SVG Cuts the Same Edge Twice: Check for Duplicate Lines
If an SVG retraces one edge, look for stacked duplicate paths before changing speed or power. Separate overlapping objects, delete only confirmed duplicates in a copy, then preview and test the cleaned edge at final size.
The August 2026 file-repair discussion explicitly reports duplicate overlapping lines that make a cutter retrace an edge and recommends a tiny proof. See the duplicate-line report.
A near-duplicate is more dangerous than an exact stack because it can leave a widened kerf instead of an obvious second traversal. Inspect both object count and coordinate offset before deleting geometry.
Reveal the stacked objects
1. Duplicate the file and lock the untouched source.
2. Select by layer and inspect object count around the hot edge.
3. Move one suspected path temporarily to reveal a stack.
4. Restore or delete based on the intended design.
5. Use a tiny square or representative corner as the physical proof.
Observe the suspected double edge through one tiny proof and stop before a second traversal damages the sample.
| Workflow stage | Measured evidence | Boundary |
|---|---|---|
| Single edge | One intended path | One preview traversal |
| Exact stack | Two paths share coordinates | Remove confirmed duplicate |
| Near duplicate | Small offset creates double kerf | Review design intent |
| Repeated object | Array contains legitimate copies | Do not flatten blindly |
Retain the stacked-path screenshot and cleaned traversal preview. Do not average single edge and exact stack. Their evidence—one intended path versus two paths share coordinates—answers different questions and leads to different release choices.
SVG retrace questions
Why is one cut edge darker than the others?
A duplicate line may make the laser retrace it, but focus, material and motion can also change appearance.
Does the preview show duplicate paths?
Often it can, but inspect object count and traversal rather than relying on color alone.
Can duplicate removal damage an array?
Yes. Work on a copy and confirm that repeated parts remain complete.
What the machine cannot fix
This is an SVG cleanup workflow for a large X1S 2026 job; it does not publish settings or guarantee all software detects duplicates the same way. The live TYVOK X1S 2026 listing supplies the current configuration boundary. Keep the duplicate-line proof on a known material so file evidence remains visible.
If the edge fails to meet rather than retraces, use DXF Cutline Has Tiny Gaps: Find Open Paths Before a Large Cut. Clean geometry can then enter the mixed-operation order in Large Sign Has Photo and Cutline: Set the Process Order First.
Approve the cleaned SVG only when the edge traverses once.