Eagle (7.7.0) had me in a corner yesterday, couldn't work out why the auto
router wouldn't connect power and ground to a TQFP package, it showed air
wires for the omitted connections.
After some playing with the device, gnd@1, gnd@2, append, any/all etc. it
dawned on me that if air wires were being drawn, the device and schematic
must be OK, it has be something board related causing the problem
It was, 20mil default track width good, 40mil power tracks bad, too wide
for TQFP pins.
My solution, auto route with 40mil power, then change to 20mil power and
run the auto router again, works a treat, if not very elegant.
My question, is there a correct/better way to change a track's net class to
achieve this?
Ken
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