Tech Note: Drawing File

Drawing File Guidelines

Before quoting a new project, our customer provides a drawing of the part, guidelines on important features, and requested quantities and delivery.

Some drawings communicate better than others. Furthermore, even exceptionally clear drawings, like solid models, are sometimes useless for laser-cutting processes. Here are some tips for making drawings that communicate what you want:

Simple Geometry
Intricate Geometry
An engineering drawing in any form.

(For very simple projects, a faxed sketch copied from the back of an envelope will do. Just make sure it has all the relevant information requested on the RFQ Template!)

An electronic drawing file

Electronic Drawing Files

  • dxf, .dwg., or .igs formats (.dxf preferred)
  • Critical dimensions (if electropolishing is requested, dimensions should be post-polish)
  • Gaps or slots between adjacent features should be wide enough to accommodate all the necessary material removal: the laser beam kerf and electropolishing. The beam width and the electropolishing vary widely between applications. On the low end, a gap of 20microns (0.0008”) might be enough. In some cases, you need to leave 0.12mm (0.005”) between features. When in doubt, contact us to discuss your application.
  • No polylines, splines, blocks, or ellipses. If you must submit drawings with these drawing features, be advised that they will be converted to short little line segments, compromising the quality of your part.

For tubular parts, Lumenous needs a flat, unrolled drawing of your device:

  • The x-axis represents the longitudinal axis of the tubing
  • The y-axis represents the circumference of the device
  • Important: the circumference of the unrolled drawing should equal the tubing circumference.

For parts that require shapesetting, an additional drawing should specify the final shaped dimensions and configuration.