Mechanical Crafters need rotational force to operate
A Mechanical Crafter in Create Mod will not craft anything without rotational power — the mod's term for spinning energy that flows through shafts and gears. The crafter itself is a block that holds a recipe and waits for items to arrive in its input slots, but it only executes that recipe when it receives continuous rotation from an adjacent power source.
The rotation must come from a shaft, cogwheel, or other rotating component connected directly to the crafter's side. The crafter does not care how fast the rotation spins — it works at any speed from 1 RPM upward — but it must be spinning. If the shaft is stationary, the crafter sits idle.
Key Takeaways
- A Mechanical Crafter requires a rotating shaft or cogwheel touching one of its sides to power its crafting cycle.
- The rotation can come from a water wheel, windmill, furnace engine, or any other Create Mod power source connected through shafts and gears.
- Rotation speed does not matter — 1 RPM works the same as 256 RPM — but the shaft must be actively spinning.
- If items are in the crafter's input slots but nothing is happening, check that the connected shaft is rotating and that the recipe is valid.
Common power sources and how to connect them
The easiest early-game power source is a water wheel. Place it in flowing water (a stream or a channel you create), and it begins rotating automatically. Run a shaft from the water wheel to the Mechanical Crafter by placing shaft blocks in a line between them. The shaft will inherit the rotation from the wheel and pass it to the crafter.
A windmill works similarly but requires sails and catches wind in open air. A furnace engine burns fuel (coal, charcoal, or wood) and produces rotation — this is useful when water or wind are not available. Later, a steam engine can power large operations, and a flywheel can store rotation for use when your primary source is not running.
All of these connect the same way: run a shaft from the power source toward the crafter, and place the crafter so that one of its four sides touches the rotating shaft. The crafter will draw power from that contact point.
Shafts, gears, and direction
Shafts transfer rotation in a straight line. If your water wheel is to the north and your crafter is to the south, place shaft blocks in a line between them. Each shaft block passes rotation to the next one in the chain.
Cogwheels change the direction of rotation and can also change the speed. A large cogwheel meshed with a small cogwheel will spin faster or slower depending on which is which. For a Mechanical Crafter, you usually want the rotation to arrive from the side, so if your shaft is running east-west but the crafter's input face points north, use a cogwheel to redirect the rotation 90 degrees.
Place the cogwheel so that its teeth touch the shaft, and the rotation will transfer. Then run another shaft from the cogwheel to the crafter's side. The crafter does not care about speed, so you can use any gear ratio.
Checking that the crafter is receiving power
Hold a wrench (or use the mod's rotation indicator) and look at the shaft connected to your crafter. If the shaft is spinning, you will see it rotate visually. If it is stationary, the power source is not connected properly or is not running.
Common problems: the water wheel is placed in still water instead of flowing water; the furnace engine has no fuel; the shaft has a gap in the line and is not actually touching the crafter; or the crafter is facing the wrong direction and its input side is not touching the shaft at all.
Rotate the crafter with a wrench if needed so that one of its sides faces the incoming shaft. The crafter will accept power from any of its four sides.
Recipe validation and input flow
A Mechanical Crafter will only craft if three conditions are met: it has power, it has all the items the recipe requires in its input slots, and the recipe is valid. If the crafter has power and items but is not crafting, the recipe may be wrong or the items may not be in the correct slots.
Right-click the crafter to open its interface. You will see the recipe grid and the input slots. Place items into the input slots that match the recipe pattern. The crafter will then begin crafting on the next rotation cycle.
Items can flow into the crafter from adjacent item conduits, chutes, or belts, which is useful for automation. But the crafter itself does not pull items — they must be pushed in or placed manually.
Speed and efficiency considerations
Rotation speed affects how fast the crafter cycles through recipes, not whether it works. A crafter spinning at 1 RPM will craft one item per rotation cycle, just very slowly. A crafter at 256 RPM will craft the same item much faster.
For early builds, a water wheel or windmill provides enough speed. For large-scale production, you may want to increase speed by using a small cogwheel on your power source meshed with a large cogwheel on the crafter's shaft — this multiplies the rotation speed. Use a speed controller if you need to slow down a fast power source to avoid overwhelming your input system.
Troubleshooting a non-working crafter
If your Mechanical Crafter is not crafting, work through this checklist in order. First, verify the shaft is rotating by looking at it with a wrench. Second, check that the crafter's input side is touching the shaft — rotate the crafter if needed. Third, open the crafter's interface and confirm the recipe is set and the input slots hold the correct items.
If the shaft is not rotating, trace the power source: is the water wheel in flowing water, does the furnace engine have fuel, is the shaft line unbroken with no gaps? If items are not in the input slots, check that you placed them correctly or that your item conduits are connected to the right side of the crafter.
Once power is flowing and items are in place, the crafter will begin its cycle. Watch for the crafting animation — the crafter's arm will move when it is working.
Frequently Asked Questions
Does the rotation speed matter for a Mechanical Crafter?
No. The crafter works at any speed from 1 RPM to 256 RPM. Speed only affects how fast it completes recipes, not whether it works at all. A slow crafter will still craft; it will just take longer between cycles.
Can I power a Mechanical Crafter with a hand crank?
Yes, but only for testing or very small operations. A hand crank provides rotation when you right-click it, but you must keep clicking to maintain power. For any real production, use a water wheel, windmill, furnace engine, or other continuous power source.
What happens if I connect multiple power sources to one crafter?
The crafter will accept power from any side that has a rotating shaft. If two shafts are connected to different sides of the same crafter, they must be rotating in the same direction and at compatible speeds, or the shafts will jam and stop.
Can I use a belt instead of a shaft to power the crafter?
No. A Mechanical Crafter requires a shaft, cogwheel, or other solid rotating block touching its side. A conveyor belt can deliver items to the crafter's input, but it cannot provide the rotational power the crafter needs to operate.
Why is my crafter spinning but not crafting?
The shaft is rotating but the crafter is not executing the recipe. Check that the input slots contain the exact items the recipe requires, in the correct pattern. Also verify that the recipe itself is valid — some recipes may not work in a Mechanical Crafter if they require special conditions.