When evaluating a PCB plating machine, buyers must focus on plating uniformity, current density control, and tank capacity. Ensure the machine supports high-aspect-ratio plating if you are producing multilayer boards. Key components should include titanium or stainless steel heating elements, PP or PVDF anti-corrosion tanks, and a precision PLC control system to manage dwell times and chemical dosing. For high-end applications, look for pulse plating technology which significantly improves copper distribution in micro-vias.