Conveyor Belt Troubleshooting in Core Keeper

#Direct Answer

When a Conveyor Belt line fails, test it in four parts: direction, gaps, pickup, and destination. Remove every branch except one short belt, send one cheap item through it, and add machines back only after that test passes. Rebuilding the entire factory first usually hides the original fault.

#A five-minute isolation test

1. Empty the belt and place a single input chest, one belt segment, and one output chest in a straight line.
2. Confirm every segment points the same way. A reversed piece can send items back into the source or make a loop look like a jam.
3. Leave a full tile around insertion and extraction points. Robot Arms need a reachable pickup and drop tile; walls and decorative blocks can make a working arm appear dead.
4. Feed one common item. If it arrives, the belt is healthy. Add the arm, then the filter, testing one component at a time.
5. Reconnect the main line only after the small test works. Keep a chest beside each junction so overflow has somewhere visible to land.

#Check the current drill behavior before rebuilding

Core Keeper 1.3.0.2 fixed a bug where a powered drill could deal damage on its first game tick after receiving power, which disrupted some circuit-based sorting lines. The 1.3.0.4 hotfix also fixed drills and certain other hazards not dealing damage, plus a short delay before some continuous damage sources started. If a drill line behaved differently immediately after the 1.3 update, check the live version before changing the belt layout.3

This does not mean every broken drill sorter is a patch problem. Use this split:

• If the game is older than the current hotfix, update first.
• If the drill now damages the target but items still stop, continue with the normal source-to-destination test.
• If a circuit still changes state at the wrong time, isolate the power signal and the receiving arm separately.
• If the line worked before the update and fails only when the first power pulse arrives, record the version and reproduce it in one short test lane before rebuilding.

The patch note fixes the startup damage behavior. It does not prove that a particular filter, arm, chest, or circuit layout is correct.

#Common symptoms and fixes

#Items stop at one tile

Look for a missing or reversed segment, a blocked corner, or a destination chest that is full. Temporarily remove the last belt and place a chest there. If items now arrive, the problem is downstream storage rather than transport.

#Robot Arm never picks up

Move the arm one tile closer to the belt and verify its pickup side faces the moving item. Test with an item already on the belt; an empty belt can make a correctly placed arm look inactive.

#The wrong items reach a chest

Disable the filter and run one item type through the line. If that works, the filter rule or its orientation is wrong. Use separate labeled chests for ore, food, and crafted parts before combining outputs.

#Items disappear into a loop

Break the loop at one junction and add a temporary chest. A loop is useful for buffering, but it can hide a full output chest and keep arms cycling forever. Give every loop a deliberate exit and a visible overflow chest.

#Design rule for reliable factories

Build short, named modules: input, processing, and output. Leave one tile of access beside belts and arms so you can inspect them without mining half the room. Once a module passes the one-item test, copy it; do not copy an untested junction.

#When the belt is not the problem

Sometimes the conveyor looks broken because the real bottleneck is storage, not transport.

• If the line works until the last chest fills up, the fix is destination capacity.
• If the arm moves items but the next machine does nothing, the issue is often machine setup or recipe input.
• If only one item type jams, the filter is probably wrong or too strict.
• If the whole line works in a test but fails in the base, the real issue is usually path congestion or a hidden blocked tile.

That distinction matters because many players rebuild the belt first and only discover later that the chest, machine, or room layout was the actual fault.

#A clean module layout

For a simple base, keep the flow in this order:

1. Source chest
2. One short belt lane
3. Processing station or filter
4. Output chest

If you need a longer line, split it into two short verified sections instead of one long mystery chain. A short chain can be tested and repaired in minutes; a giant loop can hide the first mistake for a long time.

#Common rebuild traps

1. Replacing every belt before testing one segment.
2. Adding arms before the belt direction is proven.
3. Mixing three item types through the same unlabelled output.
4. Using decorative room changes that block pickup tiles.
5. Forgetting that an overfull chest can make a perfect line look dead.

#Quick recovery order

When a line fails, do the same order every time:

1. Test source to chest.
2. Test source to belt.
3. Test belt to arm.
4. Test arm to destination.
5. Rebuild the full line only after each small piece works.

That order keeps the fix small and tells you which part actually needs attention.

For a broader setup, pair this checklist with the base automation baseline and record which chest owns each material.

#Failure Order

Read the symptom before rebuilding the factory:

The first successful test should move one cheap item from one source to one destination. A factory that cannot pass this test is not ready for more modules.

#Rebuild Checklist

Before rebuilding a working section, take a screenshot or write down:

• the source chest and intended destination
• the direction of each belt segment
• the pickup and drop tile for every arm
• the filter rule on each branch
• the first place where an item stops

Then rebuild only the smallest failed module. This preserves the evidence and makes it possible to compare the repaired line with the original instead of replacing a whole system without knowing what changed.

#Trace A Branch Before Adding More Speed

Branches are where a reliable line usually becomes difficult to read. Before adding a faster belt, another arm, or a second destination, choose one item type and trace the complete path:

1. mark the source chest
2. mark the first split
3. follow the item to the intended destination
4. identify where the unused branch should stop
5. test the branch with the destination partly empty

If the item reaches the wrong output, fix the split or filter before changing belt length. If the item reaches the right output but stops only when the chest fills, the transport line is working and capacity is the actual limit. If the item disappears before the split, move the test back toward the source and inspect the last handoff that worked.

This trace also gives the factory a maintenance note. Write down the source, destination, filter rule, and overflow chest beside the module. A future repair should be able to understand the line without mining every belt to discover its purpose.

#October 2026 Review Check

This review follows an item through the belt system one handoff at a time. It should help the reader distinguish a blocked input, wrong direction, missing power, full output, and pickup problem before rebuilding the whole line.

The Drill reference anchors the machine-input context; the one-line isolation order here remains editorial troubleshooting guidance.

The Drill reference anchors the machine-input context; the one-line isolation order here remains editorial troubleshooting guidance.

#FAQ

#Why is my conveyor belt not moving items?

Start with the source tile and direction. Put one cheap item on the first belt segment, then confirm it reaches the next handoff before checking arms, filters, or storage.

#Should I rebuild the whole automation line?

Only after a single segment test fails in more than one place. Most broken lines have one reversed belt, blocked output, wrong pickup tile, or full chest that makes the entire system look broken.

#When do I need the base automation guide instead?

Use the automation baseline guide when the belt itself works but the system has no clear source, destination, storage rule, or resource payoff. This page fixes a line; the baseline page decides whether the line should exist.

#Sources And Review Notes

Conveyor and arm behavior was checked against current community entries for conveyor belts and robot arms.12 The 1.3 drill notes were checked against the specific official hotfix announcement.3 The failure order is editorial troubleshooting advice based on isolating one handoff at a time.

#Related Guides

• Core Keeper Base Automation Baseline
• Core Keeper Drill Guide
• Core Keeper Storage Organization Guide
• Core Keeper Build After Update Checklist