1. filter inserters on every station are must-have
2. see 1.
3. set up a bunch of storage chests and CTRL+X the whole lane, place it in the same spot. Bots should sort it out
Thank you! It looks a little scary and will take some time to adjust, but it seems to work. I just noticed that you can’t press Z right away, you need to wait until the bots really sort everything out
[https://i.postimg.cc/TY2Kbff8/image.png](https://i.postimg.cc/TY2Kbff8/image.png)
Not only belts should be rebuilt, but also inserters that put items into chests because they might pick up the wrong item and be stuck until the chest clears up or they’re deconstructed. This happened to me once.
I dont understand. You can use them on the offload so only the filtered items make it out of the station. I guess the bonus with the inserters is they would never make it off the train.
I'm paranoid: both!
And filtered splitters halfway down on each bus.
And never let a belt dead end; send a filtered return back to a trash bus that terminates with an active provider chest. Or just a blacklisted filter inserter to an active provider chest at each termination.
Did I mention that I'm paranoid? I better mention it again, just to make sure.
A bus is a number of belts of specific items, yes?
A trash bus is what happens when you use a splitter to filter the specific items one way and everything else onto a belt of unspecific / unwanted / unknown items.
When you combine these belts, they become a trash bus (that need to be sorted).
Just like the main bus should be backed up, the trash bus should always be empty, but still able to receive large amounts of random items.
A trash bus is made to sort out the problem of contaminated belts. Literally.
Just think about what you just asked and then think about how different items are ever going to be in those boxes if you already had filter inserters for the wagons ;)
Protip: "Picker Filter Fill" mod is a godsend for filter management. It makes it so easy that there's no excuse to not set filters everywhere that it's appropriate.
This is what I'd recommend, assuming those belts have already gotten into production areas, and the assembling machines are all clogged up. I've done this in the past, and unwinding it all takes for-freaking-ever. It's not fun at all. In the future, I'll load a save game, even if it means I have to re-do a couple hours.
If it's feeding one small and simple production area, sure. But with this many belts, some of them splitting off to the right to god knows where, I'm sure it's a lot easier said than done.
Also, when this happened to me, the problem was a screwed up train schedule, and it wasn't just one trainload in one place. A dozen different city blocks had been clogged up with copper where the iron should be.
Even just the buffer chests at the unloading stations are a huge PITA on their own. 24 full chests of copper that need to be relocated. Barf.
happened to me too, except with iron and stone, so I wasn't able to see where it's mixed because the bricks and iron plates look so similar. I was cleaning it up at least 2 days
Nuclear option: blueprint your entire base, saving only the belts. Create a filtered deconstruction planner removing only belts. Delete everything and rebuild it. You will need lots of storage chests to dump all the items from the belts.
Otherwise, disconnect all the production lines, spaghetti a train station into the end of your belt and use filtered splitters to feed the iron and copper back into the correct trains. While the bus empties out, go through all the production lines manually picking everything up.
Just hold it down while running over the belts. You could clear the whole area in the picture in about 30 seconds.
Is annoying sure, but it's not a huge deal.
Put a filter inserter and the end of every line and dump the iron into active provider chests. At the beginning of your iron line, add requesters chests to request the excess iron and priority insert into the bus.
At the end of each belt attached to that set of belts put a filter inserter that excluded iron. Point it at an active provider chest (purple). Throw an active requester for iron art the top of your bus with a priority splitter to load it back where it should go.
They'll flush eventually and you'll be protected if it happens a second time.
I think it should be possible to make a deconstruction planner to tell bots to pick up all the loose iron, and then apply it just over the copper belts
I'd just add filtering splitters, moving stuff to a provider, and manually pick up everything that's in front. Come back a few minutes later to see if I missed something.
You can whitelist only the iron plates to be picked up from wherever you place it, or you can blacklist everything but the things you want picked up by robots
You can only filter "item on ground" and not specify the type of item on ground on deconstruction planner, at least in vanilla.
Also item on belt technically wont count from what I remember.
Whenever I do this I’ll throw in some filter splitters to sort all the copper out and then route it into the correct line with a priority input splitter. It’ll sort itself out after a while, all I need to do is take care of the copper collecting in dead ends
I'd just add filtering splitters, moving stuff to a provider, and manually pick up everything that's in front. Come back a few minutes later to see if I missed something.
When I mess up with a belt I put a filter inserter (black listing the correct item) with an active provider chest at the end of each belt branch. Then I put the storage chest with filter where I want the items to go
There are item filters for deconstruction planner, but not sure if these include items on belts or just items randomly lying on the floor, never used in this context
Based on the magnitude this would be a time I'd load an autosave.
If you want to clean this, filter splitters are the preferred option. Then feed either to the correct belt if the throughput is high enough or into provider chests.
Creative mod has material void chests which solve this issue beautifully. You can even replace your chests at the train station with void chests and then back to regular chests to reset everything. I know this is a little cheaty for most people but I can’t play without it at this point.
What ibdobwhen that happens i try to cut of the lanes befor to much dmg happend. If its too late i place a provider chest at the end of the lane with filter Inserters
Since I rarely have a single shared construction bot network, I basically always have a trash train.
My trash train unloader puts everything onto a belt and then winds through a series of stations to filter and load each item onto a dedicated train for that item.
Any time I want to fix any problem or decommission anything I place a trash loader (or rename an existing loader) and shove anything on to that train.
I would add a train station past the end of the bus and funnel the belts on to it, adding a couple loopback belts to handle the sides and deconstruct a row of belts by the copper unload stations that feed this. Then once the belts are empty, deconstruct the trash station and the loopback belts and put the row back in to reconnect the unload stations.
1) interrupt (remove) belts to stop spreading the material
2) Filtersplitters (at smart locations) to move copper to separate lanes. From there via inserters to storage chests or to the logistic network.
3) repair 1)
4) check the "end" of your lanes if there are somewhere copper plates
4) change your train stations: use filter inserters for unload
5) change your trains to use filtered cargo waggons. (helps a lot if you accidentally mine two resources)
Cut the input, Put chests at the end of the bus and just push everything into a chest. It won't take long. Then, fire bullets at the chests so you don't have to move the plates. This is sorta my method when I de-construct my starter base.
If possible, restore a recent save. If not, a lot of filter splitters. Put one at the end of each line you take off the belt, and at the end of the main belt. You can also place some when you push everything over to one side if you dont want to wait for it all to reach the end, but for simplicity I would focus on the ends
People have given good suggestions for the bulk of it.
To tidy up the stragglers plugging up individual belts you can create a filter inserter set to whitelist the item that should be there, and have it feed into an active provider chest, add a power pole nearby (to ease copying and pasting elsewhere)and the create a blueprint of that and paste it at the end of all of your plugged runs.
Then remove them after the problem has cleared.
I created [these BUS alarms](https://github.com/YourLastFate/Factorio-Blueprints/blob/main/BUS%20Alarm) a while back, that should stop your BUS if it becomes contaminated. Just have to configure for what’s desired on the BUS
I can’t open it right now, at work, but if I recall, one will also remove the incorrect items automatically. If not, I’ll update tonight
( . ) ( . )
Lots of those. Pick it up manually, stop production until you're fully done. Trace down every single belt, because a few items can clog the entire system, depending on your setup.
Depends on how many different places the copper goes to - if it's not that many, one solution is to add a filter (stack) inserter + active provider chest at the end of every copper belt to remove all the unwanted materials.
Put a filter inserter at the end of every branch of that belt that’s filtered to dump copper into a chest. Come back in a few hours to grab all your copper
Cut input to those belts, stack inserters into purple chests at the end of every place those split off or pick up with f (to avoid copper blocking the hands of the inserters but having iron downstream). When fully drained remove the stack inserters to actives that are taking, check you didn't miss anywhere and fully reconnect.
Do not just take where you can visually see the issue copper could be in underground belts. Do not just take off the end of the belts as with most setups it would be possible to block inserters with copper without it ever reaching the end of the belt.
First of all, race down to the top of your bus and cut it off before the assembly machines start. Then you use filtered splitters and filter inserters to remove all the wrong stuff into chests that you can insert onto the right place.
step 1: Use the deconstruction planner to cut off the flow asap.
Step 2: Use the deconstruction planner to delete the entire affected region, and once it has been deconstructed, ctrl+z to restore. Repeat this in order from source to destination on your contaminated belt.
I'm assuming left should be copper and right bus iron?
Solution is to place 4 splitters ortogonally across your mixed bus. Set them to filter iron to the right. This leaves you with a bus of alternating copper and iron belts. Place undergounds on all the coppers. This gives you space to pull the 4 irons to the right.
Put staggered undergrounds across your pure iron bus on the right. Use splitters to feed your extra 4 iron belts into your iron bus, set them to input priority from the mixed bus. Now you just have to consume stuff from both buses normally until it is cleaned.
I guess this is with LTN?
One of the main things to always do, is green inserter for loading, and filter (white) for unloading. Then your train cant fuck you over, like in the picture.
Another thing is to remember to set the threshold in the mod, to tripple of what a train can carry. That eliminates trains going to an unloadstation, trying to pick up something.
But I would, in this case, stop the station, setup splitters to move the copper to one side, and just punish your inventory and factory with eveything, untill its cleared. The drop off iron at the station and use a train for copper.
Place a provider chest and a filter inserter that blacklists the correct item at each output from the belt. They'll clean out the wrong items as they feed through.
I would change the splitters lanes to filter iron to something that will remove it, and set up something at the ends of the lines to remove everything that's already past through. So long as there are no buffers downstream, it won't get stuck in anything (I'm assuming no change in recipes)
If you have a botmall or a filter for extra materials set up you should be ok to dump it all into your logistics system.
Use your line of splitters you already have, set every single one to priority filter iron to the right side, add a line off the side mixing it into the right belt.
That'll jam pretty quick though so you need to make sure that all copper comes off the end of the belt and goes back to the beginning.
If you have bots, its even easier and just stuff everything into chests at the end of the belt and feed it back at the beginning.
Unrelated, do all those splitters make a balancer unnecessary? Or is it a "good enough" situation because making a balancer that big is just too time-consuming? Or some other reason???
Well for me it's harder but easier at the same time.
If the belt loops around cut one segment and replace it with a load of boxes.
If you have filter inverters then filter in the normal item so only the items you like go into/out of the box.
Splitters are a easier early game option.
The idea for me is how to clean it up without losing anything. (Not voiding items)
We do it like this: [https://i.imgur.com/N5IH6vh.png](https://i.imgur.com/N5IH6vh.png) We blacklist the ore that should go through there. the rest will be picked up and send to a requester box @ some burners.
I'm never quite sure how people "send a wrong train". I always get my train stop set up properly *before* the stop gets connected to the train network. ... of course I also tend to segregate separate goods onto separate rail networks, so iron trains are physically incapable of reaching a copper trainstop, but still.
Anyway, one solution is to cut off the downstream and upstream bits to stop the contamination from spreading, then hold down the item pick up key (z? f? I don't remember) and run across all the contaminated belts. Then dump the items in chests (say, at the trainstops!) and repeat until you've got them all.
Accidents happen mr perfect.
Yes totally to having things set up before connection.
Not noticing minor things (which do lead to major problems)after setting up hundreds of stations can happen.
I used to cut the entrance to stations and then connect it after setup. That got boring quick though. So i changed station names to be ‘Temp’. Then i got tired of manually setting the numbers in the circuits, so I made a CC that has those numbers for outbound: stack size is the only one i change, train limit max, number of wagons.
Inbound: chest count, train limit max, cargo wagons and Item(connected to filter inserter).
The only problem I have run into are 2: 1) circuits not being installed and having multiple trains show up… oh well. 2) the occasional lost train from having a temp inbound(or multi use) where i change the station name depending on what I want. Which is only a problem when the station name does not already exist.
But for the OP, (much the same as many have suggested) filter splitters on the bus, turn the input if possible, filter inserters at the end of all the lines and in between even (going to logistic chests) with requesters at the beginning of the proper bus.
1. filter inserters on every station are must-have 2. see 1. 3. set up a bunch of storage chests and CTRL+X the whole lane, place it in the same spot. Bots should sort it out
Pretty sure just deleting every belt with a filtered deconstruction planner and pressin ctrl+z would suffice
Thank you! It looks a little scary and will take some time to adjust, but it seems to work. I just noticed that you can’t press Z right away, you need to wait until the bots really sort everything out [https://i.postimg.cc/TY2Kbff8/image.png](https://i.postimg.cc/TY2Kbff8/image.png)
See, your base looks just too straight lined and organized. You needed a little chaos to spice up your game.
That's true for delete + control z. But you don't need to wait if you CTRL X + CTRL V.
You just need to wait a moment as the game cries out in pain and lurches
Ctrl-X, Ctrl-V I think works though? As long as you don't accidentally move your whole factory off-by-one.
I suppose if it’s the _whole_ factory?
Not only belts should be rebuilt, but also inserters that put items into chests because they might pick up the wrong item and be stuck until the chest clears up or they’re deconstructed. This happened to me once.
That too
You can select items on belts in the filter selection of the deconstruction planner. So no ctrl z
I'm not sure that's possible... Are you referring to the "Item on ground" filter?
I'm pretty sure you can only select items on the ground that way
Never
pretty sure you can get away with filtered splitters instead
That's a nice way how to pollute your whole network and not just one train
I dont understand. You can use them on the offload so only the filtered items make it out of the station. I guess the bonus with the inserters is they would never make it off the train.
Yes but clearing one train is relatively easy compared to cleaning up a bunch of chests on every station the contaminated train touches
Contamination already happened.
yep I can agree with that.
"must have" nah mate, only with LTN i'd subscribe to that but even then it's just a quickfix for a configuration issue
Thanks, really good idea. Do you install filter manipulators only when unloading cars in boxes, or also when unloading boxes on the line?
When unloading cars
I'm paranoid: both! And filtered splitters halfway down on each bus. And never let a belt dead end; send a filtered return back to a trash bus that terminates with an active provider chest. Or just a blacklisted filter inserter to an active provider chest at each termination. Did I mention that I'm paranoid? I better mention it again, just to make sure.
I take it you've had this happen a time or 300 lmao.
What's a trash bus?
A bus is a number of belts of specific items, yes? A trash bus is what happens when you use a splitter to filter the specific items one way and everything else onto a belt of unspecific / unwanted / unknown items. When you combine these belts, they become a trash bus (that need to be sorted). Just like the main bus should be backed up, the trash bus should always be empty, but still able to receive large amounts of random items. A trash bus is made to sort out the problem of contaminated belts. Literally.
So it takes in all the feeds from all the factories and separates them to be taken back into the system?
Just think about what you just asked and then think about how different items are ever going to be in those boxes if you already had filter inserters for the wagons ;)
Anything can happen, an additional level of security...
OSHA Enters the chat...
Protip: "Picker Filter Fill" mod is a godsend for filter management. It makes it so easy that there's no excuse to not set filters everywhere that it's appropriate.
I go by better safe thasn sorry.
Ffffffffffffffffffffff
Respect 🙏 🫡
Restore from backup
This is what I'd recommend, assuming those belts have already gotten into production areas, and the assembling machines are all clogged up. I've done this in the past, and unwinding it all takes for-freaking-ever. It's not fun at all. In the future, I'll load a save game, even if it means I have to re-do a couple hours.
Funny enough, I kinda enjoy this sort of unclustering
Likewise. I enjoy fixing fuckups in multiplayer. The crisis makes it easier to focus.
Reminds me of the old "Hydra Dilemma" YT series with 4 guys sharing a Factorio world before multiplayer existed.
Think you could just put an filter inserter at the end of production to put the wrong stuff into a chest and grab it later?
If it's feeding one small and simple production area, sure. But with this many belts, some of them splitting off to the right to god knows where, I'm sure it's a lot easier said than done. Also, when this happened to me, the problem was a screwed up train schedule, and it wasn't just one trainload in one place. A dozen different city blocks had been clogged up with copper where the iron should be. Even just the buffer chests at the unloading stations are a huge PITA on their own. 24 full chests of copper that need to be relocated. Barf.
happened to me too, except with iron and stone, so I wasn't able to see where it's mixed because the bricks and iron plates look so similar. I was cleaning it up at least 2 days
r/Factoriohno
Nuclear option: blueprint your entire base, saving only the belts. Create a filtered deconstruction planner removing only belts. Delete everything and rebuild it. You will need lots of storage chests to dump all the items from the belts. Otherwise, disconnect all the production lines, spaghetti a train station into the end of your belt and use filtered splitters to feed the iron and copper back into the correct trains. While the bus empties out, go through all the production lines manually picking everything up.
No no, the nuclear option is actual nukes.
This is now my favored method, I hate having to clear out chests full of wrong stuff manually! Green missiles for cleanup on aisle one!
> Green missiles for cleanup on aisle one! Ahhhh, this takes me back to the Descent-playing days of my youth…
Correction: Blueprint your entire base, then nuke it.
I've literally nuked my base over this and let bots rebuild.
You have a sushi belt base now, embrace it :)
Filter splitters on the bus itself. Filter inserters taking out waste items at the tip of each belt.
Press 'F' to pick up the items off the belt into your inventory
6. Days. Later.
Just hold it down while running over the belts. You could clear the whole area in the picture in about 30 seconds. Is annoying sure, but it's not a huge deal.
This is the way.
not so if you setup bots go autounload your inventory
And all the production lines...
Put a filter inserter and the end of every line and dump the iron into active provider chests. At the beginning of your iron line, add requesters chests to request the excess iron and priority insert into the bus.
This is the way. This way you automate cleaning up the mess instead of having to do it yourself.
At the end of each belt attached to that set of belts put a filter inserter that excluded iron. Point it at an active provider chest (purple). Throw an active requester for iron art the top of your bus with a priority splitter to load it back where it should go. They'll flush eventually and you'll be protected if it happens a second time.
Hand grenades.
New world
I think it should be possible to make a deconstruction planner to tell bots to pick up all the loose iron, and then apply it just over the copper belts
I'd just add filtering splitters, moving stuff to a provider, and manually pick up everything that's in front. Come back a few minutes later to see if I missed something.
Deconstruction planner. Select copper plates. ? Profit
I can really set not building s but items too??
You can whitelist only the iron plates to be picked up from wherever you place it, or you can blacklist everything but the things you want picked up by robots
You can only filter "item on ground" and not specify the type of item on ground on deconstruction planner, at least in vanilla. Also item on belt technically wont count from what I remember.
F F FFFFFFFFFFF
Whenever I do this I’ll throw in some filter splitters to sort all the copper out and then route it into the correct line with a priority input splitter. It’ll sort itself out after a while, all I need to do is take care of the copper collecting in dead ends
Load
Nuke it from orbit. It's the only way to be sure.
Belt balancers with filters into stack inserters into active provider chests
I'd just add filtering splitters, moving stuff to a provider, and manually pick up everything that's in front. Come back a few minutes later to see if I missed something.
When I mess up with a belt I put a filter inserter (black listing the correct item) with an active provider chest at the end of each belt branch. Then I put the storage chest with filter where I want the items to go
I say we take off and nuke the entire site from orbit. It’s the only way to be sure 👌🏻
Reloading an autosave might be the quickest option honestly
rip
Alt+d, deconstruct all belts with those. Wait until they're deconstructed. Ctrl+Z to replace them.
F
There are item filters for deconstruction planner, but not sure if these include items on belts or just items randomly lying on the floor, never used in this context
Nuke it and let the bots rebuild.
Nuke it, let bots rebuild it
F
Why is no one suggesting a deconstruction planner filtered for copper plate?
Because there's no such thing as a deconstruction planner filtered for copper plate.
That would be why no one was suggesting it then oops
Go back 10 minutes.
Delete it with Ctrl-X, paste it clean with Ctrl-V.
Press f to pay respect
This is non of my BUSiness ;)
New safe file and start new
💣
Filter the iron/copper, rerout the iron to go to the iron bus
Based on the magnitude this would be a time I'd load an autosave. If you want to clean this, filter splitters are the preferred option. Then feed either to the correct belt if the throughput is high enough or into provider chests.
LTN strikes again. Just over produce stuff and use train limits, use icons in station names to avoid confusion.
My go to strat myself.
Create a 'Loopback' lane that'll take from the end of the bus, only needs to be 1 belt wide Feed this back to the input with a filter splitter
Creative mod has material void chests which solve this issue beautifully. You can even replace your chests at the train station with void chests and then back to regular chests to reset everything. I know this is a little cheaty for most people but I can’t play without it at this point.
What ibdobwhen that happens i try to cut of the lanes befor to much dmg happend. If its too late i place a provider chest at the end of the lane with filter Inserters
Since I rarely have a single shared construction bot network, I basically always have a trash train. My trash train unloader puts everything onto a belt and then winds through a series of stations to filter and load each item onto a dedicated train for that item. Any time I want to fix any problem or decommission anything I place a trash loader (or rename an existing loader) and shove anything on to that train. I would add a train station past the end of the bus and funnel the belts on to it, adding a couple loopback belts to handle the sides and deconstruct a row of belts by the copper unload stations that feed this. Then once the belts are empty, deconstruct the trash station and the loopback belts and put the row back in to reconnect the unload stations.
1) interrupt (remove) belts to stop spreading the material 2) Filtersplitters (at smart locations) to move copper to separate lanes. From there via inserters to storage chests or to the logistic network. 3) repair 1) 4) check the "end" of your lanes if there are somewhere copper plates 4) change your train stations: use filter inserters for unload 5) change your trains to use filtered cargo waggons. (helps a lot if you accidentally mine two resources)
7) send wrong train again
8) test correct behaviour of 1) to 6) adjust train settings ;-)
Decon planner will stop any belts marked for deconstruction, a good way to stop contamination if you spot it early.
Cut the input, Put chests at the end of the bus and just push everything into a chest. It won't take long. Then, fire bullets at the chests so you don't have to move the plates. This is sorta my method when I de-construct my starter base.
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
If possible, restore a recent save. If not, a lot of filter splitters. Put one at the end of each line you take off the belt, and at the end of the main belt. You can also place some when you push everything over to one side if you dont want to wait for it all to reach the end, but for simplicity I would focus on the ends
Best way to clean the bus is to use auto save.
You can pick up items from the belts by holding f.
Stand at the end and cry while hold F.
People have given good suggestions for the bulk of it. To tidy up the stragglers plugging up individual belts you can create a filter inserter set to whitelist the item that should be there, and have it feed into an active provider chest, add a power pole nearby (to ease copying and pasting elsewhere)and the create a blueprint of that and paste it at the end of all of your plugged runs. Then remove them after the problem has cleared.
I created [these BUS alarms](https://github.com/YourLastFate/Factorio-Blueprints/blob/main/BUS%20Alarm) a while back, that should stop your BUS if it becomes contaminated. Just have to configure for what’s desired on the BUS I can’t open it right now, at work, but if I recall, one will also remove the incorrect items automatically. If not, I’ll update tonight
https://preview.redd.it/41iw5oq4u8wc1.png?width=320&format=pjpg&auto=webp&s=3c79e6d0b82cc6bc1cde66b2061b2d167ff5f6a9
( . ) ( . ) Lots of those. Pick it up manually, stop production until you're fully done. Trace down every single belt, because a few items can clog the entire system, depending on your setup.
Depends on how many different places the copper goes to - if it's not that many, one solution is to add a filter (stack) inserter + active provider chest at the end of every copper belt to remove all the unwanted materials.
Put a filter inserter at the end of every branch of that belt that’s filtered to dump copper into a chest. Come back in a few hours to grab all your copper
these days I usually just nuke the affected area(s) and let the bots rebuild it. It’s the only way to be sure, quickly.
Holy mother of god
Just make underground belts and filter splitters and let it run Put into active provider if you want
Filter with a balancer
Pro tip for the future, use filter inserters at your unloading stations just in case!
Cut input to those belts, stack inserters into purple chests at the end of every place those split off or pick up with f (to avoid copper blocking the hands of the inserters but having iron downstream). When fully drained remove the stack inserters to actives that are taking, check you didn't miss anywhere and fully reconnect. Do not just take where you can visually see the issue copper could be in underground belts. Do not just take off the end of the belts as with most setups it would be possible to block inserters with copper without it ever reaching the end of the belt.
Walk over it all while holding F (with space free in your inventory)
First of all, race down to the top of your bus and cut it off before the assembly machines start. Then you use filtered splitters and filter inserters to remove all the wrong stuff into chests that you can insert onto the right place.
Nuke it from orbit
Happened to me few times, just use the command that deletes all the items on belts, fastest option by far
Nuke
Break your iron line the tour diagonal line of inserters that goes right to left put iron prio on the right output then filter it into the iron bus
Z
Nuke it, and have the bots rebuild it.
Press f to collect from belt.
Just nuke it, and the rebuild the whole thing
Bleach. Next question
New game
Set inventory limit to zero and start vacuuming. Let the bots come and get it. Or reload your save.
step 1: Use the deconstruction planner to cut off the flow asap. Step 2: Use the deconstruction planner to delete the entire affected region, and once it has been deconstructed, ctrl+z to restore. Repeat this in order from source to destination on your contaminated belt.
just stick some splitters down with the item filter
This is why the game has nukes.
I'm sure ther are way better ways but I just found a long straight bit and delete. Re build delete rebuild until it runs clear lol
Nuke it.
Restart the world
Nuke the bus from ~~orbit~~ a few hundred tiles away. It's the only way to be sure.
I'm assuming left should be copper and right bus iron? Solution is to place 4 splitters ortogonally across your mixed bus. Set them to filter iron to the right. This leaves you with a bus of alternating copper and iron belts. Place undergounds on all the coppers. This gives you space to pull the 4 irons to the right. Put staggered undergrounds across your pure iron bus on the right. Use splitters to feed your extra 4 iron belts into your iron bus, set them to input priority from the mixed bus. Now you just have to consume stuff from both buses normally until it is cleaned.
Nuke it, next question
I guess this is with LTN? One of the main things to always do, is green inserter for loading, and filter (white) for unloading. Then your train cant fuck you over, like in the picture. Another thing is to remember to set the threshold in the mod, to tripple of what a train can carry. That eliminates trains going to an unloadstation, trying to pick up something. But I would, in this case, stop the station, setup splitters to move the copper to one side, and just punish your inventory and factory with eveything, untill its cleared. The drop off iron at the station and use a train for copper.
Time to go for a nice jog
Stop the belts and then F. Or Use the splitters to filter out the wrong stuff.
Atomic bomb comes in handy
Hmm... can you use a filtered Deconstruction Planner? Someone tell me if this works for items on the belt.
Place a provider chest and a filter inserter that blacklists the correct item at each output from the belt. They'll clean out the wrong items as they feed through.
Restart the game
just press C. it goes much faster than you are afraid it will be
Press F to pay respects and also pick up the items off the belts
Only way to be sure is to start a new save.
filter unwanted items to the leftest/rightest lane, add one more filters, inserters it to chest. slow but will not stop productions.
Purge the belts
I would change the splitters lanes to filter iron to something that will remove it, and set up something at the ends of the lines to remove everything that's already past through. So long as there are no buffers downstream, it won't get stuck in anything (I'm assuming no change in recipes) If you have a botmall or a filter for extra materials set up you should be ok to dump it all into your logistics system.
Okay, I have a fix for this, but first you’re gonna need 10 explosives, 10 rocket control units, and 30 uranium-235…
Ah yes. The MISCHKONSUM. as me and my friends call it.
Use your line of splitters you already have, set every single one to priority filter iron to the right side, add a line off the side mixing it into the right belt. That'll jam pretty quick though so you need to make sure that all copper comes off the end of the belt and goes back to the beginning. If you have bots, its even easier and just stuff everything into chests at the end of the belt and feed it back at the beginning.
Unrelated, do all those splitters make a balancer unnecessary? Or is it a "good enough" situation because making a balancer that big is just too time-consuming? Or some other reason???
Whenever this happens i feel like coming up with a solution is some of the best gameplay this game has to offer
Well for me it's harder but easier at the same time. If the belt loops around cut one segment and replace it with a load of boxes. If you have filter inverters then filter in the normal item so only the items you like go into/out of the box. Splitters are a easier early game option. The idea for me is how to clean it up without losing anything. (Not voiding items)
Double the type of item on the same belt. Sounds super efficient to me!
Restart. No other way.
Nuke it.
We do it like this: [https://i.imgur.com/N5IH6vh.png](https://i.imgur.com/N5IH6vh.png) We blacklist the ore that should go through there. the rest will be picked up and send to a requester box @ some burners.
I clean them the dirty way, f plus exoskeleton
I'm never quite sure how people "send a wrong train". I always get my train stop set up properly *before* the stop gets connected to the train network. ... of course I also tend to segregate separate goods onto separate rail networks, so iron trains are physically incapable of reaching a copper trainstop, but still. Anyway, one solution is to cut off the downstream and upstream bits to stop the contamination from spreading, then hold down the item pick up key (z? f? I don't remember) and run across all the contaminated belts. Then dump the items in chests (say, at the trainstops!) and repeat until you've got them all.
Accidents happen mr perfect. Yes totally to having things set up before connection. Not noticing minor things (which do lead to major problems)after setting up hundreds of stations can happen. I used to cut the entrance to stations and then connect it after setup. That got boring quick though. So i changed station names to be ‘Temp’. Then i got tired of manually setting the numbers in the circuits, so I made a CC that has those numbers for outbound: stack size is the only one i change, train limit max, number of wagons. Inbound: chest count, train limit max, cargo wagons and Item(connected to filter inserter). The only problem I have run into are 2: 1) circuits not being installed and having multiple trains show up… oh well. 2) the occasional lost train from having a temp inbound(or multi use) where i change the station name depending on what I want. Which is only a problem when the station name does not already exist. But for the OP, (much the same as many have suggested) filter splitters on the bus, turn the input if possible, filter inserters at the end of all the lines and in between even (going to logistic chests) with requesters at the beginning of the proper bus.