PRECISION SCRIBING & INDUSTRIAL MARKING
CNC Diamond Drag Scribing & Single-Stroke Centerline Vector Guide
Diamond drag scribing is a non-rotary CNC marking method used widely across industrial asset tagging, aerospace identification nameplates, firearms personalization, and jewelry customization (Roland Metaza, Gravograph). A precision natural diamond or tungsten carbide cone is dragged across the metal surface under adjustable spring downforce to produce high-contrast, scratch-resistant specular marks without cutting fluids or noisy spindle rotation.
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1. Cone Angles: 90°, 120°, and 150° Selection
| Cone Angle (θ) | Penetration Depth | Line Width | Best Substrate Applications |
|---|---|---|---|
| 90° Included | Deepest ($15 - 35\,\mu\text{m}$) | Narrow ($0.03 - 0.07\,\text{mm}$) | Hardened stainless steel, tool steel, titanium |
| 120° Included | Moderate ($8 - 20\,\mu\text{m}$) | Medium ($0.06 - 0.12\,\text{mm}$) | General brass, aluminum, trophies, serial tags |
| 150° Included | Shallow ($3 - 10\,\mu\text{m}$) | Wide ($0.10 - 0.25\,\text{mm}$) | Black anodized aluminum, glossy coated metals |
2. The Single-Stroke Centerline Vector Requirement
Traditional CAD CAM routers use closed vector loops to machine pockets with spinning cutters. In diamond scribing, converting low-resolution raster graphics into double-outline contours causes the scriber to trace both the left and right border of a letter, ruining small text clarity. True single-stroke centerline (open polyline) conversion is required to ensure single, crisp passes.
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