SMT Ionized Air Control: Balance, Decay Time and Emitter Care Ionized air is used on an assembly line to neutralise the static charge that friction and separation put on parts, boards and fixtures. It does not prevent charge being generated, and it does not replace grounding, but it removes the…

Bulk Feeder Setup: Track, Vibration and Orientation Control A bulk feeder presents loose parts to a placement machine without a tape or a tray, and it is used where the part is cheap, plentiful and awkward to package. It is common for small passives in high volume, for odd parts…

PCB Process Chiller Control: Cooling Water on Drill Lines A process chiller removes the heat that a PCB line generates and cannot get rid of by itself. It serves the drill spindles, the imaging equipment, the laser systems and sometimes the plating rectifiers, and each of those users has a…

Wave Solder Pallet Wear: Flatness, Masking and Service Life A wave solder pallet carries boards through the wave so that only the joints that need soldering are exposed, and it takes thermal and mechanical abuse on every pass. Its condition decides whether the board sits flat and whether the masking…

Dry Film Roll Storage: 5 Conditions That Protect Photospeed Dry film roll storage is treated as a warehouse detail until a panel is exposed, developed and then shows lines that are narrower than the artwork. By that point the film has been consumed and the evidence is gone. Photospeed drifts…

Panel Baking Control: 6 Rules Before Plating and Lamination Panel baking looks like the simplest step in a PCB shop: put the panels in an oven, wait, take them out. In practice the bake oven profile decides whether lamination produces voids, whether plating blisters appear, and whether a panel keeps…

Moire Fringe Alignment: 5 Checks for Inner Layer Registration Moire fringe alignment is the technique that turns layer registration from a guess into a measurement. Two concentric or offset circular patterns are printed on the artwork and on the panel, and where they overlap they produce a fringe pattern whose…

Developer Antifoam Control: 5 Limits for Clean Development Developer antifoam is one of the smallest additions in a PCB wet line and one of the easiest to get wrong. Development generates foam because the chemistry, the spray action and the dissolved resist all push surfactants to the surface. A little…

Solder Mask Ink Color Control: 6 Steps for Consistent Batches Solder mask ink color is a cosmetic property that customers treat as a quality property, and it has real technical consequences as well. Pigment loading changes viscosity, cure behavior and how completely the mask shadows ultraviolet light. Two panels that…

Conveyor Roller Maintenance: 6 Checks on Wet Process Lines Conveyor roller maintenance is the least glamorous job on a wet process line and one of the most valuable. Rollers set panel speed, control how long a panel spends in each spray zone, and hold the panel flat so chemistry reaches…