https://dfamacademy.com/guides Practical Design for Additive Manufacturing guides. en-us Thu, 23 Jul 2026 00:00:00 GMT https://dfamacademy.com/guides/3d-print-infill-density-patterns https://dfamacademy.com/guides/3d-print-infill-density-patterns How infill density and pattern affect 3D print strength, weight and print time — recommended infill percentages by use case, and why walls beat infill for strength. https://dfamacademy.com/guides/3d-printing-cost-estimation https://dfamacademy.com/guides/3d-printing-cost-estimation What drives a 3D-printed part's price: machine time, material and support waste, labor, amortized machine cost, orientation, nesting and process bands. https://dfamacademy.com/guides/3d-printing-materials-comparison https://dfamacademy.com/guides/3d-printing-materials-comparison PLA vs PETG vs ABS vs ASA vs Nylon vs PC — strength, temperature, printability and when to use each FDM material, with a side-by-side comparison table. https://dfamacademy.com/guides/3d-printing-post-processing https://dfamacademy.com/guides/3d-printing-post-processing Post-processing 3D prints by process: support removal, bead blasting, tumbling, vapor smoothing, machining, dyeing, sealing watertight, and painting. https://dfamacademy.com/guides/3d-printing-supports https://dfamacademy.com/guides/3d-printing-supports When 3D printing supports are required, support types (normal vs tree, soluble vs breakaway), interface settings for clean removal, and design techniques to eliminate supports. https://dfamacademy.com/guides/3d-printing-tolerances https://dfamacademy.com/guides/3d-printing-tolerances Realistic dimensional tolerances for FDM, SLA, SLS, MJF and metal AM — plus hole compensation, fit allowances, and when to machine a printed part instead. https://dfamacademy.com/guides/am-process-selection https://dfamacademy.com/guides/am-process-selection A practical filter for choosing between FDM, SLA, SLS, MJF, metal PBF, binder jetting and DED — geometry, material, quantity, and cost drivers with a comparison table. https://dfamacademy.com/guides/bridging-3d-printing https://dfamacademy.com/guides/bridging-3d-printing Learn how bridges work, how far FDM can span with cooling, and how to design gaps and chamfers that print clean without supports. https://dfamacademy.com/guides/design-for-assembly-am https://dfamacademy.com/guides/design-for-assembly-am Design printed parts that assemble fast and correctly: lead-in chamfers, self-locating joints, fit clearances, snap-fit vs fastener choices and poka-yoke. https://dfamacademy.com/guides/dfam-checklist https://dfamacademy.com/guides/dfam-checklist A 30-point Design for Additive Manufacturing checklist covering process fit, geometry, orientation and strength, materials, and release — use it as a pre-print design review. https://dfamacademy.com/guides/dfam-vs-injection-molding https://dfamacademy.com/guides/dfam-vs-injection-molding When to switch from 3D printing to injection molding: break-even math, bridge tooling, and the draft, wall, and gate redesign the crossover forces. https://dfamacademy.com/guides/dimensional-accuracy-3d-printing https://dfamacademy.com/guides/dimensional-accuracy-3d-printing Understand shrinkage, over-extrusion, and thermal error, then calibrate flow and steps and design with compensation for accurate FDM parts. https://dfamacademy.com/guides/enclosure-design-3d-printing https://dfamacademy.com/guides/enclosure-design-3d-printing Design 3D-printed electronics enclosures: walls, snap-fit vs screw bosses and inserts, PCB standoffs, lids, vents, cable ports and button fit. https://dfamacademy.com/guides/fdm-overhang-angles https://dfamacademy.com/guides/fdm-overhang-angles Where the 45° overhang rule comes from, when it's wrong, and the chamfer, teardrop, and bridging techniques that let you design FDM parts with no supports at all. https://dfamacademy.com/guides/fdm-wall-thickness https://dfamacademy.com/guides/fdm-wall-thickness Minimum and recommended wall thickness for FDM 3D printing, by nozzle size and use case — plus the perimeter math, rib design, and the failures thin walls cause. https://dfamacademy.com/guides/first-layer-bed-adhesion https://dfamacademy.com/guides/first-layer-bed-adhesion Dial in first layer height, nozzle gap, bed prep, brims and rafts, and stop elephant foot for reliable FDM prints. https://dfamacademy.com/guides/food-safe-3d-printing https://dfamacademy.com/guides/food-safe-3d-printing Is 3D printing food safe? Food-grade filament vs a food-safe part, layer-line bacteria, brass-nozzle contamination, sealing and heat limits. https://dfamacademy.com/guides/gdt-for-3d-printed-parts https://dfamacademy.com/guides/gdt-for-3d-printed-parts GD&T for 3D printed parts: which tolerances AM holds, datum selection, calling out build orientation, and how a printed-part drawing differs. https://dfamacademy.com/guides/large-format-3d-printing https://dfamacademy.com/guides/large-format-3d-printing Design large-format 3D prints: build-volume limits, splitting and joining with dovetails, pins and bolts, warp control and smart seam placement. https://dfamacademy.com/guides/lightweighting-lattices https://dfamacademy.com/guides/lightweighting-lattices When lattices pay off, lattice types (strut, gyroid/TPMS), the topology optimization workflow, process fit and powder/resin escape for lightweight AM parts. https://dfamacademy.com/guides/metal-am-design-rules https://dfamacademy.com/guides/metal-am-design-rules Design rules for metal LPBF/DMLS: overhangs, residual stress, wall and channel minimums, powder escape holes, machining stock and heat treatment. https://dfamacademy.com/guides/part-consolidation-dfam https://dfamacademy.com/guides/part-consolidation-dfam Consolidate assemblies into single AM parts: which parts to combine, integrating joints, tolerance-stack benefits, and when not to consolidate. https://dfamacademy.com/guides/print-orientation-strength https://dfamacademy.com/guides/print-orientation-strength Why FDM parts are weak across layers, how print orientation controls strength, surface finish and supports, and how to orient parts so loads run along layers, not across them. https://dfamacademy.com/guides/sla-resin-design-rules https://dfamacademy.com/guides/sla-resin-design-rules Design rules for SLA and DLP resin printing: hollowing, drain and vent holes, wall minimums, supports, orientation, and post-cure. https://dfamacademy.com/guides/sls-mjf-design-rules https://dfamacademy.com/guides/sls-mjf-design-rules Design rules for SLS and MJF nylon powder printing: wall minimums, escape holes, clearances, packing density, dimensional spread, and dyeing. https://dfamacademy.com/guides/snap-fit-design https://dfamacademy.com/guides/snap-fit-design How to design cantilever snap-fits and living hinges for FDM: material choice, print orientation, deflection and strain limits, and the geometry that survives repeated flexing. https://dfamacademy.com/guides/threaded-inserts-fasteners https://dfamacademy.com/guides/threaded-inserts-fasteners Heat-set inserts, tapped holes, thread-forming screws and captured nuts for 3D printed parts: hole sizing, boss design and torque limits that hold. https://dfamacademy.com/guides/warping-troubleshooting-3d-printing https://dfamacademy.com/guides/warping-troubleshooting-3d-printing Why 3D prints warp: differential cooling and shrinkage, which materials are worst, plus design and process fixes for corner curl and lifting.