Purpose

A Python library for writing Gerber files.

• The API is much simpler than the Gerber format specification - 8 pages vs 200.

• No need to read the 200 page Gerber format specification.

• All common pad shapes are built-in.

• User-defined pads shapes are easily created.

• 100% compliance with revision 2023.08 of the Gerber Layer Format Specification.

• Conservative, robust output files.

• Risky constructs failing in some buggy applications are avoided.

• Standardized meta information for fabrication, such as which pads are vias.

• Input parameters are checked for compliance with the Gerber spec.

• Stateless input (the gerber_writer takes care of the Gerber states).

Example:

from gerber_writer import DataLayer, Circle, RoundedRectangle

trace_width = 0.127
via_pad = Circle(0.508, 'ViaPad')
IC17_toe = RoundedRectangle(1.257, 2.286, 0.254, 'SMDPad,CuDef')
toe_point = (0, 2.54)
via_point = (5.08, 0)

top = DataLayer('Copper,L1,Top,Signal')

top.add_pad(IC17_toe, toe_point, angle=45)
top.add_trace_line(toe_point, (2.54, 0), trace_width, 'Conductor')
top.add_trace_line((2.54, 0), via_point, trace_width, 'Conductor')
top.add_pad(via_pad, via_point)

with open('gerbers\gerber_writer_example_small.gbr', 'w') as outfile:
top.dump_gerber(outfile)

Installation

Windows:

$ py -m pip install gerber_writer

Linux:

$ python3 -m pip install gerber_writer

Requirements

• Python 3.9 or higher

• Standard library only.

• OS independent.

License

Apache 2.0 license

Contact

karel_tavernier@hotmail.com