A corner chamfer by pin 1 helps if the component should not be assembled inverted. Resistors and non-polarized capacitors don't need a corner chamfer because they can be inverted during assembly. But all IC's and polarized discrete passive components need a corner chamfer because they only have 1 assembly option. But the point is right on. Assembly outlines for assembly drawings do not need to be complex shapes to show off an individual's artistic personality. They should be simple rectangle or circle because the only one who ever sees the assembly drawing is the assembly shop. Why spend a lot of time on something that no one cares about. After the assembly process or after the assembly shop automates the assembly line, the assembly drawing is archived along with the Gerber data and most of the time never seen again. However, there are some PCB designers who import DXF files with complex details of many line segments representing the physical component. They use these imported lines for both the silkscreen and the assembly drawing. Unfortunately the artistic silkscreen gets covered up by the component body during assembly so the EE engineer or the end consumer never gets to see it. So why do it? This is a real question that I need to know what is the reason to do this? To me, it makes the Footprint file size large and when you put a lot of these in your PCB layout, the file size gets large and it takes longer to post process, uses up more silkscreen ink (unnecessarily) and makes the assembly drawing size larger. All of this translates into expense for the corporation (the company you work for). Simple is better. PCB designers would be better off to use their artistic qualities on a hobby. But alas, PCB design is some people's hobby. If you have a lot of time on your hands and your company does not care about the additional expense to create complex silkscreen and assembly outlines, then go for it.
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