How to Prepare CAD Files for Laser Cutting: A Complete Singapore Guide

A CAD file is both geometry for manufacturing software and a communication package for the people who quote, plan and inspect the job. Problems arise when the geometry appears correct on screen but contains open contours, duplicate entities, inconsistent units or missing manufacturing information.

This guide explains how to prepare CAD files for laser cutting, how to match the file package to flat parts, bent sheet metal and assemblies, and what Singapore buyers should include in a quotation request. The aim is to reduce clarification—not to promise a fixed quotation time.

For the broader purchasing process, see our laser cutting services buyer’s guide. If your file is ready, jump to the copyable laser cutting RFQ checklist.

Why CAD File Quality Matters

A complete file package can reduce questions during quotation, programming and inspection. It does not remove the need for supplier review, and it does not guarantee a particular turnaround time.

• Quotation clarity. Defined material, quantity, finish and critical requirements allow the supplier to identify the required operations and assumptions.
• Geometry interpretation. Closed intended contours, consistent units and controlled layers reduce the risk of importing or programming the wrong entities.
• Manufacturing intent. A dimensioned PDF, STEP model or assembly drawing can communicate tolerances, threads, bends, datums and relationships that a flat cutting file does not contain.
• Revision control. Matching part numbers and revisions help prevent an obsolete model or drawing from entering quotation or production.

Keep three things separate: production geometry for the machine workflow, an engineering drawing for human review, and RFQ information covering commercial and delivery requirements.

Which CAD Files Should You Send?

File-format acceptance depends on the supplier’s CAD/CAM workflow. Use the following matrix as a starting point and confirm the preferred format and version before release.

How to Use PDF Files

A vector PDF may be importable in some workflows, while a scanned or raster PDF normally requires tracing or redrawing. PDF is particularly useful for dimensions, tolerances, GD&T, notes and inspection requirements. Ask whether the supplier accepts PDF as production geometry or only as a reference drawing.

How to Use STEP and IGES Files

For bent parts and assemblies, a 3D model can clarify form and relationships. STEP is commonly useful for solid geometry; IGES remains available in some workflows. The supplier may still request a separate flat file or drawing. See our STEP vs IGES vs DXF guide for the differences.

What About JPG, PNG and Screenshots?

Raster images may support preliminary discussion, but they do not reliably define production-scale vector geometry. If tracing or CAD redrawing is required, include it as a separate scope and approve the recreated dimensions before manufacture.

Common CAD and RFQ Errors

Geometry and Export Errors

Eight Drawing and Quotation-Information Errors

Geometry Checks Before Export

Automatic cleanup commands can change small gaps, narrow slots or intentionally separate features. Use a copy of the released file, review the tool output and compare key dimensions before sending. Do not apply a universal join tolerance to every drawing.

Layer & Colour Management for Cut, Engrave, and Score

If your part needs more than just cutting — engraving, scoring, or marking on the same piece — separating these operations into different layers or colours is essential. Without separation, the laser operator may see them all as the same instruction.

Colour conventions vary between suppliers, so include a quick legend in your email or as a note in the file: “Red = cut, Blue = engrave, Green = score.” The laser operator will set the corresponding power and speed parameters based on this mapping.

For engraving applications in particular, the layer setup also tells the supplier whether you need annealing, white marking, or deep engraving on metal parts — see our laser engraving metal vs non-metal guide for which method to specify.

Export from SolidWorks: Step-by-Step

Export from Fusion 360: Step-by-Step

Export from AutoCAD: Step-by-Step

Export from Adobe Illustrator & Inkscape

Good vs Bad Specification Examples

Multi-Part Assembly Submission

For an assembly, individual part files are not enough to communicate every relationship. Include:

• a top-level assembly model or drawing;
• a bill of materials with part numbers and quantities per assembly;
• matching revisions across models, drawings and the BOM;
• mating faces, critical gaps, alignment features and datum relationships;
• fastener, insert, welding and joining requirements;
• surface finishing and masking requirements;
• whether trial assembly or inspection documentation is required.

If a sample is supplied, state whether it is a visual reference, a fit reference or a controlled master. A released drawing should define the dimensions and acceptance requirements used for manufacture.

Copyable Laser Cutting RFQ Checklist

Copy the following checklist into your email or RFQ form. Complete the applicable fields and mark unknown items as “supplier recommendation requested” instead of leaving them ambiguous.

Company:
Contact:
Delivery location:
Required delivery date:

Part number:
Revision:
Prototype quantity:
Repeat-production quantity:

Material:
Grade:
Thickness:
Surface condition:

Files attached:
[ ] DXF / DWG
[ ] STEP
[ ] PDF drawing
[ ] Assembly file
[ ] BOM

Critical dimensions and tolerances:
Proposed general-tolerance basis:
Threads / countersinks / inserts:
Bending requirements:
Welding requirements:
Deburring / edge condition:
Surface finish / coating:
Visible or cosmetic faces:
Protected or masked areas:

Inspection requirements:
Material certificate requested:
Certificate of conformance requested:
Dimensional report requested:
Packaging requirements:

Additional notes:

Document and inspection requirements affect scope and price. Request them before quotation and confirm what the supplier can provide; do not assume that a CMM report, FAI, certificate or a particular general tolerance is included by default.

Keep three categories separate:

• Production geometry—the approved file used in the manufacturing workflow;
• Engineering reference—the drawing, model or assembly that communicates intent;
• Commercial RFQ information—quantity, schedule, delivery, documentation and packaging.

Frequently Asked Questions