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Grid for Part Creation and Placement |
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USER2 
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Joined: 09 Dec 2014 Status: Offline Points: 4 |
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 Topic: Grid for Part Creation and PlacementPosted: 30 Sep 2019 at 10:23am |
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Hi, I have a basic question that i would like to hear opinions - What grid value we should use for any type of part creation? Surface Mount and Through-hole both small & big? What is the placement grid should be used for design? Thanks! |
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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5716 |
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Posted: 30 Sep 2019 at 10:42am |
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It depends on the type of PCB layouts you have. High Density or Low Density.
For PCB layouts that have Low Density part placements, the best PCB library "Pad Size" round-off and "Pad Place Round-off" grid would be 0.05 mm. The Part Placement Grids are 1 mm for large parts, 0.5 mm for medium size parts and 0.1 mm for small parts. For PCB layouts that have High Density part placements, the best PCB library "Pad Size Round-off" and "Pad Place Round-off" grid would be 0.01 mm. The Part Placement Grids are 1 mm for large parts, 0.5 mm for medium size parts and 0.1 mm for small parts. Trace Width is 0.1 mm and route grid is 0.05 mm. Here is the routing example where SMD via fanout is on a 0.5 mm grid system placed 1 mm apart.  |
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