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Autodesk EAGLE
EAGLE User Support (English) Manual trace bottom track across bottom polygon: how to?
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Related

Manual trace bottom track across bottom polygon: how to?

earckens
earckens 6 months ago

I need to get a bottom trace between two via's that currently are connected with an airwire.

However, when doing the trace at the bottom, the polygon does not cede to make way for that trace.

Using Eagle v7.6.0

How to solve?

image

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Top Replies

  • earckens
    earckens 6 months ago in reply to shabaz +1
    I got it solved: 1. from the upper right via a bottom trace to the lower left connecting track, and connect. It will then show a large yellow cross across that connection, solve it with placing a via…
  • shabaz
    shabaz 6 months ago in reply to earckens +1
    You can improve this significantly. You may say " Eagle, for me, does what I want it to do" but I think you're ignoring modern features and relying on the pretty rotten auto-router, and I can imagine the…
  • geralds
    geralds 6 months ago in reply to shabaz +1
    Hi shabaz ! Yes, many users strictly ignore modern functions. Fusion 360 (Eagle 9.6.0 on the web) has a 3D function, has a "modern" autor-outer, but ... so far, I like manual routing - it's a training…
  • shabaz
    0 shabaz 6 months ago in reply to geralds

    Hi Gerald,

    I'm the same, I prefer manual routing; I meant that modern features for guided routing in KiCad are better than the poor auto-router in EAGLE. I don't mean auto-router is better than manual routing (at least, not for the complexity of boards one would be using these particular tools for).

    I've not seen what improvements KiCad 9 has made (I don't think they have the rubber-banding feature you mention). In v8, there's a kind of slight approximation, which is the auto-complete. It allows you to move a part, and all connections will turn to air-wires as you mention; however, if you then press Shift-F (with the component highlighted), it will try to auto-fix the connections, i.e. the end result of a rubber-banding sort of operation. Here's a video of it, where I moved a part, and then deleted the traces that I didn't like to remain, and then selected the component and pressed Shift-F. Not as smooth as rubber-banding of course. You can see it missed one trace, but that's easy to fix, by clicking on that trace and pressing Shift-F again.

    Personally I don't use this tool in this way (I sometimes use it per track, using just the 'F' key). For general routing, I usually have KiCad set to the 'walk around' mode, and find that very useful minimal guidance while routing (but the other options are very useful too).

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    The EAGLE imports of libraries is already excellent in v8, however since EAGLE had issues with slotted pads and shaped pads, it is beneficial to either try to clean up those specific footprints, or to recreate them, using the direct KiCad support for those features.

    But it would be wise to retain old EAGLE for old projects for sure (even though, again, KiCad support of EAGLE project import is pretty good too).

    Personally, I've over time just redone the footprints that I wanted to use, rather than use the EAGLE version (however, I have still imported the EAGLE footprints, so I can easily compare, to reduce the risk of error).

    Regarding the 3D models, I now try to always have a 3D model for each new component I add, simply because I've found it reduces errors so much, in two ways:

    (1) The obvious way, which is that you can easily see if there are clashes between parts on the board, and optimize the position of parts on board edges, etc.

    (2) Not-so-obvious (at least not initially to me!) - it greatly reduces the risk of error in the PCB footprint creation process in the first place, because, if your 3D model doesn't match the pads and outline, then it's immediately clear there is an error in the footprint or the model! This has been immensely useful, because often some dimensions may be vague or missing in the drawings in the datasheets, or I may have introduced some accidental error. The 3D model lets me instantly get a decent amount of additional confidence that the footprint is good.

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