“No forward-/backannotation will be performed!” is the curse of my day.
I played with the schematic, and reviewed / addressed some of the error tool warnings, and somehow this error went away!
At the dorkbot meeting one guy told me that when he gets the error its because there is a missmatch between the PCB and the schematic, and that the way to fix it was to nuke the PCB and auto generate a new one from the schematic. I don’t kow what I did to get around the issue but I’m happy its behind me now.
Thicker lines for current signals:
My current issue is now how to rout thicker signals for the 4A max current load from the H-bridge. I don’t yet know how thick the lines need to be to carry 4 amps. I do know that my current board that uses as large of line i could fit fails the default board rule checks and I need to rip up those lines and redo them.
After some playing around I found the rip up tool and a dialog box for setting the min line width. These allowed me to rip up the low current lines and re-auto rout new lines (thicker) where I needed. Doing this a few times allowed me to get the lines I need for the H-bridge output.
Work in progress:
My schematic and board layout can be seen at eagle.tar.bz2
I keep updating it so check back every once in a while.
Board Fabs for stuff like this:
Monty recommends www.4pcb.com for its first time user discount and they do good work for his bittybot
I know that www.sunstone.com, www.pcbexpress.com, are options and I’m still shopping around.