Prototyping is essential to turning an idea into a working product—but many prototypes fall short. Whether it’s due to poor planning, material choice, or design flaws, these failures can slow down development and cost time and money. In this post, we’ll cover five of the most common prototyping mistakes—and how to avoid them.
1. Designing for Aesthetics, Not Function
The Mistake:
Focusing too much on the look of the part and not enough on real-world use—like structural integrity, tolerances, or part fit.
How to Avoid It:
-
Clearly define your prototype’s purpose (visual, functional, fit test).
-
For functional prototypes, prioritize realistic materials and accurate dimensions.
-
Use MJF or SLS over FDM when strength, accuracy, or surface finish matters.
2. Skipping Tolerance Considerations
The Mistake:
Assuming all parts will print exactly as designed, without accounting for shrinkage, wall thickness, or fitment.
How to Avoid It:
-
Use a tolerance guide specific to your chosen 3D printing method (e.g., HP MJF tolerances of ±0.3mm or ±0.3%).
-
Avoid features like sharp corners or thin walls that may warp or print inaccurately.
-
Work with a print provider (like JawsTec) that reviews parts for printability.
3. Using the Wrong Material
The Mistake:
Selecting a material based on price or familiarity, rather than how it performs under stress, heat, or flexibility.
How to Avoid It:
-
Match your prototype’s function to the right material:
-
PA12 for strong, functional parts
-
TPU for flexible designs
-
SLA resins for fine detail or aesthetic models
-
-
Use material guides or consult with your print provider for recommendations.
4. Not Iterating Enough
The Mistake:
Assuming the first prototype will be perfect—or only doing one round before production.
How to Avoid It:
-
Plan for multiple iterations and budget accordingly.
-
Make small, incremental changes to isolate variables.
-
Use rapid turnaround methods like MJF to prototype quickly and often.
5. Ignoring Post-Processing Needs
The Mistake:
Forgetting that raw prints may need additional finishing—like smoothing, dyeing, or fitting adjustments.
How to Avoid It:
-
Factor in post-processing early—especially for client-facing models or parts requiring tight tolerances.
-
Understand the options available:
-
Polishing for smoothness
-
Vapor smoothing for sealing and appearance
-
Dyeing for visual impact
-
-
Choose a print partner that offers in-house finishing (like JawsTec).
Conclusion:
Prototyping is one of the most powerful tools in product development—but it’s only effective when done right. Avoiding these five common mistakes helps ensure your prototypes bring you closer to a production-ready product, not further away. Need help choosing the right material, design specs, or print method? Contact JawsTec’s team of experts—we’re here to help your ideas succeed.
Last Updated: