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How to handle "unconnected pins" when they are apparently connected throught copper tracks?

EuSV

I have done a translation from old project to 16.6 orcad version. I have followed the whole of files traslation steps, importation, configurations, etc until I had no errors. I generated netlist and update the board layout. So looking to the pcb editor canvas it can be seen that there are some rastnets between pins that are connected because they have tracks connections. I followed the tracks, vias, etc path and there are electrical path. So I don't know how to solve this.

example: 

So I generated the unconnected pin report and this says that there is unconnected some of them, including the one seen at picture. I check the track names and all the segments forming the track path has the same net name. 

How can I deal with this? How can I do for looking the part that is not connected? can it be an interface mistake? I'm sure that the two pins has connection has a continuous track connection. 

Parents

  • So some other CAD packages don't care about pin origins whereas the Cadence PCB Tools do and the tracks do not connect to the origins of the pads. Try running Tools - Derive Connectivity, enable some pf the options and see if that helps, if it doesn't try some of the other options.

  • in reply to steve

    My old project was created with an old version of Cadence/Orcad. I'm new with it, and now I'm trying to repaint these tracks. I deleted the tracks (supposedly unconnected ones) and I'm trying to paint the same tracks but it's impossible with Allegro's. I don't know what happens I can't believe it would be so problematic. I click on "add connect" icon and then I click first pad and then second point. But I can't modify the path that CAD is forcing, it paints the track where it wants, making contact with other tracks belonging to other nets, making a mess. Why I'm not able to paint the track by the way that I want?

     This is taking 2 days of work for me and I have not done any track/net change yet. I don't know what I can do. 

    Thanks steve.

Reply
  • in reply to steve

    My old project was created with an old version of Cadence/Orcad. I'm new with it, and now I'm trying to repaint these tracks. I deleted the tracks (supposedly unconnected ones) and I'm trying to paint the same tracks but it's impossible with Allegro's. I don't know what happens I can't believe it would be so problematic. I click on "add connect" icon and then I click first pad and then second point. But I can't modify the path that CAD is forcing, it paints the track where it wants, making contact with other tracks belonging to other nets, making a mess. Why I'm not able to paint the track by the way that I want?

     This is taking 2 days of work for me and I have not done any track/net change yet. I don't know what I can do. 

    Thanks steve.

Children
  • in reply to EuSV

    Check the Options Pane once you have selected Route - Connect, there is a Bubble mode, if this is set to None then you can create DRC errors, try Shove Preferred (to shove other objects out of the way) or Hug Only to Hug items, Check your Grid settings under Setup - Grids to make sure that the Etch Grids are realistic, you can also (once you have selected a ratnest) right click - and uncheck Enhanced Pad Entry which might give you more control about where the route is going, sometimes if you are routing to a pin this controls how a route enters the pin without making manufacturing issues.

  • in reply to steve

    what is route - connect in options panel? I don't see that. I'm working with 16.6 version.

    Thanks!

  • in reply to EuSV

    The Menu Route > Connect then look at the Options fold out pane on the hand side of the screen (in 16.6 hover over the Options fold put panel). 

  • in reply to steve

    I have just realyzed what is happening there. I need help for solving this. Maybe you can say something useful, once again :). 

    Tracks are making rare things because they are trying go from top track to bottom pads. But... how can it be possible that they are trying doing that way if my target symbols pads are on the TOP?

    Well, this pcb design has same components on the top and on the bottom. Designer make them to be at the same coordinates. OK. So, bottom and top pads are often forming a pair pads stack from my point of view (or from this CAD point view), hence, if I throw a track segment from another one to my top symbol, CAD is prioritizing bottom pad target. So it is starting a conflict issue and program stops execution.

    I reviewed my active class, also visibility. I have the etch top only activated at options tab and only top layer visible. 

    How can the bottom symbols still visible and active? I can see how bottom tracks and bottom vias are turned off, but not happening with bottom symbols. Is it normal? how can I turn off bottom objects (symbols, symbol pads, etc)?

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