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Allegro PCB --> Export Placement ????

split63

I have a two sided PCB and the goal is to generate two placement files; one for the top, and one for the bottom.

How is this accomplished?

Currently if I run File --> Export --> Placement, it generates one file with the top and bottom components mixed together in one file.  Also the bottom side coordinates appear to be relative to the top origin looking through the board.

Tools --> Reports -->Component report  seems to generate the same mixed result.

  • The Component Report template is in the installation at share\pcb\text\views\cmp_rep.txt, you will need two copies of this, in copy1 (for the TOP), change the SYM_MIRROR entry to SYM_MIRROR="FALSE", and save this modified template, in copy2 (for the BOTTOM), change the SYM_MIRROR entry to SYM_MIRROR="TRUE", and save this modified template. The default report path will include the current directory, but this might have been changed, assuming the default is still set, save these report templates to the board directory and they will appear at the bottom of the Tools>Reports list for selection. If you want to "mirror" the part locations to be "as viewed from the bottom", you will need to post process the locations, probably just changing the sign for X, or Y, or both, values will get what you need.

  • I copied the files and made the changes as described.  The two files did show up in the report window.  When I run them, the report file has a header, but no data.

    Here is the contents of the file:

    #
    # Property of Cadence Design Systems, Inc.  All rights reserved.
    #
    # $Header: cmp_rep_view.txt.v 1.1 12/01/87 ddd Prealpha
    #
    # File: cmp_rep_view.txt - Component data extract cmd file for
    #                component list report
    #
    # Revision history:
    #    (0.10) ddd 12/01/87    Preliminary initial version
    #
    #
    COMPONENT
    #
    # Extract: refdes(sort), refdes, device_type, value, tolerance,
    #       package, x, y, angle, mirror.
    #
    REFDES_SORT
    REFDES
    COMP_DEVICE_TYPE
    COMP_VALUE
    COMP_TOL
    COMP_PACKAGE
    SYM_X
    SYM_Y
    SYM_ROTATE
    SYM_MIRROR="TRUE"
    #
    # end of cmp_rep_view
    #

    What does SYM_MIRROR do?

  • Try SYM_MIRROR="YES" and SYM_MIRROR="NO" instead.

  • Yes, that did the trick.  Thanks so much

    I have no idea how to do the post processing on the output.   I suppose I could pump into excel and see how much damage I can do.

    I suspect the Contract Manufacturer will want the placement coordinates from the perspective of each side.

  • There is a set of extract files we use available from http://www.aiscorp.com/en/index.php/support/cadence-scripts  I don't remember which one of the two downloads we use, but the resulting file is what our manufacturing facility uses for their pick-n-place machines.  Never have to do any post-processing on my end other than run the script.

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