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Precision |
Some drawing entities don't have an equivalent in the other supported formats. LinkCAD converts such entities to polylines. This setting allows you to control the precision of this conversion. Either specify an absolute tolerance value or a fix the number of polygon vertices per full circle. Setting an absolute tolerance value is preferred because it dynamically adapts the polygon complexity according to the object size. Use a large precision value to limit the size of the polygons. |
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Load external aperture file |
Check this option to enable auto-loading of Protel aperture files (.APT). LinkCAD searches for the aperture file in the same directory as the loaded Gerber file. |
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Apply layer polarities |
If checked, clear-field data is subtracted from dark-field data. If unchecked, clear-field and dark-field data is placed on separate layers. |
You don't usually have to set the following options for
RS-274X files because they are
normally stored inside the Gerber file and override these defaults.
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Gerber units |
These options define the coordinate format of the Gerber data. |
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Coordinate format |
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Zero suppression |
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Coordinate mode |
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Circular interpolation |
Defines the default mode for circular interpolation. The Gerber file may override this setting. Most files use a default of 90° interpolation. |
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Modal flash command (D03) |
Most Gerber files assume that the flash command (D03) does not have to be repeated, but remains active until another command is encountered. Otherwise uncheck this option. |
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Modal circular interpolation (G02/G03) |
Most Gerber files assume that interpolation modes remain in effect until a different mode is encountered. Otherwise uncheck this option. |