search

buixuanan / fritzing

Automatically exported from code.google.com/p/fritzing
0 stars 0 forks source link

Trace width is limited to 128 mil #2912

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Is there a good reason for limiting trace width to 128 mil?

According to standard trace width calculators, 128 mil limits you to about 5A 
constant with a 10 degree rise, 7A if you can tolerate a 20 degree rise.

http://circuitcalculator.com/wordpress/2006/01/31/pcb-trace-width-calculator/

Original issue reported on code.google.com by bitsybof...@gmail.com on 1 Feb 2014 at 11:07

GoogleCodeExporter commented 9 years ago 
The limitation seems to be only in the "width" box of the user interface. A 
priori, nothing in Fritzing should prevent you from going to 32767 mil.

Original comment by david.pe...@gmail.com on 1 Feb 2014 at 12:48

GoogleCodeExporter commented 9 years ago 
I tried changing the max trace width (line 36 of tracewire.cpp), but I found at 
least one problem. In the file attached you can see that the tracks sometimes 
end a little bit before the pad. This bug doesn't matter before 128 mil, but it 
begins to matter at 1000 mil.

As a workaround for now, you can unzip the .fzz file, open the .fz file in a 
text editor and modify the line "<wireExtras mils="1000"" to something you like.

Original comment by david.pe...@gmail.com on 1 Feb 2014 at 2:05

Attachments:

GoogleCodeExporter commented 9 years ago 
Issue has moved to new issue tracker at github. Please continue the discussion 
at https://github.com/fritzing/fritzing-app/issues

Original comment by andre.knoerig@gmail.com on 23 Sep 2014 at 3:44