The fixture should support the board and prevent distortion as the board goes through the printing, component placement, and reflow processes. Its construction should ensure adequate protection for the bottom side components during the double-sided reflow process.
Automatic machines translate to added costs and some such as the depaneling router creates vibrations, noise, and vast amounts of dust. In addition, you need to hold the board firmly. Although laser cutting is precise and has less mechanical stress, it is capital intensive and only applicable to board thicknesses of around 1 mm.
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