72 lines
3.1 KiB
HTML
72 lines
3.1 KiB
HTML
<html>
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<!-- This file is used to autogenerate a *.h file, but you can load it into a browser to preview -->
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<h1>Freerouter Guidelines:</h1>
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<ol>
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<li> in pcbnew, using the Layers Setup dialog:</li><br>
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<li>choose the number of layers, and enter the name of each layer.</li><br><br>
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These should look something like this (if a 6 layer board):
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<ul>
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<li>Front - signal</li>
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<li>Ground - power</li>
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<li>H1_Signal - signal</li>
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<li>V2_Signal - signal</li>
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<li>Power - power</li>
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<li>Back - signal</li>
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</ul><br>
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Notice that after the layer name there is a layer type field, either 'signal' or 'power', typically.
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Any layer identified as 'power' will be removed from the layer menu in Freerouter,
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as this will be assumed to contain a power zone.
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</li><br><br>
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<li> in pcbnew: establish board perimeter.</li><br>
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<li> in pcbnew: load in the netlist so you have all the components defined and instantiated.</li><br>
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<li> in pcbnew: establish any zones, inclusive of net association.</li><br>
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<li> in pcbnew: do the degree of component placements you are comfortable with.
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It is a little easier to accurately position components in pcbnew than in
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freerouter, but either will work.</li><br>
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<li> in pcbnew: set up the netclasses. Power traces might be a little thicker
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than signal traces. If so, add a netclass called 'power'.
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Make its traces thicker than what you establish for netclass 'Default'.
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Set trace width, spacing and vias for each netclass.</li><br>
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<li> in pcbnew: export to DSN.</li><br>
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<li> load up freerouter (keep it running for any subsequent iterations of 5) through 16) here).</li><br>
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<li> in freerouter: load the project's *.dsn file. Immediately after a load, all
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components and traces (if any) will initially be 'fixed'. This is a 'lock
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in place' toggle that you can undo by selecting a region with your mouse
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and then selecting 'Unfix' from the menu. Occassionally you may want to
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re-fix a trace or a part, if only temporarily. This keeps it locked in
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place.
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</li><br>
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<li> useful, not mandatory: in freerouter: set your move snap modulus, which seems
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to default to 1 internal unit.
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20 mils in x and in y is about reasonable.</li><br>
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<li> in freerouter: finish placing any components, you can change sides of a part
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here also, rotate, whatever.</li><br>
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<li> in freerouter: route the board, and save frequently to a *.dsn file while
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routing in case of power loss. Pick the menu option for saving a full *.dsn
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file, not a session file (yet). The full freerouter *.dsn file is a superset
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format, one that can be reloaded in the event of a power loss. Whereas the
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*.ses file is not a complete design, but only with the *.brd file
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constitutes a full design. So it is important to backup your work to a
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*.dsn file while routing in case of power loss.</li><br>
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<li> in freerouter: when done, or when you want to back import, then save as a session file, *.ses.</li><br>
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<li> in pcbnew: backimport the session file</li><br>
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<li> in pcbnew: at this point the zones have to be refilled. One way to do that
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is to simply run DRC.</li>
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</ol>
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</html>
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