CAD for 3D Printing: Preparing CAD Files for 3D Printing
3D printing workflows typically require digital 3D geometry that can be processed by slicing or manufacturing software.
A suitable CAD model can provide the geometry needed to prepare a part for a 3D printing workflow. Depending on the workflow, the final file may be provided as a mesh format such as STL or another format accepted by the intended software or manufacturer.
SYNCCAD can help prepare eligible, clearly defined CAD files for simple 3D printing-related requests based on drawings, sketches, images, measurements, or existing CAD files.
The final printing workflow remains the responsibility of the customer and manufacturer.
CAD for 3D printing refers to preparing digital 3D geometry that can be used as a reference or input for a 3D printing workflow.
A CAD model may define:
- Overall shape
- Dimensions
- Holes and openings
- Slots
- Walls and features
- Curved surfaces
- Mounting features
- Other defined geometric details
The final file format and model requirements depend on the intended printer, slicing software, material, and manufacturing workflow.
Simple 3D Parts
CAD can define relatively simple mechanical or functional parts for a 3D printing workflow.
Prototypes
A CAD model can provide digital geometry for creating physical prototypes.
Brackets and Mounting Components
Simple brackets, mounts, and similar components can be prepared from drawings, sketches, measurements, or existing CAD references.
Product Enclosures
Simple enclosure geometry can be prepared when the required dimensions and features are clearly defined.
Replacement or Custom Parts
A simple replacement component may be recreated from measurements, drawings, photographs, or existing references when sufficient information is available.
A useful 3D-printing CAD request should include enough information to define the desired model.
Provide, where applicable:
- Existing CAD file
- Dimensioned drawing
- Sketch
- Clear reference images
- Overall dimensions
- Feature dimensions
- Wall or thickness requirements
- Hole and opening dimensions
- Units
- Required output format
- Manufacturer or slicer requirements, if known
If the model will be printed by a specific manufacturer, provide its file and workflow requirements when available.
STL
STL is a common mesh format used in many 3D printing workflows.
It represents the model as a triangular mesh rather than structured CAD geometry.
STEP
STEP can be useful when the model needs to remain as structured 3D CAD geometry before being prepared for a downstream printing workflow.
Other Formats
Some software and manufacturers may support additional CAD or mesh formats.
The required output should always be confirmed with the intended workflow.
Model Scale
The intended physical dimensions should be clearly defined.
Pay particular attention to units when transferring geometry between CAD software and slicing software.
Closed Geometry
For many 3D printing workflows, the model needs to represent a closed volume.
Open surfaces or incomplete geometry may cause problems when preparing the model for printing.
Wall Thickness
Wall thickness should be considered when it is part of the design requirement.
The appropriate minimum thickness depends on the printing technology, material, and manufacturer.
Holes and Openings
Holes, slots, and openings should be represented clearly and according to the intended dimensions.
Mesh Resolution
When using an STL or another mesh format, resolution affects how accurately curved surfaces are represented.
A very coarse mesh may create visible faceting, while an unnecessarily dense mesh can increase file size.
Incorrect Scale
A model can appear correct but have incorrect physical dimensions because of unit or scaling differences.
Open or Invalid Geometry
Incomplete surfaces or other geometry problems can prevent software from interpreting the model as a printable volume.
Missing Dimensions
A sketch or image may communicate the general shape but not contain enough information to define the complete model.
Thin Features
Very thin walls, small holes, or narrow features may not be suitable for a particular printing process.
These requirements should be verified with the intended manufacturer.
Excessive Mesh Density
An unnecessarily detailed STL can become difficult to process without providing a meaningful benefit for the intended print.
1. Submit Your References
Provide the drawing, sketch, image, existing CAD file, or measurements that define the requested model.
2. Describe the Required Output
Specify the desired CAD or mesh format and any known printing workflow requirements.
3. Scope Review
SYNCCAD reviews the available information and determines whether the request is suitable for an eligible Simple CAD Job.
4. Confirm Scope and Price
Eligible Simple CAD Jobs are priced at $48.
Requests outside the simple defined scope may require additional review or a custom quote.
5. Payment and CAD Preparation
Work begins after payment is received and all required references and information are complete.
6. Deliver the CAD File
The agreed CAD output is delivered according to the confirmed scope.
For eligible Simple CAD Jobs, the target delivery time is 48 hours after payment and receipt of all required references and information.
Preparing a CAD file for 3D printing does not guarantee that the resulting part will print successfully.
SYNCCAD does not guarantee:
- Printability
- Printer compatibility
- Material suitability
- Minimum feature performance
- Support requirements
- Orientation
- Slicing parameters
- Dimensional accuracy of the physical print
- Final part strength
- Final manufacturability
The customer and manufacturer remain responsible for verifying the model against the intended printing process and requirements.
Frequently asked questions
Here are some common questions about our company.
SYNCCAD can prepare eligible simple 3D CAD models from drawings when sufficient dimensions, views, and other required information are available.
Can a DWG file be converted to DXF?
This may be possible depending on the source file, required output, and supported workflow. Some drawing information or application-specific features may not transfer exactly.
No. STL is common, but other CAD and mesh formats may also be supported by particular software and manufacturers.
Yes. A sketch can be used as a reference when it contains sufficient information to define the requested geometry.
A photo can provide useful visual information, but additional measurements, dimensions, or views may be required for accurate geometry.
No. The intended manufacturer or printing workflow must verify printability, orientation, supports, material requirements, and other process-specific factors.
No. SYNCCAD prepares CAD files. The customer selects the manufacturer for physical production.
No. $48 applies to eligible Simple CAD Jobs with a clearly defined scope. More complex requests may require additional review or a custom quote.
The target delivery time is 48 hours after payment is received and all required references and information are complete.
Related Resources
- STL File Format
- STEP File Format
- 3D CAD Modeling
- 2D Drawing to 3D CAD
- Sketch to CAD
- Product Enclosures