Comment by throwup238

The assembly is almost all automated with pick and places machines and the board fabrication is mostly chemistry. The problem is changing tooling between each run: PNPs need their feeders changed to the right parts for each board and there’s limited space for them so they all have to be changed for every design that runs through. Same with the tooling for the board etching. This stuff is precision equipment and has to be properly aligned so it’s not just a simple matter of plugging and unplugging some parts.