This medical-device project covered hardware verification, EMC and safety testing, firmware development, and production support. My work connected laboratory investigation with factory execution to reduce assembly and test defects and move the product safely toward certification and shipment.
Board-level debugging and hardware correction
The product was already in late-stage validation, but unit-level defects continued to affect quality. I worked on board bring-up, assembly review, and production debugging across power modules, UART stability, shutdown behavior, X/Y motion, limit switches, and mechanical or PCB assembly errors.
Beyond root-cause analysis and verification, I helped update engineering drawings and assembly instructions and coordinated urgent part revisions with local machine shops. These changes reduced downstream unit failures and improved consistency across certification and production units.
EMC and safety validation
Medical equipment must pass demanding EMI, EFT, surge, and ESD tests. I worked with the hardware team to trace failures across power architecture, PCB layout, shielding, cable routing, and grounding, then applied targeted changes based on measurements.
I supported third-party laboratory testing, evaluated alternative power supplies, reviewed interactions between the stand and enclosure, and added filters and chokes along high-noise paths. For the main-board power architecture, I also evaluated isolated DC/DC modules and layout changes to reduce conducted and radiated emissions, moving the design from active debugging toward certification readiness.
Motion control and peripheral integration
The firmware coordinated multiple motors, button inputs, display configuration, and external devices. I developed validation scripts, graceful shutdown, micro-switch control for X/Y/F axes, a MEMS tilt-sensor driver, and a serial binary protocol for peripheral communication.
I also corrected unexpected motor glitches, improved display rotation on production units, and updated firmware-upgrade tooling so laboratory and field validation could use a repeatable workflow.
Foot-control subsystem
I contributed to the foot-control schematic, PCB layout, prototyping, and validation of its interface with the main system. The design balanced electronics, mechanical packaging, interaction consistency, and long-term field reliability, preparing the subsystem for broader evaluation.
Production and field support
Beyond development, I reviewed assembly quality, established diagnostic workflows, traced recurring defects, and supported motor and system issues remotely. Closing the loop among lab results, engineering documentation, and field feedback was essential to maintaining shipment readiness.