Checking Board Profiles and Internal Cutouts in Fabrication Data

A dimensioned PDF can describe a board beautifully while leaving the CAM operator without an unambiguous digital profile. Provide machine-readable geometry and use the drawing to explain dimensions, tolerances, and special requirements. Then check that the two descriptions agree.

Separate digital geometry from documentation

Ucamco’s fabrication-data guide explicitly distinguishes a profile drawing from the digital profile data needed by manufacturing. The drawing supports interpretation and verification; it does not establish the profile’s exact registration with the copper by itself. Ucamco: profiles and fabrication data.

Identify the authoritative profile layer or file in the delivery manifest. Confirm that it contains the intended outer boundary and internal cutouts without unrelated dimensions, page borders, or construction sketches. Avoid delivering several slightly different outlines and expecting the supplier to choose the newest one.

Inspect geometric completeness

• Check that intended contours are closed and connected.
• Look for duplicate segments, small gaps, and self-intersections.
• Distinguish routed cutouts from slots defined in drill or route data.
• Review internal corner radii against the mating part and machining process.
• Confirm which line or contour represents the finished board edge.

For example, a rectangular internal opening may be drawn with sharp corners even though it will be routed with a round tool. If a mating part requires clearance at the corners, resolve the actual geometry with the mechanical designer and fabricator before release.

Compare against copper and holes

Load the profile, copper, and drilling together. Measure known mounting-hole positions and check edge clearances at several locations. Include asymmetric features so an accidental mirror or rotation becomes obvious. Verify the board’s overall dimensions in the same unit system as the drawing.

If a mechanical revision moves a cutout, check the nearby copper, mask, components, and support features rather than updating only the profile file. A mechanically correct opening can still remove a trace or leave insufficient edge clearance.

Make special edge requirements explicit

Identify bevels, plated edges, scoring, tabs, or other operations in the appropriate supporting drawing and data. Do not rely on a visual resemblance to a common connector shape to communicate them. Ask the fabricator to confirm any nonstandard interpretation.

Retain the inspected output and export settings with the board revision. The final package should let the supplier locate every finished edge relative to the circuit without manual reconstruction. That reduces both quotation questions and the risk of receiving boards that are electrically correct but mechanically incompatible.

Check the narrowest internal opening against the agreed routing process before assuming that every drawn corner can be produced.