When J.O.O.N.A.S is not sending capsules in Moon Sweepers, the cause is almost always one link in a short chain: J.O.O.N.A.S → Capsule Catcher → belt route → processing (optional) → Depot → payment. The robot only fires when its bin is full, it only fires at the nearest Capsule Catcher, and without any catcher it simply waits with a full bin until one is built. Most "it never sends anything" reports come down to a missing catcher, a catcher whose output goes nowhere, or a belt that stops short of the Depot.
Work through the chain in order, starting at the robot and ending at your money counter. The first link where dust stops moving is the one to fix.
- No catcher built: J.O.O.N.A.S waits with a full bin. Build a Capsule Catcher.
- Catcher built, nothing reaches base: check the catcher's onward route and the belt into the Depot.
- Dust reaches base, money does not change: confirm everyone is on patch 1.0.3 and restart the session.
- Unit far from every player: that is a separate known issue in 1.0.3, not a capsule problem.
How J.O.O.N.A.S Capsule Delivery Is Meant to Work
The in-game descriptions spell out the intended loop. J.O.O.N.A.S costs $20,000, scrubs the Moon one hex at a time with six arms, and always moves to the nearest hex that is still dusty. When its bin fills, it fires its dust in capsules at the nearest Capsule Catcher anywhere on the Moon. The Capsule Catcher costs $1,500; its description says it catches the capsules J.O.O.N.A.S fires and sends their dust on to the collector pad at once.
From there, the dust behaves like any other dust in your base. It still needs a working belt route to a processing machine or to the Depot before it turns into money. A catcher is a receiving point, not a seller.
| Stage | What should happen | What you should see |
|---|---|---|
| Cleaning | J.O.O.N.A.S clears the nearest dusty hex | Hexes around the unit turn clean on the Moon Map |
| Bin fills | The unit keeps cleaning until full | No capsules yet; this is normal |
| Firing | Capsules launch toward the nearest catcher | Capsules arrive at the catcher |
| Onward route | Dust leaves the collection point on belts | Capsules moving along the conveyor |
| Processing | Optional Pressure Chamber or Stone Press | Moon Sand or Moonstone on the output belt |
| Delivery | Belt reaches the Depot receiving area | Balance rises when capsules arrive |
Step 1: Confirm the Robot Has Something to Send
Before blaming the catcher, make sure the robot has actually filled up. One player who deployed a new unit noted that it fully clears a hex before moving on, that no capsule had been fired by the end of the session, and that the unit does not show a visible gauge for how much it is holding. A freshly placed J.O.O.N.A.S with no capsules yet is not necessarily broken.
- Watch the unit and confirm it is clearing hexes.
- Give it a sustained period of work before judging it.
- If it has visibly cleaned a lot of ground and still never fired, move on to the catcher checks.
If the unit is not cleaning at all, the problem is not delivery. Check whether it is far from every player first, because the developer lists J.O.O.N.A.S units stopping when players move away as an open issue in 1.0.3.
Step 2: Make Sure a Capsule Catcher Exists
This is the most common cause. The J.O.O.N.A.S description is explicit: without a catcher, it waits with a full bin until one is built. Buying the robot does not include a catcher, so the practical starting budget is $20,000 plus $1,500, before any extra conveyor.
The Packager is not a Capsule Catcher
Several players mix up the logistics buildings on their first J.O.O.N.A.S purchase. The Packager ($100) is where you unload dust you collected yourself so it can go onto a belt. It does not catch fired capsules. If your base has a Packager, a Merger and a Splitter but no Capsule Catcher, J.O.O.N.A.S has nowhere to fire.
Remember the "nearest catcher" rule
J.O.O.N.A.S fires at the nearest catcher, not the one you consider your main one. This creates a trap when you expand:
- You build a second base far away and add a catcher there.
- A unit working near that base now fires at the remote catcher.
- If that remote catcher has no route to a Depot, the dust piles up there while your main base sees nothing.
If capsules seem to vanish, check every catcher you own, not just the one at home. Either give each catcher a working route, or remove catchers you are not ready to connect.
Step 3: Follow the Dust Out of the Catcher
Catching capsules is not enough if they cannot move onward. A widely used automation checklist puts it simply: when J.O.O.N.A.S seems to come home and wait, check the Capsule Catcher and its outgoing conveyor.
- Place the catcher where its output can join an existing belt line cleanly.
- Inspect the output direction before committing to a long conveyor run.
- Start the belt at the output and follow the arrows away from the building.
- Conveyors are placed in sections of up to 30 meters at $0.50 per meter, so check the direction at every joint. One reversed section stops the whole line.
- Extend the final section into the Depot's receiving area. Capsules that reach the end of an unfinished belt can sit there without selling.
The in-game catcher description refers to sending dust to the collector pad, which also receives dust from vehicles and empties through belts from its silo. If your layout shares that collection point with vehicle unloading, a full silo with no working outgoing belt will block J.O.O.N.A.S dust as well as your vehicle loads.
Step 4: Check Processing Machines on the Route
If the belt runs through a Pressure Chamber or Stone Press, capsules can stall there even when the catcher works perfectly. Look for where capsules are piling up.
- Pressure Chamber refuses dust: its input is on the side without the handle. A belt that only looks close to the machine is not connected.
- Pressure Chamber accepts dust but makes nothing: it needs 10 kW. A Solar Post gives 3 kW and a Solar Twin (M) gives 7.5 kW, so check generation and the battery.
- Stone Press idle: it needs both dust and Moon Sand at separate inputs, plus 18 kW of power, and a clear output.
- Line stops at night: solar output can drop to zero after sunset. If stored energy runs out, processing pauses and capsules queue up until morning.
A quick way to isolate the problem is to temporarily run the catcher's belt straight to the Depot. If raw dust sells that way, the catcher is fine and the bottleneck is in your factory.
Step 5: Confirm the Depot Pays
The last link is payment. Patch 1.0.3 changed this: payment at the drop-off point now matches the amount on its screen, and dust and stone delivered by conveyor are paid for when they arrive. An earlier launch bug, in which conveyor belts could stop moon dust from being deposited, was reported as fixed by October 24, 2026.
If capsules visibly reach the Depot but your balance does not move:
- Make sure your game is updated to 1.0.3 or later.
- In co-op, make sure every crew member is on the same version, which 1.0.3 requires to play together.
- Restart the session after updating. One co-op group that was not being paid for transferred canisters reported that a restart after a small update fixed it.
- Watch one capsule arrive and check the balance immediately afterwards rather than judging over a long period.
Splitters and Mergers on a J.O.O.N.A.S Line
If you split J.O.O.N.A.S dust across several machines, the junctions are another place for capsules to stop. Patch 1.0.3 included fixes for conveyors, mergers, splitters and production, and lets splitters and mergers snap together port to port. The developers still list automation reliability as an ongoing issue.
- Check each splitter's output direction after rotating it.
- Make sure both merger inputs feed the same outgoing belt rather than sitting next to it.
- When a junction misbehaves, bypass it with a straight belt to test whether the rest of the line works.
Troubleshooting Table
| Symptom | Most likely link | What to do |
|---|---|---|
| Unit cleans but never fires | Bin not full yet, or no catcher | Wait longer; build a Capsule Catcher if none exists |
| Unit idle and not cleaning | Distance issue or other fault | Stay near it and recheck; this is not a capsule fault |
| Capsules land at a remote catcher | Nearest-catcher rule | Connect that catcher or remove it |
| Capsules stuck at the catcher | No onward belt | Build a belt from the output toward the Depot |
| Capsules pile up at a belt end | Belt stops short | Extend it into the Depot receiving area |
| Queue at a Pressure Chamber | Wrong input side or no power | Feed the side without the handle; check 10 kW |
| Queue at a Stone Press | Missing ingredient or power | Supply dust and sand separately; check 18 kW |
| Delivery works, no money | Version or session state | Update to 1.0.3 for everyone and restart |
Before Buying Another J.O.O.N.A.S
A second unit adds nothing if the first one's capsules are not being turned into money. Fix the chain, let one full batch from the first robot reach the Depot and pay out, and only then spend another $20,000. Every extra unit you add sends more dust down the same route, so a weak link that barely copes with one robot will fail outright with several.