bob]

Thanks for the advice but I need the barrels to differentiate wanted destinations. When a train pulls in to a red station ALL the red barrels get off. The waiting red barrels get on. Train leaves and gets to yellow station where ALL yellow barrels get off and waiting yellows get on. And so on until they get to "Grand Central" where ALL barrels of all colours get off and all waiting barrels get on. The quantity isn't important.
Also I realised I could load on one side and unload on another but I was hoping there's be a more elegant solution involving circuits.

[ColonelSandersLite]

Also I realised I could load on one side and unload on another

Wouldn't work. The barrels would move through, just the same as if the cargo wagon was a chest.

I was tinkering and I think I have a working design which meets your stated requirements that you can expand on. I just need to look at it again a little later with fresh eyes to make sure it's alright.

[9Bob]

You're a star.
You're also spot on about the either side idea. Failed miserably

[Nitrah]

I suspect you will want to wire up some SR latches. I saw a good YouTube video by Shredguy99 how to wire them up for emergency steam power generation.

You will want the set (to kill inserter operation) for the unloading inserter to be when the train is empty, and the reset (assuming its possible) for when the train station has no train. The loader will have the opposite.

[ColonelSandersLite]

Here you go.

Mods - Creative Mode (Fix For 0.16)
Designed for Game Version 16.36

blueprint string:

Code: Select all

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

Using this demo blueprint:
Start a sandbox map with the creative mode mod enabled.
Place the blueprint.
Place a Locomotive and a cargo wagon at Grand Central Station.

Set the locomotive's schedule:
Grand Central Station/Inactivity 5 sec
Destination A/Inactivity 5 sec

Start the Train Running.


There is one thing that jumps out at me as a potential issue that should probably be solved. I left it alone as I think it would make a pretty decent beginner project.

I make no attempt in this demonstration to set the number of barrels to any specific quantity. This could lead to a gradual build up, over a long period of time, of barrels at the first destination station. It would be a good idea to alter the circuit network to allow the train to load a maximum of about 375 barrels at grand central station.

It's not going to be critical that you do this, but it should hopefully provide some motivation to learn the basics of circuit design.

[Hedning1390]

Take a queue from real life and let passengers off before loading new ones.

[ColonelSandersLite]

That's what I did for that demo.

I controlled in/out with a 3 stage cycling system.


Stage 1: No Train
Stage 2: Unload Train
Stage 3: Load Train
Loop.

[9Bob]

Oh this works great! You are a star.
I have noticed one oddity though. If a train pulls in to a station with no barrels of the right colour aboard, the loading doesn't activate. I noticed it after I moved the unloaders to the same side as the loaders so maybe it's me.

[ColonelSandersLite]

Just guessing - That is happening specifically when the train pulls into the first passenger destination station?

If so, that's probably because there's no room for the train to load passengers. If this guess is correct, it's the same issue as the one I noted above, and is most simply solved my ensuring that loading at grand central station leaves a little room for passengers to embark down the line.

I'll take a look once I have had some sleep though.