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Thermals on isolated vias

autodeskguest

Can anyone tell me how to apply thermals to isolated vias connecting ground

planes?  I don't want to turn on "Generate thermals for vias" option in the

DRC.  Thanks.

 

 

 

 

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  • "Grzegorz Zalot" <complex@alpha.pl> schrieb im Newsbeitrag

    news:g2l6bc$qe4$1@cheetah.cadsoft.de...

    Hello Leo B !:

    Can anyone tell me how to apply thermals to isolated vias connecting

    ground planes?

     

    You can use some restricts and ignore some errors. Unfortunately all wires

    you should create manually. With small clearance you can use some arcs in

    restrict layer.

     

    Really the option "thermals" for polygons is quite stupid because the

    general option for vias overwerites it ... only pads are affected.

     

    I don't want to turn on "Generate thermals for vias" option in the

    DRC.

     

    Why ????? This is IMHO best way to create good boards.

     

    regards

    --

    Grzegorz Zalot

     

    Why argue with it? The user has the control. It should be possible to set

    the VIA characteristics in a way that it 1. disables thermal generation

    regardless of other settings, 2. enables them regardless of other settings,

    and 3. enables or disables them according to "Global Design Rules" (note,

    NOT the DRC). Another nice example for this is the STOP flag (see "Re: STOP

    flag, vias with and without stop mask" in eagle.betatest) - same "ON -

    AUTO - OFF" scheme here. Once more: if at all, such modifications need to be

    controlled by "Global Design Rules", not by the "Design Rule Check". It's

    about time to fix this terrible conceptual flaw!!

     

    T.

     

     

     

Reply

  • "Grzegorz Zalot" <complex@alpha.pl> schrieb im Newsbeitrag

    news:g2l6bc$qe4$1@cheetah.cadsoft.de...

    Hello Leo B !:

    Can anyone tell me how to apply thermals to isolated vias connecting

    ground planes?

     

    You can use some restricts and ignore some errors. Unfortunately all wires

    you should create manually. With small clearance you can use some arcs in

    restrict layer.

     

    Really the option "thermals" for polygons is quite stupid because the

    general option for vias overwerites it ... only pads are affected.

     

    I don't want to turn on "Generate thermals for vias" option in the

    DRC.

     

    Why ????? This is IMHO best way to create good boards.

     

    regards

    --

    Grzegorz Zalot

     

    Why argue with it? The user has the control. It should be possible to set

    the VIA characteristics in a way that it 1. disables thermal generation

    regardless of other settings, 2. enables them regardless of other settings,

    and 3. enables or disables them according to "Global Design Rules" (note,

    NOT the DRC). Another nice example for this is the STOP flag (see "Re: STOP

    flag, vias with and without stop mask" in eagle.betatest) - same "ON -

    AUTO - OFF" scheme here. Once more: if at all, such modifications need to be

    controlled by "Global Design Rules", not by the "Design Rule Check". It's

    about time to fix this terrible conceptual flaw!!

     

    T.

     

     

     

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