- Auto farming uses soil, water, and mechanics to harvest crops automatically.
- Vacuum systems transport harvested crops to Packing Stations or chests.
- Scrap Mechanic raids scale with crop value, so defense is critical.
- UV Grow Beds in the 1.0 update allow underground and vehicle farming.
- Controllers and timers manage water cannons and harvester movement.
Essential Components for Auto Farms
Building a reliable auto farm in Scrap Mechanic requires specific parts to handle planting, watering, harvesting, and transport. A basic automated system consists of a water supply, a distribution method, and a collection mechanism. Without these three pillars, you still have to manually water or gather items.
| Component | Function | Required Parts |
|---|---|---|
| Water Source | Stores water for irrigation | Water Container |
| Distribution | Waters crops automatically | Water Cannon, Bearings, Controller |
| Collection | Gathers harvested crops | Vacuum Pump, Vacuum Pipes |
| Logic | Automates timing and movement | Logic Gates, Timer, Sensors |
Automated farms plant more crops faster, which increases your total crop value. Higher crop values trigger stronger and more frequent raids. Always build defensive walls and turrets before expanding your production lines.
Layout and Crop Selection
The physical layout of your farm determines how easily you can automate it. Long, straight rows are best for movers and water cannons. Keep the layout flat and ensure there is enough clearance for harvester sawblades or vacuum pipes to pass without getting stuck.
| Crop Type | Crop Value | Best Use | Growth Rate |
|---|---|---|---|
| Carrot | 1 | Early food, trading | Fast |
| Potato | 1.5 | Spudgun ammo | Medium |
| Cotton | 1.5 | Seats, Glue, crafting | Medium |
| Pineapple | 3 | High-value trading | Slow |
| Broccoli | 3 | Late-game food | Slow |
Separate your low-value crops from high-value crops. If a raid destroys part of your farm, you will still have a steady supply of basic food and materials from the unaffected sections.
Row Farm
- Linear rows
- Easy to water
- Simple harvester path
- Best for beginners
Grid Platform
- Dense planting
- Maximizes space
- Complex logic needed
- Advanced design
Vertical Tower
- Multi-level
- Saves ground space
- Requires lifts
- UV Grow Bed usage
Building the Automated Harvester
Creating a machine that physically cuts down crops is the most efficient way to harvest. This typically involves a vehicle or a moving carriage equipped with Sawblades that rides along a rail or track over the crops.
Construct the Frame
Build a rectangular frame using metal beams. The width should match your crop rows exactly. Add wheels or bearings on the sides so the machine can slide along a fixed track or rail.
Install Cutting Tools
Mount Sawblades on powered bearings at the bottom of the frame. Position them low enough to cut crop stems but high enough to avoid hitting the soil bags or the ground.
Add Collection System
Place Vacuum Pumps on the frame and connect Vacuum Pipes leading to a Resource Chest or a container. Ensure the pipe inlets are positioned directly under the Sawblades to catch dropped items.
Program Movement
Use a Controller to program the bearings. Set the machine to move slowly forward to cut, then reverse or return to the start position. Adjust speed to ensure all crops are harvested.
The 1.0 Drilling Thunder update introduces UV Grow Beds. These allow you to plant crops underground or on moving vehicles. This means you can build a harvester that drives over its own crops, combining the vehicle and farm into one mobile unit.
Automated Irrigation Systems
Keeping soil hydrated is the most time-consuming part of farming. Automating this with Water Cannons and a Controller ensures your crops never wither, even while you are exploring or mining.
| Irrigation Type | Complexity | Efficiency | Water Usage |
|---|---|---|---|
| Manual Bucket | Low | Low | Manual |
| Stationary Cannon | Medium | Medium | High |
| Moving Sprinkler | High | Very High | Optimized |
To build a moving sprinkler, place a Water Cannon on a rotating bearing connected to a Controller. The bearing should sweep across the crop rows. Connect the Water Cannon trigger to a Button or Logic Gate that activates when the cannon is facing the crops.
Connect your Water Cannons to a large Water Container via pipes. Ensure the container is regularly filled by a Vacuum Pump placed in a lake or pond. This creates a closed loop that never requires manual bucket refilling.
Logic and Timing Optimization
Using Logic Gates and Timers allows you to sync your watering and harvesting cycles. You can set a system to water every morning, wait for crops to grow, and then trigger the harvester only when ready.
Recommended Logic Setup:
- Timer: Set to trigger every few in-game days.
- Sensor: Detects when crops are fully grown (if using specific mods) or simply acts as a master switch.
- Logic Gate: Connects the Timer to the Water Cannon and the Harvester Controller separately.
| Logic Component | Role in Auto Farm |
|---|---|
| Timer | Triggers watering cycles at set intervals |
| Button | Manual override to start harvesting |
| OR Gate | Combines manual and automatic signals |
| NOT Gate | Inverts signal for safety shutoffs |
Complex logic with too many sensors and gates can cause lag in large worlds. Keep your logic chains as simple as possible. Use a single master Timer to control multiple systems rather than individual timers for every section.
Base Defense for Auto Farms
Large auto farms are high-value targets for Farmbots and Tapebots. Protect your investment with concentric walls, elevated firing platforms, and automated defenses.
Farm Defense Essentials:
- Build a perimeter wall at least two blocks high
- Create narrow chokepoints to funnel enemies
- Install Spudgun turrets at corners
- Keep a repair bench inside the walls
- Store extra ammunition in a protected chest
| Defense Structure | Effectiveness | Cost |
|---|---|---|
| Wooden Wall | Low vs Raid bots | Low |
| Stone Wall | Medium vs Farmbots | Medium |
| Metal Fence | High vs Small bots | High |
| Turret Tower | Very High | Very High |
Remember that raids in Version 1.0 start immediately after being triggered and feature smarter pathfinding. Bots will attempt to find weaknesses in your walls rather than attacking the nearest point. Ensure your defenses have overlapping fields of fire.
FAQ
Q: Can I build an auto farm without mods?
Yes, Scrap Mechanic supports fully automated farms using vanilla parts like Bearings, Controllers, Water Cannons, and Vacuum Pumps. Mods can add new sensors or easier parts, but they are not required.
Q: Do auto farms trigger more raids?
Yes. Every crop planted adds to your farm's total crop value. Auto farms allow you to plant more crops faster, which increases the raid intensity. Always expand defenses alongside production.
Q: What is the best crop for auto farming?
Carrots are the best starting crop due to their low value and fast growth. For late-game auto farms, Pineapples and Broccoli offer high trade value but require strong defenses against harder raids.
Q: How do UV Grow Beds work?
Introduced in the 1.0 Drilling Thunder update, UV Grow Beds use electricity to grow crops underground or on vehicles. They do not require natural sunlight or water buckets, making them perfect for subterranean or mobile auto farms.