machine gerber file
Hi!!!
Gerber file contains instruction for numerical command machine to plot a mask for your PCB.
There is 2 parts : the aperture definition, and the instructions.
The aperture definition describe the different tool (or pencil) use to draw your PCB.
It comes back from the old time when there was a turret on the machine, populated with the different tool used for a design.
For example if the trace width on your pcb is 12th, there will be a aperture definition for a round shaped pencil of 12th diameter. There is also a definition for the pads.
The second part describe the board itself.
It is coded command like :
take the 1st pencil
draw a line
take the 2nd pencil
draw... etc
for gerber 274X format, the 2 part arre in the same file
for gerber 274D format, there are 2 files, one for the definitino of the tool, one for the instructions.
Here are some usefull link :
**broken link removed**
Gerber description
For a PCB, there is also 2 others files : the drill description, and the board mechanical description. the language used are quite the same...
Hopes it helps you...
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