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Changing spacing constraints when opening Allegro

Mstrghettorigg

Hi All,

 I was wondering if anyone can guide me in the right direction.

I'm trying to make it so I can set the bottom SMD pin to TH distance when allegro starts up.  This will need to be done to all files being opened.

I'm not familiar with writing skills, but I was wondering if anyone has ran into similar Skill file or at least guide me in the right direction.

I looked through some forum and it looks like I can use axlCmdRegister and axlTriggerSet commands to run the skill automatically once I have the skill file create.

I think this command is where I need to get started from, but I don't think it's that simple. 

axlCNSSetSpacing("" TOP 'Thru Pin_SMD Pin .050 INCH) 

Any help will be appreciated.

Thanks! 

  • The Skill Language User Guide is a good start (...doc\sklanguser\sklanguser.pdf)

  • You should read the APLICATIION NOTES section of axlTriggerSet. With your example, you are ignoring the recommendation to block your form. To enable a blocking form change the following create form line to:

       myform=axlFormCreate( (gensym) form_file nil 'Form_Action nil)

    and add after axlFormDisplay(myform) a call to:

        axlUIWBlock(myform)

    You may also want to reconsider your use model. A more flexible model would either start a new design from a template board or have a techfile loaded on a new design start. If you worry about accidental changes to the rules, you can either lock the constraints via the techfile or make doing a techfile compare (board to a master techfile file) part of your design release process.

  • Hi fxffxf,

    Thank you for your input.  I will take a look at the document and try out the suggestions.

    Our intention is to use it on new design and also on an old designs that will need to impliment these spacing constraints on new revisions.  The spacing was suggested fairly recently so all of our previous design will need to be changed if it's possible to change it.

    It's still something I am just looking into and any input will be appreciated. 

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