Fused Deposition Modeling (FDM) has become one of the most widely adopted additive manufacturing technologies in the world. From functional prototypes to production tooling and end-use components, manufacturers rely on FDM because it offers an efficient, cost-effective way to produce complex geometries with a growing portfolio of engineering-grade thermoplastics.
Yet despite its versatility, one challenge has consistently limited FDM’s use for demanding structural applications: part strength.
For decades, engineers have worked to improve the mechanical performance of FDM parts by changing print orientation, increasing wall thickness, adjusting infill density, selecting higher-performance materials, and optimizing process parameters. These techniques can improve results, but they don’t eliminate one of the technology’s most fundamental limitations.
Rather than simply accepting that limitation, ADDMAN looked at the problem from a different perspective.
The result was ADDCAAM, a proprietary software platform that improves FDM part strength through intelligent toolpath optimization. That innovation was recently recognized with a Gold Edison Awardin the Manufacturing & Logistics category, honoring technologies that demonstrate meaningful real-world impact.
Understanding Why Traditional FDM Parts Are Weaker
To understand why FDM strength has remained such a persistent challenge, it’s helpful to understand how the process works.
Unlike CNC machining, where material is removed from a solid block, FDM creates parts by depositing molten thermoplastic one bead at a time. Each new layer bonds to the layer beneath it until the component is complete.
Those bonds, however, are not identical in every direction.
Within a single printed layer, continuous extruded beads generally provide excellent strength. Between layers, the material relies on thermal bonding, which is inherently less robust than the continuous material found within each deposited road.
The result is anisotropy—a material property in which strength varies depending on the direction of the applied load.
For engineers, this creates a familiar design challenge. A component may perform exceptionally well when loaded in one direction while exhibiting significantly lower strength when stresses are applied across layer boundaries.
This directional behavior is one of the primary reasons many FDM parts have historically been limited to prototypes, fixtures, tooling, or lightly loaded production components.
The Traditional Ways Engineers Improve FDM Strength
Experienced additive manufacturing engineers have developed a variety of methods to compensate for anisotropic behavior.
Common approaches include:
- Rotating part orientation to better align layers with anticipated loads
- Increasing wall thickness or shell count
- Raising infill density
- Selecting stronger engineering-grade materials
- Adding safety factors into the design
- Redesigning components specifically for additive manufacturing
Each of these methods can improve performance, but every solution introduces tradeoffs.
Increasing material usage adds weight and print time. Reorienting a part may require additional support structures. Higher-performance materials often come with increased cost. Even redesigning a component may not fully eliminate weak load paths created during printing.
These approaches optimize around the problem rather than fundamentally changing it.
Looking Beyond Hardware
When manufacturers think about stronger FDM parts, the conversation often focuses on purchasing faster printers or using stronger materials.
Those advancements certainly matter.
But there is another variable that receives far less attention: how the printer deposits the material in the first place.
Every FDM component is built from thousands of individual toolpaths generated during slicing. Those toolpaths determine bead placement, internal geometry, and ultimately how loads travel through the finished part.
If the toolpaths change, the mechanical behavior of the part can change as well.
Instead of asking how to build a better printer, ADDMAN asked a different question:
What if software could make existing printers produce stronger parts?
How ADDCAAM Takes a Different Approach
ADDCAAM—Computer-Aided Additive Manufacturing—is a proprietary software solution that rethinks traditional FDM slicing.
Rather than relying on conventional layer strategies, ADDCAAM transforms standard sliced files into an interlocking internal structure using proprietary offset bead placement and advanced toolpath optimization.
The goal isn’t simply to fill the interior of a part differently.
It’s to improve how forces are distributed throughout the printed component.
By optimizing load paths inside the geometry, ADDCAAM creates parts that better resist mechanical stresses while remaining compatible with existing FDM manufacturing platforms.
Testing has demonstrated:
- Up to 70% stronger printed parts
- Up to 100× less porosity
- Improved structural efficiency without requiring new hardware
Instead of asking manufacturers to replace their equipment, ADDCAAM helps them unlock greater performance from the FDM systems they already operate.
Why Software Is Becoming a Competitive Advantage
As additive manufacturing continues to mature, competitive advantages are increasingly coming from software rather than hardware alone.
Printer technology continues to improve, but software now influences nearly every stage of the manufacturing workflow—from build preparation and simulation to topology optimization, support generation, and toolpath planning.
ADDCAAM represents that next evolution.
Rather than treating slicing as a simple preprocessing step, it treats toolpath generation as an engineering problem capable of directly influencing part performance.
For manufacturers producing functional components, that shift has meaningful implications. Better software can improve mechanical properties without increasing machine complexity or requiring entirely new production infrastructure.
Why the Edison Award Matters
Innovation awards are plentiful, but the Edison Awards occupy a unique place within the engineering community.
Established in 1987, the program recognizes innovations that demonstrate measurable technological advancement and real-world commercial impact. Winners are selected by a panel of senior scientists, engineers, and industry leaders who evaluate each technology based on concept, value, delivery, and impact.
Receiving Gold in the Manufacturing & Logistics category recognizes more than technical novelty.
It validates an engineering solution that addresses one of additive manufacturing’s longest-standing limitations.
For ADDMAN, the award reflects years of research focused on helping manufacturers produce stronger, more reliable FDM components through software innovation.
The Future of FDM Is About More Than Better Printers
FDM already represents the majority of installed 3D printing systems worldwide, making improvements to the technology meaningful across an enormous installed base.
As more manufacturers evaluate additive manufacturing for production—not simply prototyping—the conversation is shifting.
Instead of asking whether additive manufacturing is capable, engineers are asking how to maximize the performance of the systems they already have.
Advances in software, toolpath optimization, and process intelligence will play an increasingly important role in answering that question.
ADDCAAM demonstrates that sometimes the biggest improvements don’t come from changing the printer—they come from changing the way it thinks.
Learn More About ADDCAAM
The Edison Award recognizes a significant milestone, but the larger story is what the technology makes possible for manufacturers.
By improving load distribution through proprietary toolpath optimization, ADDCAAM helps engineers produce stronger, more structurally efficient FDM parts while preserving the speed, flexibility, and accessibility that have made the technology one of the most widely used additive manufacturing processes in the world.
If you’re interested in learning more about the technology behind ADDCAAM—or how intelligent toolpath optimization can improve the performance of your FDM applications—visit the ADDMAN ADDCAAM page to explore the software in greater detail.
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