The Basics of 3D Printing

3D printing transforms digital designs into real objects The foundation of this process lies in Computer-Aided Design (CAD). The quality of your digital model directly impacts the success of your 3D print.

Stripping the 3D printing workflow to its essentials, the process begins with Computer-Aided Design (CAD), followed by slicing, printing, and post-processing.

Where To start

Before even opening CAD software, you need to have a good idea on what it is you want to achieve with your 3D print. A great starting point is with a good design brief, (check out our tips for writing a killer design brief). Once you have his sketch out your idea and define its requirements: purpose, critical dimensions, and materials. This framework informs your design choices.

3D Modelling

Choosing the right CAD software is essential. Parametric modelling software (SolidWorks) excels for functional parts requiring precision and future modifications, using sketches defined by dimensions and constraints. Direct modelling is better for quick concepts, while sculpting software suits organic shapes. Beginners can start with user-friendly options like Tinkercad. For most functional prints, parametric software is preferred. Here at Mouse we use a variety of software depending on your products requirements.

Need professional CAD models for functional prints or complex designs?

Just like we choose the best software for the job, we’ll apply the right expertise to your project. Tell us about your CAD needs.

How does CAD work?

The core of CAD work involves building your digital object. In parametric software, you’ll:

• Sketch:Create 2D profiles.
• Constrain:Define relationships between sketch elements.
• Dimension:Apply precise numerical values. Fully defined sketches are crucial.
• Create Features:Use tools like Extrude, Revolve, Sweep, and Loft to transform sketches into 3D forms. Refine with features like holes, fillets, and shells.

Design for Additive Manufacturing (DfAM) is critical.

• Wall Thickness:Ensure structural integrity and printability.
• Overhangs & Supports:Minimise unsupported horizontal sections or plan for removable supports.
• Tolerances & Clearances:Account for printer accuracy in interlocking parts (allow small gaps).
• Fillets & Chamfers:Improve strength and aesthetics.
• Part Orientation:Affects strength and surface finish.

Prep for Print

Before exporting, validate your model for errors and interferences. Critically double-check and triple-check the critical dimensions.

Finally, export your model in a compatible format. When exporting, consider the resolution, which affects the smoothness of curved surfaces. A medium to high setting is best at the sacrifice of file size and speed of print.

The exported file then goes to slicing software, which generates layers and G-code instructions for the printer. The printer then builds your design layer by layer.

Meticulous CAD work is fundamental to successful 3D printing. Understanding parametric modelling, applying DfAM principles, and carefully preparing your digital blueprint are essential skills. Investing in detailed CAD work will ultimately lead to higher-quality and more functional 3D printed objects.

Feeling overwhelmed by CAD options?

Whether you’re just starting out or need intricate parametric models, our CAD services provide the support you need.

Let’s discuss your design vision.