Plating Filter Pump: 4 Checks for Bath Turnover A plating filter pump moves the bath through a housing where the particulate is captured and returns the clean solution to the tank. It is the least glamorous piece of equipment on a plating line, and it is the one that quietly…

PCB Drill Bit Specification: Process Details and Inspection Points Buyers and engineers often focus on the finished product and forget the production line behind it. In practice, most field failures can be traced back to process decisions made during assembly. Understanding PCB drill bit specification gives you a practical advantage…

Component Height and Clearance Verification Component height is a mechanical parameter that decides whether an assembly can be built at all, and it is usually verified with a drawing rather than with a measurement. A part that is 0.3 mm taller than its nominal value can collide with a placement…

Auto-Insertion Process Control for Through-Hole Assembly Auto-insertion is the mechanised placement of through-hole parts, and it succeeds or fails on mechanical tolerances rather than on electrical ones. The machine pushes a lead into a hole with a defined force, and if the lead span, the hole position and the clinch…

Flux Density and Specific Gravity Control in Wave Soldering Flux density is the parameter that decides how much active chemistry reaches the joint, and it is also the parameter most often checked with a single hydrometer reading taken at the start of a shift. A wave soldering machine running on…

Lead Trimming and Clinch Control After Wave Soldering Lead trimming and clinching look like finishing operations, but they apply mechanical loads to joints that have just been soldered. A blade that shears instead of cutting, or a clinch that is bent too tightly, can crack a fillet or lift a…

Micro-Hardness Testing of Plated Copper in PCB Fabrication Micro-hardness is one of the few measurements that describes the quality of plated copper rather than its quantity. Thickness tells you how much metal was deposited, while hardness tells you how the deposit will behave when the board is drilled, routed, thermally…

Solder Paste Hot Slump and Reflow Preheat Control Hot slump is the movement of a solder paste deposit after printing but before the alloy melts, and it is caused by the paste softening as it warms rather than by anything mechanical. A deposit that was well formed at the printer…

PCB Drill Bit Sample: A Factory-Floor Review Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB drill bit sample from the perspective of a PCBA factory floor, covering…

Direct Metallization Control for PCB Plated Through Holes: 6 Rules Direct metallization is a family of processes that make a drilled hole conductive without the electroless copper step that traditionally followed desmear. The hole wall is treated with a conductive material, usually a carbon or graphite dispersion or a conductive…