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standard footprints

Discussion in 'Electronic Basics' started by James, Aug 4, 2004.

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  1. James

    James Guest

    I'm hoping someone can give a noob some direction here. I've started
    designing a pcb using electronics workbench and am a bit confused on how to
    get past where I am.

    I'm trying to create a component for a lumberg part (2415_01, 1502_01 and
    2410_01) which are upright (vertical) usb, IEEE1394 and 2.5mm jack
    connectors. When creating a new component it gives me a option of choosing a
    standard footprint. I can't find a listing of these and I find one that
    works with this. I also can't see where to create a new footprint.

    Any help is GREATLY appreciated :)

    Thanks,
     
  2. Active8

    Active8 Guest

    Return it for full refund. That would be a good start.
    It's probably easiest to grap a jack footprint and save it under a
    new part name in a library of your own where a reinstall won't wipe
    it out and then edit it.

    Something tells me you're not going to find many EWB users around. I
    might remember one user who didn't bad mouth EWB, but he's probably
    commited suicide by now.
     
  3. James

    James Guest

    Thanks for the feedback - I also have access to powerpcb - is that much
    better?

    There are two things I need in a pcb design package - easy ability to
    create custom decals/footprints as I am using some very specific parts
    and secondly I need to overlay a CAD drawing of the board as I need to
    be VERY specific in the layout of the components. Its a double sided
    board so two cad drawings would be perfect.

    Products like Eagle just don't suppor this sort of thing (that I've
    foudn so far)

    Any thoughts on what I should be using?
     
  4. Active8

    Active8 Guest

    Dunno. I'm spoiled.
    You might get away with Orcad (cadence) Layout. You can get a
    student version and I don't think the limitations will hurt you. I
    don't recall the Layout limitations.

    The overlay you refer to is know as the silkscreen layer. You can
    also do an outline layer and create custom layers.

    Terry Pinnel has a page on CAD programs you should check. If he
    doesn't chime in soon, I think the URL is something like

    www.terrypin.dial.pipex.co.uk and part of that googled ought to
    return the URL if I'm wrong.
     
  5. James

    James Guest

    I also need the silkscreen layer but that's separate. I was referring to
    the outline layer. The problem is most entry level progs don't let you
    import files for the layers.

    Other progs don't let you specify the location of the components
    precisely outside of the 2.54mm grid.
    Terry: Where are you buddy! Help me ! LOL
     
  6. R Adsett

    R Adsett Guest

    Eagle will let you do most of that out of the box (so to speak). It does
    do custom footprints (and various silkscreen layers). I found it easy to
    create a new package. Weakness on new package layouts, circular holes
    only for through hole (If you need a slot you have to build it up).
    There are probably other weakness but for straightforward double sided
    boards I doubt you will notice.

    As far as CAD overlay. There is support in Eagle to allow it but how
    easy it is to do I don't know. Check out the DXF importing utilities on
    their website (they also have support newsgroups). I think it should be
    possible to import a dxf into an unused layer and use that as a guide,
    but I haven't done it. Ask in their support newsgroups someone may have
    done it.
    Again check for DXF import utilities on Cadsofts support area. There
    is/are some image import utility/ies as well but I didn't much care for
    the result lasr time I tried.
    I've not had a problem with placing on as fine a grid as is unreasonable.
    (and in fact you can also position using absolute coordinates from the
    keyboard, very useful when trying to match existing mechanicals)

    Robert
     
  7. R.Lewis

    R.Lewis Guest

    What you are looking for is any package that imports DXF's (or DWG's).
    Do mechanical in mechanical, electriconic in electronic.

    Import you board outline, slots, and other sundry non electronic component
    pcb holes etc.,from a mech. cad package (Autocad or a clone) as one layer.
    Do your 'tronic work on other layers - however many you need.

    Lots of cad packages do this. They are not expensive.
    See Terry Pinnells website for a mega list of 'tronic cad and download some
    demo's.
    EasyPC will do all you need here for about $160 but there are loads more.
    Do not spend a fortune on an 'all singing all dancing' package if you are
    not going to use it regularly - you will spend hours, days, weeks, every
    time just trying to figure out how to do something in some of the more
    complex packages such as Cadstar, Pads etc.
    If you use them very regularly they are good otherwise they are worse than
    hopeless.
     
  8. James

    James Guest

    What you are looking for is any package that imports DXF's (or DWG's).
    I know - thats what I asked about ;)
    Everything is done in cad - solidworks actually as that's what I have
    access to. My problem is the ecad part
     
  9. Leon Heller

    Leon Heller Guest

    Pulsonix allows DXF files to be imported into PCBs and PCBs can be exported
    as DXFs:

    http://www.pulsonix.com

    Footprints are very easy to create.

    Leon
     
  10. Active8

    Active8 Guest

    2 ens and 2 els, but I think I had his home page right. Should find
    links there, but ECADEList.html or htm looks right.
    <snip>
     
  11. R.Lewis

    R.Lewis Guest

    As I said b4:
    In solidworks determine the pcb outline (including any non electronic
    components slots, holes, etc) then just export it to the e-cad package as a
    dxf.
    This is your board ouline layer which you never need touch - just leave it
    all alone on its own layer and do the other e-cad on other layers.
    Loads of e-cads import dxf's and solidworks exports them.
     
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