How to Fix a Kinetic Slag Press That Keeps Jamming

What is actually going wrong

Burnt slag has to fall onto the press to be processed. It passes through in a very short window, and — as players in the Steam discussions worked out — anything that lands on top of a piece during that window does not count as hitting the press. That second piece now sits there as a solid particle. The next piece lands on it, from a shorter drop, and also fails. Within a minute you have a pile that resets the fall height for everything above it, and the line is dead.

On top of that, the developer has confirmed a genuine bug: the press “sometimes just… doesn’t work”, and the missed piece then cascades into exactly the pile described above.

So the goal is not to feed the press faster. It is to guarantee that only one piece of burnt slag arrives at a time, and that anything the press misses gets out of the way.

Fix 1 — Put a filter above the press (do this one first)

This is the fix that comes up most often, and it solves two problems at once.

Place a filter in the feed line above the press and set it to allow only burnt slag. That does two things:

• It meters the flow. A filter passes material more slowly than a raw belt or launcher dump, which naturally spaces the pieces out.
• It keeps spores, gold, sand and anything else out of the press area. Those materials do not get processed, so every one of them that reaches the press is a future blockage.

If you only make one change, make it this one.

Fix 2 — Leave the space below the press empty

The press needs somewhere to put its output. Players recommend keeping at least five empty blocks below the press, and checking that material below never builds up to the height of the press itself. Once the pile below reaches the press, the press has no clearance and stops behaving predictably.

Fix 3 — Make the press one tile wide

If the press is one tile wide, anything that misses simply falls off the side instead of resting on top. Slag that falls past can be collected and re-fed.

Fix 4 — Add a launcher to clear misses

Two placements are used:

• A launcher at the bottom, to fire accumulated material out of the collection area before it stacks up to the press.
• A launcher pointing up, directly over the press, to knock a stuck piece back into a proper fall.

Fix 5 — Limit the height of material on the incoming belt

Players cap the material height on the conveyor feeding the press — two blocks is the figure that gets cited — so the belt physically cannot deliver a thick slug of slag all at once.

Fix 6 — Space multiple presses apart

If you are running several presses, put gaps or walls between them so overflow from one does not land on its neighbour. A staircase-shaped wall above the presses is used to spread incoming particles across them instead of dumping the whole stream onto the first one.

Bonus: draining water out of the press area

If water is getting into the press pit, players point a filter away from the press and set it to a material that will never realistically arrive — snow is the example given. Water passes out through it; your burnt slag does not.

Checklist

1. Filter above the press, set to burnt slag only.
2. Five or more empty blocks below the press.
3. Press one tile wide so misses fall clear.
4. Launcher below (and optionally above) to clear pile-ups.
5. Belt material height capped at about two blocks.
6. Gaps or a staircase wall between multiple presses.