Optimizing Your Sandustry Factory

A factory that works is not the same as a factory that works efficiently. Optimization is the practice of finding what limits your throughput — the shaker that starves because sand cannot reach it, the belt that clogs because slag piles faster than it burns, the press that idles because your lava pit ran dry — and fixing it systematically. This guide covers the diagnostic mindset and the specific fixes.

The optimization mindset

Do not optimize what you have not yet identified as a bottleneck. The most common mistake is adding more shakers while the real constraint is water supply. Always:

1. Identify the bottleneck — what is the one thing that, if fixed, would increase gold per minute?
2. Fix only the bottleneck — adding capacity elsewhere is wasted effort until the current limit is resolved
3. Verify the fix — measure gold per minute before and after to confirm improvement

Use the Production Ratio Helper to model belt speeds, shaker counts, and water throughput before building.

Is This the Best New Simulation Game? Sandustry factory optimization

Common bottlenecks and fixes

Bottleneck: Sand mining rate

Signal: Sand belt runs empty; shakers starve.

Fix:

• Add a parallel sand mining face
• Upgrade from manual dig to Digger drones
• Extend the sand pile closer to the dig face to reduce travel time

Bottleneck: Water supply

Signal: Mixer outputs dry sand; Wet Sand production drops.

Fix:

• Run a dedicated water pipe to the mixer — not a shared lake pipe
• Add a header tank above the mixer for pressure
• For renewable water: burn Snow or Firn; collect steam rain into a cistern

Bottleneck: Shaker throughput

Signal: Sand and water flow fine but gold per minute is lower than expected.

Fix:

• Verify shakers are diagonal — flat shakers lose gold to clogging
• Check for correct slope so gold falls through while slag continues
• Add a second shaker in series so material gets a second roll

Bottleneck: Slag evacuation

Signal: Slag backs up onto shaker grates; shakers jam.

Fix:

• Slag belt must have a clear evacuation path — no dead ends
• Add a separate slag belt from each shaker row
• Route slag to burn lane before adding more shakers

Bottleneck: Burn lane capacity

Signal: Burnt Slag backs up; press idles.

Fix:

• Lava pit burns slag automatically; flamethrower lanes need player time
• Scale burn lanes proportionally to slag generation — one lava pit per three to four shakers is a common benchmark
• Keep a Cinder buffer above each burn lane so it does not run dry

Bottleneck: Press throughput

Signal: Burnt Slag accumulates; press is the limiting step.

Fix:

• One Kinetic Slag Press handles roughly two to three burn lanes worth of slag
• Add a second press if your burn lanes produce more than one press can process
• Route press output to the same gold collector as your shakers

Ratio balancing

Sandustry factories run on ratios. The key ones:

Ratio	Target	What happens if wrong
Sand : Water	1 : 1	Too dry = no Wet Sand; too wet = slurry that clogs
Wet Sand : Shaker	1 shaker per ~3 sand/min	More shakers than sand = idle shakers
Shaker : Slag evacuation	1 belt	Slag piles on grates if evacuation is slow
Slag : Burn capacity	1 lava pit per 3–4 shakers	Burn lane overwhelmed if too many shakers
Burnt Slag : Press	1 press per 2–3 burn lanes	Press idles if starved; backed up if overfed

The Production Ratio Helper calculates these for your specific factory size.

Belt speed and layout

Belt speed is fixed in Sandustry. Layout decisions that affect throughput:

• Short belts beat long loops — less jam surface, faster material travel
• One material per main trunk until Filters unlock — mixed belts require sorting before they reach shakers
• Parallel lanes scale linearly — two sand belts from two dig faces double sand input if each is independently fed
• Launcher stair efficiency — test each launcher tier with a known sand volume before connecting the chain

Scaling from starter pit to megabase

Stage 1: Manual starter (0–30 minutes)

• Two diagonal shakers, one collector, manual sand + water
• Goal: prove the loop; learn shaker angle and gold proc rate

Stage 2: First automation (30–60 minutes)

• Add Logistics 1: conveyors and one launcher
• Route sand belt → mixer → Wet Sand belt → shakers
• Add a flamethrower slag burner
• Goal: shakers run without constant feeding

Stage 3: Slag press (1–3 hours)

• Unlock Refining 2: Kinetic Slag Press
• Route all slag to a lava burn lane or upgrade flamethrower to lava pit
• Add Spore collection for flower line
• Goal: second gold stream from press

Stage 4: Fluxite start (3–6 hours)

• Unlock Flux Emanator: Amethelis + RedSand → Voidbloom → Fluxite
• Build first planter boxes
• Spend first Fluxite on scanner, capacity, hover
• Goal: hands-off Fluxite income

Stage 5: Deep factory (6+ hours)

• Dig vertical shaft to lava layer
• Build Scoria → Cinder → lava pit logistics
• Stack factory floors: sand/mixers → shakers → burn/press → flowers
• Scale each floor with parallel lanes
• Goal: gold per minute that funds research faster than you spend it

Signs your factory is well-optimized

• Gold income per minute is steady and predictable — not spiky
• Shakers run continuously without manual refilling
• Slag does not accumulate on grates between sessions
• Press has a steady input of Burnt Slag
• Fluxite grows without you touching the Emanator
• You can leave the factory for 30 minutes and return to more gold, not a jam

Related guides

• Production Ratio Helper — balance dig rate, water, shakers, and burn
• Starter Factory Layout — proven early factory shapes
• Factory Blueprints — detailed layout diagrams
• Lava-Powered Factory — self-running heat for slag and flowers