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Speed to functional test: Rapid iteration—get functional SLA prototypes in days rather than weeks.
Complex geometry, no tooling: SLS enables interlocking assemblies and thin features without fixtures.
Design support included: Pre-print DfAM review, wall-thickness checks, and printing orientation optimization reduce failures.
Industrial quality control: ISO-style inspection reports, dimensional reports, and recommended post-processing.
Trust signal idea: Show verified case studies, per-part inspection certificates, and short bios of lead engineers (name, title, 5–10yr experience) to boost EEAT.
SLA (Stereolithography)
Best for: High-detail visual models, smooth surface finishes, tight feature resolution (<0.1 mm).
Typical materials: Rigid resins, engineering resins (tough, high-temp), castable resins.
Typical tolerances: ±0.1–0.2 mm for small parts (depends on geometry).
Finishes: Clear, painted, vapor-smoothed, electroplated.
SLS (Selective Laser Sintering)
Best for: Functional prototypes, complex assemblies, durable nylon-like parts (PA12, PA11).
Typical tolerances: ±0.2–0.5 mm (scale with part size).
Advantages: No support structures, good mechanical properties, reusable powder reduces cost for larger batches.
File types: Submit STL for simple parts, STEP/IGES for assemblies and exact geometry.
Wall thickness: SLA minimum ~0.6 mm; SLS minimum ~1.0–1.2 mm (depends on resin/nylon).
Hollow parts: Include escape holes (≥2–3 mm) for resin removal in SLA.
Feature size: Avoid features <0.5 mm unless decorative.
Draft & radii: Add small fillets to reduce stress concentrations.
Orientation: Orient to minimize supports on critical surfaces; consider dimensional shrinkage compensation.
Assembly tolerances: Leave typical clearance 0.2–0.5 mm for snap fits (test on 2–3 prototypes).
Text & labeling: Raised text ≥0.8 mm height, recessed text ≥0.4 mm depth.
Overhangs: SLA supports fine but remove finish-critical supports manually; SLS is better for overhangs.
Consolidation: Combine small components into a single print to reduce assembly time where feasible.
Quote & DfAM check (0.5–24 hours): Fast quotes for standard parts; complex jobs require engineering review.
Design adjustments & file prep (1–2 business days): Suggested changes, hollowing, adding drains.
Printing (1–7 days): SLA often 1–3 days; SLS 2–7 days depending on queue and batch size.
Post-processing & QA (1–3 days): Washing, curing, powder removal, sand/coat, dimensional inspection.
Shipping: Regional options 1–5 days.
Example (anonymized aggregated result): after implementing a DfAM pass, clients typically see a 30–60% reduction in print failures and a 40% shorter total prototype cycle (engineering review → first prototype). (Illustrative aggregated data from multiple projects — use your own project numbers where available.)
Volume & batching: SLS benefits from batch runs — multiple parts in one build reduce per-part cost.
Part packing orientation: Efficient packing can lower cost per part by up to 50% in SLS.
Material choice: Engineering resins > standard resins in price; nylon (PA12) cost-effective for functional batches.
Design choices: Thinner walls, minimized support contact, and consolidated parts reduce material and labor costs.
Buyer tip: Request a “cost breakdown” line-itemizing material, machine time, labor, post-processing, and inspection fees for transparent purchasing decisions.
Dimensional inspection: CMM or high-precision calipers for critical features.
Mechanical testing: Tensile or flex tests for critical load-bearing prototypes.
Surface & cosmetic checks: Compare against color/finish specifications; provide photographic evidence.
Traceability: Batch/lot numbers for material and print job metadata.
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