Description: The SMT Visual Inspection process validates the minimum requirements for the PCBA. Unlike Visual Inspection for Plated Through Hole (PTH) PCBAs which occurs after soldering, SMT Visual Inspection takes place prior to solder reflow when the solder paste is soft and allows for components to be corrected by the visual inspection operator.

SMT Visual Inspection Cycle Time is the sum the time required to perform the visual inspection of the PCB prior to reflow and the transport time of the PCB along the In-Line Workstation. The visual inspection time is currently set as a machine variable of 30 seconds. This may be altered later based on customer's specification, but this is a good average time for the inspection of an average PCB prior to insertion in reflow oven.

PSO: Fiducial Quantity

PSO: Clean Frequency

Global Inputs: PCB Length, PCB Width, PCB Thickness & Pocket Existence Check