[PCB_FORUM] Re: Why would auto router create L-L DRCs?
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Wed, 21 Dec 2005 16:58:27 -0800
The specctra router "Allegro Router" is a conflict reduction router.
I actually love the way it works, compare to other routers in the
market, the conflict reduction feature is the best feature of it.
Let say you have a board fully routed, then you are asked to move a
large pin count IC, you could just move it to the new locations, have
many DRC as a result of the moved component; put the board back on the
router, and it will clean up the DRC's for you, see if you can find
alternate router that can do that for you.
Regards,
Patrick Jabbaz
Sr. Board Design Eng.
Xilinx
2100 Logic Drive
Building1, Floor2
San Jose, CA, 95124
W: (408) 879-4709
M: (408) 621-6533
-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Gene Carman
Sent: Wednesday, December 21, 2005 3:04 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Why would auto router create L-L DRCs?
This is pretty fundamental... as a designer you wouldn't cross two
different nets with a short and expect to "get away with it." Why is the
autorouter making this choice. The constraint is set, yet the
autorouter is violating it. Very odd.
CONSTRAINT: Line to Line Spacing
CONSTRAINT SET: DEFAULT
CONSTRAINT TYPE: NET SPACING CONSTRAINTS
Constraint value: 4 MIL
Actual value: 0 MIL
BTW I am selectively autorouting nets by selection.
But the whole issue to me is that the autorouter is making shorts, and
that just does not make sense.
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