3D CAD Modeling





Different kinds of CAD call for different ways of thinking about how to use them and how to create virtual parts.

Many companies make entry-level 2D systems, and some of them are even open source or available for no cost at all. Since these can be modified as needed during the final draft’s creation, they offer an alternative to hand drafting that eliminates the need to worry about scale and placement on the drawing sheet.

3D wireframing is essentially a 3D version of a 2D drawing (not often used today). It’s up to the artist to draw each line. The finished product has no mass properties and can’t have holes or other features added to it directly. Although many 3D systems allow using the wireframe model to make the final engineering drawing views, the operator approaches these in much the same way as 2D systems.

The creation of these 3D “dumb” solids is very similar to the manipulation of physical objects (not often used today). Solid volumes are assembled or subtracted from standard 3-D geometric shapes (prisms, cylinders, spheres, etc.) in much the same way that one would assemble or cut physical objects. The models can be quickly converted into projectable two-dimensional views. Most standard implementations of 3D solids lack the necessary controls for freely moving parts, limiting their range of motion, and detecting collisions.


There are two types of 3D solid modelling

Parametric modelling

enables the user to make use of “design intent.” It’s possible to alter the final product. Making alterations to the original design process is a viable option for future tweaks. The operator should place features in the model from the part’s center if that is how the feature was originally intended to be placed. Any available geometric object in the part could be used to locate the feature, but doing so would be counter to the design goals. The parametric modeler can make adjustments to the part while keeping its geometric and functional relationships the same if the operator designs the part as it functions.

Direct or Explicit modelling 

enables geometry to be modified without resorting to a revision history tree. Once a sketch is used to generate geometry in direct modelling, it becomes part of the generated geometry and the designer can make changes to it without referring back to the original sketch. Analogous to parametric modeling, direct modeling can incorporate connections between carefully chosen geometries (e.g., tangency, concentricity).


What is a 3D CAD Modelling Service?

A 3D CAD Modelling Service uses 3D CAD Software such as Solidworks, Inventor, Catia or Pro-E for creating components in 3D. 3D CAD packages (as the name suggest) create 3D CAD models first from which one then an produce:

  • Fully Dimensioned Drawings to Australian Standard

  • Renders/Visualizations

  • 3D Print files (STL)

  • Interference Checks (Collisions, Alignment etc.)

  • Animations

What 3D CAD Modelling Services does HandToCAD offer?

Even though most of our drawings, like Manufacturing Drawings, are 2D, most of our designs begin life in 3D CAD (so you can print them on paper). Simple Mechanical and Electrical Drawings (MEP) and Schematics are all we need, so we stick to 2D CAD (Autodesk AutoCad). Anything else is made in 3D first, as that is the most time- and labor-saving method of making drawings today.

The fact that alterations to components are not made in the drawings but rather in the 3D CAD model is also relevant. Auto-update occurs in the Drawings (although some manual adjustment to dimensions may be required). However, it is not necessary to verify the alignment of all drawing views after making an update.

Solidworks is used for the vast majority of our projects. Our VAR provides us with a number of Solidworks licenses, and we are proud owners of all of them.

Drawings Types that start of as 3D Models are:

  • Datasheets

  • Manufacturing Drawings

  • Fabrication Drawings

  • Patent Drawings

  • Shop Drawings

3D Drafting Design Tools and Software

Our Professional Drafters are well-versed in all the programs necessary for your operation. AutoCAD, ArchiCAD, Solidworks, Revit Architecture, Architectural Desktop, Microstation, and 3D Studio Max are just some of the drafting and design programs we’ve managed to pull off without a hitch.