PCB Design for Hothouse Project
Thought for 21 sec
In Flux, you need to remove the old locked route traces from the PCB layout so the router can start clean.
Do this:
- Open the PCB/Layout view.
- Find the routed copper traces — not the components.
- Select old route segments/traces.
- If they are locked/protected, look for a property like Locked, Protected, or Important Override and turn it off.
- Delete the old traces.
- Repeat until the old routed copper is gone.
- Leave the components, pads, and board outline alone.
- Then ask me to rerun routing.
What you want is effectively:
delete old traces only, not schematic connections and not components.
delete old traces only, not schematic connections and not components.
The schematic/netlist stays intact, so after the traces are deleted, the board will show airwires again — that is expected. Then I can reroute cleanly on the larger 110 × 50 mm / 4-layer board.
Thought for 5 sec
You usually don’t need to know “old” by age. In this case, “old traces” means any routed copper trace that is currently causing errors after we resized/replaced the board.
Easiest way to identify them:
- Open the Review / Issues panel.
- Look for these issue types:
- Dangling Traces
- Floating Copper
- Overlapping Copper
- Airwires
- Click one issue, for example
Trace 147borTrace 321b. - Flux should highlight that trace on the PCB.
- That highlighted trace is one of the problem traces to unlock/delete.
- Repeat for each listed trace issue.
Do not delete:
- component footprints
- pads
- board outline
- schematic parts
- net labels
Do delete/unlock:
- highlighted copper routes/traces/vias associated with those review errors.
A shortcut: if there’s an option like delete all routing, rip up traces, or clear routed copper, use that. That is safer than trying to identify individual old traces one by one, because the schematic connections remain intact and the board will simply show airwires again for rerouting.
List trace issues
Rip-up guidance
Check USB2_D_P
Highlight DRC issues
