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Format |
Recommended Details |
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Protel |
*.pcb , Dbb most versions , Altium 7.8 |
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Pads |
Pcb ASCII up to ver 4.0 |
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Emcad |
*.emp, |
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Tango |
ASCII |
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Eagle |
Ver 5.85 |
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DXF |
*.dxf , single layer preferred |
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Gerber |
RS274X 2.4, absolute,imperial,leading zeros = none ,ensure origin fixed near edge. |
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Drill |
Excellon Ver 2,ASCII txt ,2.4, absolute,imperial, leading zeros = none |
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Documentation |
Word *.doc , PDF *.pdf |
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Rout Detail |
Place on Mech 2 layer 2mm track ,ensure vertices coincident |
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Crop detail |
10 thou with track x 100 thou long angle at each corner , cut to be to outside of angle |
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Polygon Fills |
Using 1mil track/1mil grid makes huge files, 10/10 fine for most jobs |
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Solder Mask |
Solder mask expansion 6 thou typical on pads, 3 on tight components. |
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Drill Info |
Drill sizes (0.5mm - 5.0mm) step 0.1mm larger holes routed |
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Drill Nos |
keep drill changes low as possible 4-5 ok 11 more expensive |
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Legends/Overlays |
Top or bottom Overlays min track widths 8 thou ,off pads and exposed solder |
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Tracks/Spacing |
Track width min 8 thou, track spacing 8 thou for maximum yield |
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Annular ring size |
Min + 18 thou on drill diameter for thru hole components |
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Orientation text |
Right Reading reference text on each layer recommended |
Huntsbury Circuits
