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Changing Vcc symbol net name in schematic removes the "airwire" in PCB

3 Feb 2012

timhoeppner

Canada

Hello,

 

First off I love DesignSpark, it has been an absolute joy to use for the most part. I've run into a bit of a snag though. For a particular design I'm working on I need to have multiple Vcc and Vss supply rails so I put down the Vcc symbol and renamed the net name to VCC_1 from VCC. When connecting pins to the new net name when I move to the PCB the airwire doesn't show up but I know the connection is there because the auto-router will make the connection. Please advise.

 

I'm using DesignSpark v3.0

 

Tim

Antworten

timhoeppner

Canada
vor 15 Wochen

When I attempt to reproduce the issue I can't... It has happened to me on a few occasions and I have always verified the connection exists in the PCB but it won't draw the air-wire. I believe there is a bug somewhere there which could cause issues possible although I forgot to run a DRC to see if there was any unconnected nets. Anyways it seems deleting all the components on that net and re-creating them solves the issue.

MikeBK

United Kingdom
vor 15 Wochen

Hi Tim, are you using 'forward design changes' to translate the schamtic changes you have made to the PCB? Make sure you are displaying net names on your schematics (right click on a track, select 'display net name') rather than Vcc symbol names. I caught myself on thinking I connect a IC pin to say 5V because the Vcc symbol shows the name 5V, but the actual net is N01234. I learned to always display net names everywhere on schematics, this prevents from any unintentional net name changes and you are really able to see what is going on.

timhoeppner

Canada
vor 15 Wochen

Hello,

Thank you for your reply. Yes I have forwarded design changes and am displaying the net name. I can verify the connection and net names are correct by highlighting the nets and viewing the text when forwarding the design changes. I also verified the connection is correct by running the auto-router in the PCB which successfully connects the pins however I never see the "airwire" when I want to manually route the net which is what I want to do.