Architectural Flashing Supply
Start a Quote
DXF validation and manufacturing readiness · Lesson 4 of 4

DXF validation and manufacturing readiness: defects, verification and case study

The five faults that stop a section becoming a profile, the sender’s CAD tools that fix them, splines and typed dimension text, the 36 in parapet case, paper space and blocks, files AFS cannot read, revisions, and checking the formed piece.

You will be able to: Diagnose common DXF defects (wrong unit, gaps and duplicate lines, splines at bends, overridden dimension text, dimensions or notes tied to the wrong element, paper-space content, unreadable files), choose a correction and document the evidence.

11 min · 12 slides · 8 questions

All lessons in this module
Slide 1 of 12

Defect catalogue

Five faults stop a section becoming a correct profile: a gap between lines at a bend, a duplicate line, a spline where a bend should be, a dimension measuring the wrong element, and no stated unit.

Each one changes a leg, an angle or the scale, and each can look fine at a glance on screen.

The same drip edge section, ready to read and not readyTwo panels of one drip edge section. Left, Ready: one continuous red line with legs A, B, C and D, a 2 in dimension whose two definition points sit on leg A, and notes stating units in inches, the mold line and the layer PROFILE. Right, Not ready, with five numbered faults: 1 a gap where two separate lines fail to meet at a bend; 2 a second, dashed line drawn over leg B; 3 a wavy spline drawn where a sharp bend should be; 4 a dimension reading 2.00 whose definition points sit on a charcoal wall line, not on the metal; 5 a units tag showing a question mark because no unit is stated.ReadyNot ready2 inABCDUnits: inchesMold lineLayer PROFILEwall2.00Units: ?12345

Left, ready: one continuous red line with legs A to D, a 2 in dimension whose definition points sit on leg A, and notes giving units, mold line and layer. Right, not ready: a gap at a bend, a duplicate dashed line, a wavy spline at a bend, a dimension measured on a wall line, and no stated unit.

A
Leg A
B
Leg B
C
Leg C
D
Leg D
1
Gap between two lines at a bend
2
Duplicate line drawn over a leg
3
Spline drawn where a bend should be
4
Dimension measured on the wrong element (a wall line)
5
No unit stated
Each fault changes a leg, an angle or the scale. Duplicates and overlaps are cleaned in the sender’s CAD software (Autodesk’s OVERKILL); a dimension belongs to the element its definition points lie on.

Sources

Glossary

OVERKILL
An AutoCAD command that removes duplicate or overlapping lines, arcs and polylines and combines partially overlapping or contiguous ones.
AUDIT
An AutoCAD command that evaluates a drawing’s integrity and corrects some errors; RECOVER is for errors it cannot fix.
Dimension attribution
AFS’s method of tying each dimension to the drawn element its two definition points lie on, so a dimension on a building element is labelled not a flashing dimension.
Revision Compare
AFS’s tool that reads two DXF revisions and lists added, removed and changed geometry, dimensions and notes.