PencilCADFrom iPad sketch to DXF
A DXF is how a 2D drawing gets into Fusion, Onshape, Shapr3D or a laser cutter. It stores numbers, not pixels, so a sketch only comes through usable if it was drawn at true size, with clean outlines and the right units.
1. Draw at true size
A DXF line from 0 to 150 is 150 units long, so draw each part at its real size. Sketched to a scale? Set that scale before you export.
2. Close the outlines
Only a closed outline is a profile that CAD can extrude or a laser can cut out.
3. Pick the units, and say so
Pick millimetres or inches before you start, and open the file in the same units with scale-to-fit off.
4. Use layers for what each line is for
Give each kind of line its own layer, so CAD imports just the profiles and a laser maps each layer to cut, score or engrave.
5. Open it, then check one length
Insert it into a Fusion or Onshape sketch, or open it in Shapr3D or laser software, then measure one length you know.
DXF, SVG or PDF?
A router also needs toolpaths: see sketch to G-code for a CNC router. A bent part needs a flat pattern with its bend lines on their own layer: see sheet metal flat patterns on iPad.
Sketch to DXF in PencilCAD
- Tap the toolset chip beside the page count and choose CAD; tap the units chip at the top right for mm or inches.
- Draw with Line, Rectangle, Circle and Arc; ends weld, so outlines close.
- Size it with Dimension, or write a size beside a line with Apple Pencil.
- Trim cuts overhangs; Layers hides construction.
- More → share as DXF (R2000, layers, colours) or SVG.