- screw drivers chains connect inline gears and transfer rotation through a mechanical build.
- Placement method requires selecting the chain, choosing two gears, then adding more aligned gears.
- Best fix is to select another part after the final connection so chain placement ends correctly.
- Stability check includes testing stationary gears, confirming axle connections, and leaving the editor before driving.
screw drivers chains Basics
In screw drivers chains, the chain is a connection tool for transferring motion between compatible gears. The placement process is different from ordinary beams, axles, and gear parts because the chain remains active after the first connection. Understanding that behavior prevents most failed placements and makes compact mechanical builds easier to organize.
The essential rule is alignment. Select a chain from the build menu or hotbar, click the first gear, and then click a second gear that is positioned inline with the first. Once the connection appears, you can continue selecting additional gears without switching back to the chain item. To finish the chain process, select another part or tool.
| Chain Action | Required Input | Expected Result |
|---|---|---|
| Start placement | Select the chain tool | Chain placement mode becomes active |
| First connection | Click a gear | First gear becomes the starting point |
| Second connection | Click an inline gear | Chain appears between the two gears |
| Add another gear | Continue clicking compatible gears | The chain extends through the assembly |
| End placement | Select a different part | Chain mode stops accepting new gears |
Inline Alignment
Keep connected gears on the same usable line. Misaligned gears may prevent the chain from orienting correctly.
Continuous Mode
After the first link, the chain tool can continue targeting additional gears.
Tool Switching
Select another build part to end chain placement cleanly.
Motion Testing
Test the assembly after placement instead of judging the connection only by its preview.
If the chain appears to select but does not immediately render, click the first gear and then the second gear deliberately. A visible preview is not always shown before both targets are chosen.
Step-by-Step Chain Setup
Use this workflow whenever you need to connect two or more gears. It works best when the gears are already installed, supported by axles, and positioned before you activate the chain tool. Preparing the mechanical layout first reduces accidental selections and makes troubleshooting easier.
Prepare the Gear Line
Place the gears, axles, and holders before selecting the chain. Check that the target gears are aligned and that no moving component is obstructing the connection point.
Select the Chain Tool
Choose the chain from the menu or hotbar. Avoid switching to another part between the first and second gear clicks, or the connection sequence may be interrupted.
Choose Two Gears
Click the starting gear, then click the second inline gear. The chain should appear between those targets once the game accepts both selections.
Extend or Finish
Continue clicking other compatible gears if you want one chain to link several points. When finished, select a different part to exit chain placement mode.
| Step | Build Focus | Common Mistake | Better Practice |
|---|---|---|---|
| 1 | Gear preparation | Adding a chain before checking alignment | Set the gear line first |
| 2 | Tool selection | Switching parts after one gear click | Keep the chain tool active |
| 3 | Target selection | Clicking a non-inline gear | Use the first and second aligned gears |
| 4 | Completion | Leaving chain mode active | Select another part after the last link |
A chain can appear to remain selected even after the first connection. This is intentional behavior for multi-gear layouts, but it can feel like the tool is malfunctioning if you expect a single placement action. Treat the chain as a continuing connection mode until you deliberately select another component.
The most consistent sequence is: prepare the gears, select chain, click gear one, click gear two, add extra gears if needed, then select another part.
Troubleshooting Chains That Will Not Place
When chains do not place, check the interaction sequence before rebuilding the entire vehicle. A chain may be selected even when the interface does not provide an obvious confirmation. In many cases, the connection appears only after the second gear is targeted.
The community troubleshooting discussion on Chains not placing in Screw Drivers highlights several practical checks: click the first and second gears, continue clicking aligned gears for multi-link chains, and switch to a different part to end the placement process.
| Symptom | Likely Cause | Recommended Fix |
|---|---|---|
| Chain tool appears inactive | First gear has not been selected | Select the chain, then click the starting gear |
| No chain appears | Second target is invalid or misaligned | Click a compatible inline gear |
| Chain keeps accepting targets | Chain mode is still active | Select another part or tool |
| Chain preview is incorrect | Gear orientation or alignment is unsuitable | Reposition the gear before linking |
| Chain disappears during testing | Build state did not update correctly | Leave the editor, then test the vehicle again |
| Connection fails around a motor | A connected axle is moving during placement | Temporarily remove the motor-linked axle |
If a chain looks connected but is not animated during a motor test, first confirm that the gears themselves are supported and connected to the drivetrain. Then leave the building editor and test the vehicle from the normal driving view. Some builds may not finalize the chain state until the editor is closed.
A practical recovery method is to remove an axle connected to the engine, place the chain while the target gear is stationary, and then restore the axle. This approach can help when a moving gear prevents the chain from being added correctly.
Do not assume a missing animation always means the chain is broken. Verify gear alignment, axle support, placement completion, and behavior outside the building editor first.
Chain Layouts and Mechanical Design Tips
Chains are most useful when a build needs flexible power routing without placing every gear directly beside the motor. A clean layout keeps the drivetrain easier to inspect and gives you more room to adjust gear spacing, axle positions, and structural supports.
Use short, direct connections for compact builds. For larger assemblies, connect several inline gears only when each intermediate gear contributes to the intended power path. Extra links can make the system harder to diagnose, especially if one gear is misaligned or unsupported.
Compact Drive
Use a short chain between nearby gears. This layout is easy to inspect and suits small vehicle frames.
Extended Drive
Link multiple inline gears when the drivetrain needs to cross a longer section of the chassis.
Service Layout
Leave access around gear holders and axles so individual parts can be removed without rebuilding the full assembly.
| Layout | Strength | Risk | Best Use |
|---|---|---|---|
| Short two-gear link | Simple and easy to verify | Limited routing flexibility | Compact drivetrains |
| Multi-gear line | Extends one connection across several gears | One bad target can disrupt the chain | Longer mechanical assemblies |
| Stationary setup | Easier placement and inspection | Requires temporary preparation | Troubleshooting difficult links |
| Editor-tested layout | Fast iteration during construction | Preview may not show final behavior | Early design checks |
| Drive-tested layout | Confirms actual motion transfer | Takes longer to revise | Final validation |
Before testing, inspect the following areas:
- Gear alignment: Confirm each linked gear is positioned in a usable line.
- Axle support: Make sure the gears are attached to appropriate axles or holders.
- Motor connection: Verify the motor is connected to the intended drivetrain path.
- Chain completion: Select another part after placing the final connection.
- Editor state: Leave the building interface before judging animation or disappearance issues.
Build the simplest working chain first. Add extra gears only after the two-gear connection transfers motion correctly in a normal test drive.
Final Verification Checklist
A working chain should be checked in both the construction interface and the vehicle test. Visual placement is useful, but mechanical behavior is the final measure. Run through this checklist before adding bodywork or committing to a more complex drivetrain.
Chain Validation:
- Select the chain tool before targeting any gears
- Connect a first gear to a second inline gear
- Switch to another part after the final chain link
- Confirm the linked gears have axle and motor support
- Exit the building editor and test the vehicle
| Verification Point | Pass Condition | If It Fails |
|---|---|---|
| Tool state | Chain tool accepts the first gear | Reselect the chain from the hotbar |
| Gear targets | Two inline gears connect visibly | Reposition one or both gears |
| Multi-link behavior | Additional gears connect as intended | End placement and restart with fewer links |
| Mechanical support | Gears remain attached to axles or holders | Replace or reconnect the support parts |
| Test drive | Chain remains present and transfers motion | Rebuild while the drivetrain is stationary |
For advanced builds, validate one connection at a time. Place the first chain, test the drivetrain, and then add the next link. This staged method makes it easier to identify whether the issue comes from gear alignment, a moving axle, or an incomplete placement state.
Save complex testing for the end of a small build cycle. Frequent short tests are usually easier to diagnose than one large drivetrain with several uncertain connections.
FAQ
Q: How do I place screw drivers chains between two gears?
Select the chain tool, click the first gear, and then click a second gear that is inline with it. The chain should appear after both targets are selected.
Q: Why does the chain keep trying to connect to more gears?
Chain placement remains active for multi-gear connections. Select a different part or tool after the final link to end the process.
Q: What should I do if the chain disappears during a test drive?
Check that the gears are aligned and supported, finish chain placement by selecting another part, then leave the building editor before testing again. If a motor-linked axle is moving during placement, temporarily remove it and restore it afterward.
Q: Can I connect several gears with one chain?
Yes. After the first two gears are linked, continue clicking other compatible inline gears. Use this approach carefully because an incorrectly aligned intermediate gear can make the full route harder to troubleshoot.
Successful chains depend on three habits: align the gears, complete the placement mode, and verify the drivetrain outside the editor.