(1) the occasion of 1)AOI use
① AOI after printing
② AOI after pasting
③ AOI after welding
(2) defects that can be detected by 2)AOI
① AOI after printing: bridging, collapse, too much solder paste, too little solder paste, no solder paste, etc
② AOI after mounting: missed mounting of components, reversed polarity of components, offset, standing sideways, etc.
③ After welding, AOI: bridging, erecting monument, dislocation, too large solder joint, too small solder joint, etc.