For many U.S. and EU industrial startups, finalizing a BOM and Gerber files is just the start. A U.S.-based industrial electronics startup recently learned this the hard way: their PCB design was solid, but their custom injection-molded enclosure arrived warped, lacking critical ultrasonic welding ribs. Their packaging designs were unprintable, and U.S.-sourced magnets/sensors dragged lead times to 4 weeks. Enter Fumax’s turnkey service—here’s how we turned their chaos into a 98% yield production line.
BOM Audit: Cutting Costs Without Cutting Corners
The startup’s initial BOM flagged two red flags: over-reliance on U.S. suppliers for magnets and sensors (high costs, long lead times) and no backup for their faulty enclosure vendor. Our team acted fast:
We identified three verified Chinese suppliers for magnets and sensors, matching U.S. specs (e.g., 12mm neodymium magnets with 1.2T strength) but slashing costs by 15% and lead times from 4 weeks to 5 days.
We replaced their unreliable enclosure supplier with our in-house structural engineering team, bypassing the need for the startup to source anew.
DFM Rescue: Guiding the Supplier to Fix the Enclosure
The startup’s enclosure had two fatal flaws: warping (due to uneven 1.2mm wall thickness) and poorly designed welding ribs that failed to seal. Our engineering team took action:
We created revised 3D drawings, adjusting wall thickness to a uniform 1.5mm (eliminating warping in tests) and redesigning the ultrasonic welding ribs with precise 0.8mm gaps—critical for secure bonding.
We walked their existing supplier through the drawings, highlighting key tolerances and tooling adjustments. Within a week, the supplier produced samples that passed our warpage and sealing tests.
We also adjusted screw hole placement to avoid PCB damage during assembly—small tweaks that cut manual labor time by 12%.
Supply Chain: Packaging and Parts, Handled
The startup’s engineer struggled with packaging: their rough sketches lacked print-ready AI files and ignored anti-static needs for industrial electronics. Our solution:
Partnered with a packaging specialist to convert sketches into AI files, adding anti-static inserts and print bleeds (critical for mass production).
Managed end-to-end sourcing for all components—magnets, sensors, enclosures—with incoming quality checks (IQC) to verify specs (e.g., sensor accuracy within ±2%).
Testing and Production: From 92% to 98% Yield
Unlike their former Mexican supplier (92% yield), we built in rigor:
Custom test jigs with built-in voltmeters checked sensor outputs (e.g., 3.3V signals) in 30 seconds vs. 4 minutes manually.
Tracked yield at every step: PCBA (97%), enclosure assembly (99%), final test (98%).
Shared weekly reports highlighting a minor PCB trace issue (causing 2% sensor failures). The startup used this data to tweak their design, boosting overall yield to 98%.
Why Turnkey Matters
The startup’s journey shows the value of one partner managing it all: no chasing vendors, no surprise delays, and insights to improve your design. Whether you’re stuck on enclosures, packaging, or parts sourcing, we turn your BOM into a production-ready reality.
Send your BOM, Gerber files, and goals today. We’ll deliver a 24-hour audit, cost-saving insights, and a dedicated PM to guide you—just like we did for this U.S. startup.
