Design for Additive Manufacturing
Most designs are built for machining or injection moulding. We review your geometry for additive manufacturing and optimise it for AM.
Diagnosing Common Failures
Why do standard designs fail in AM?
Excessive Support Structures
Geometry is often designed without considering build orientation. This leads to excessive support usage on critical surfaces, resulting in a poor finish and material waste of over 40%.
Anisotropic Weakness
Parts oriented with critical stress loads perpendicular to the layer lines are more likely to fail. In FDM, interlayer adhesion is the weakest link, reducing z-axis strength by 25-40%.
Inadequate Wall Thickness
Features designed for machining tolerances (±0.01mm) often fail because they ignore the physical constraints of the FDM nozzle (0.4–0.6mm), leading to weak walls and under-extrusion.
Bridging & Overhang Violations
Designs that exceed 45° overhang limits without supports or assume unrealistic bridging capabilities will result in sagging features and failed prints.
Inefficient Infill Strategy
Using solid density throughout a part is rarely necessary. We optimise infill to reduce material cost and print time without sacrificing structural integrity.
Assembly Tolerance Issues
Press-fits designed for metal will not work. We adjust tolerances to account for FDM's ±0.1–0.2mm accuracy and thermal shrinkage.
Our Engineering Focus
Comprehensive DfAM analysis across FDM, SLS, and SLA processes.
Build Orientation
Strategy for stress alignment, surface finish prioritization, and multi-part nesting.
Wall & Geometry
Validation of wall thickness, minimum feature sizes, and overhang angles for the target process.
Support Structures
Engineering support-free designs or minimising interface areas to reduce post-processing.
Internal Structures
Applying variable density mapping and lattice structures to reduce weight while maximising strength.
Material Specifics
Compensating for shrinkage, warping, and anisotropy based on material properties.
Assembly Tolerances
Designing process-appropriate tolerances (FDM ±0.1–0.2mm), snap-fits, and threaded insert integrations.
When FDM is right choice?
FDM prototypes typically cost ₹1000 to 7,000. SLS or SLA equivalents run ₹8,000 to 25,000. For validation work, the difference matters.
Cost Efficiency
FDM prototypes typically cost ₹1000–7,000, compared to ₹8,000–25,000 for SLS or SLA equivalents. For early-stage iterations where geometry is still being refined, this cost difference is decisive.
Iteration Speed
In-house FDM cycles take 3–5 days, whereas external vendors often require 1–2 weeks. Faster iteration means more design loops before committing to expensive tooling or production.
Process Selection Guide
Choose FDM
For concept iteration, functional testing under realistic loads, and any stage where design is still changing. Best cost-to-iteration ratio of the three processes.
Consider SLS
When your geometry is too complex for FDM supports, when isotropic mechanical strength is required, or when you need batch quantities without per-part support removal.
Consider SLA
When feature resolution below 0.1mm is required, optical clarity is needed, or you are producing investment casting patterns.
How a DfAM Project Works
From your CAD file to a validated print-ready design. Four phases, 1 to 2 weeks.
Geometry review, stress analysis, material selection, and build orientation study for the target process.
We modify the CAD data for the target process, adjusting for FDM layer mechanics, SLS powder behaviour, or SLA resin curing.
For FDM projects, the optimised design is physically printed in-house and dimensionally verified. If it fails, we refine and reprint until it passes. For SLS and SLA, validation is done through simulation and design rule checking via our partner network.
Optimised CAD files, process parameters, and a full analysis report. FDM projects include the physical validation sample.
DfAM for Parts That Need to Actually Work
Most 3D prints fail functional testing not because the design is wrong but because the geometry wasn't optimised for AM strength.
The Testing Dilemma
Standard 3D prints often fail during functional testing (pressure, thermal, vibration) not because the design is flawed but because the AM material cannot replicate the strength of injection-moulded plastic. This produces invalid test data and wasted development cycles.
Our Solution
We optimise specifically for test-representative performance. By modifying geometry and reinforcement, we ensure the prototype withstands test loads and generates valid data before you invest ₹15 to 30 lakhs in tooling.
Engagement Model
What to expect when you engage us for DfAM work
Turnaround
Standard 1 to 2 week turnaround for complete DfAM projects. Rush options available: 48 to 72 hour expedited analysis for urgent requirements.
Requirements
Send us your CAD files along with your target process, target material, functional requirements, and estimated production volume.
Pricing
Available as per-part optimisation with a fixed quote, assembly packages with volume discount, or a monthly retainer for ongoing engineering support.
Common Questions
Answers to the questions we hear most often from hardware teams.