Jewelry CAD designing is an intriguing and creative profession, but it comes with its own set of challenges, especially when striving for perfection. As a company providing jewelry CAD designing services for the US market since 2013, we have completed over 15,000 custom CAD models across various genres and levels of complexity. This extensive experience has helped us identify some common mistakes that CAD designers tend to make. By addressing these mistakes, designers can significantly enhance the quality of their CAD models.
Not taking into account the model proportions properly
Two critical aspects of jewelry design are aesthetics and manufacturability, both of which are impacted by proportions. The various elements of a jewelry piece should be designed to complement the body part it adorns, harmonize with each other, and align with the stones used. Additionally, proportions must consider manufacturability, ensuring the design elements and the overall piece are practical to produce.
Overlooking stone settings
Stone settings are the centerpiece of any jewelry design. Poorly executed settings can make the design appear awkward. Settings should enhance the stone’s prominence without overshadowing it. Furthermore, they must adequately support the stone while avoiding excessive bulkiness or flashiness. Striking the right balance is key. Modern styles, such as U- cuts or claw prongs, can add a stylish touch and should be explored by CAD designers.
Adding Excessive Details
While a sketch might feature intricate details, a CAD designer’s job is to interpret the concept and create a manufacturable design. Excessive details that are difficult to produce can complicate manufacturing. A CAD designer serves as a bridge between the sketch artist and the production manager, ensuring the design remains true to the concept while being practical for production. Communicating effectively with the artist to simplify overly intricate designs is crucial.
Overlooking Shrinkage Allowances
Shrinkage can occur during the transition from CAD to the finished piece. This typically happens in two stages:
- During the creation of a liquid mold if the model is 3D-printed in resin, followed by the production of a silicone mold.
- Occasionally during casting, though this is less common.
A skilled CAD designer should account for these processes and incorporate appropriate shrinkage allowances into the model.
Not Understanding Manufacturing Processes
Jewelry manufacturing involves various methods, depending on the design. For example, chains are typically made using chain-making machines, rings are often cast, coins are stamped, and bangles or pendants may be milled using CNC machines. A lack of understanding of these methods can lead to impractical designs. For instance, a stamping die for coins requires careful consideration of undercuts, which are permissible in casting but not in stamping. Guidance from a senior production manager can be invaluable for complex designs.
Designing Uncomfortable Jewelry
Ergonomics is vital for jewelry design, ensuring pieces are comfortable to wear, whether they are rings, bracelets, earrings, or pendants. A great-looking design is futile if it is uncomfortable. CAD designers must consider the end user’s comfort and design accordingly.
Misusing Findings
Findings are small components that link, hold, or secure jewelry parts. A CAD designer must understand which findings are readily available and avoid designing custom mechanisms unnecessarily. Manufacturing custom findings can complicate production, especially when suitable alternatives are easily accessible.
Underestimating Structural Integrity
Designing jewelry too thin compromises durability, while making it excessively thick wastes material and creates a bulky appearance. Striking the right balance ensures the piece is both durable and visually appealing.
Skipping File Optimization
Most CAD models are 3D-printed before casting. Models with unnecessary details, overlapping surfaces, or unresolved geometries can hinder printability and produce poor results. These issues can also arise during rendering. Cleaning up the CAD file and repairing the STL export ensures a smoother printing process.
Ignoring Polishing Requirements
Designs should consider the polishing requirements of the final piece. While modern techniques like electropolishing can reach narrow crevices, not all jewelers have access to such methods. CAD designers should ensure elements are spaced appropriately for standard polishing techniques.
Balancing Aesthetics, Ergonomics, and Manufacturability
As jewelry design grows more complex with intricate shapes, textures, and AI-generated art, CAD designers must balance aesthetics, comfort, and manufacturability. Effective communication with artists, customers, and production managers can save time and reduce the need for revisions.
This article is written by Vikrant Rawa, who has over 15 years of experience providing technology solutions to jewelers worldwide in CAD, 3D printing, and other jewelry manufacturing processes.
Providing Custom CAD Solutions Since 2013