Re: gEDA-user: How do you unmask via's in PCB?

[Bob Paddock <bpaddock@csonline.net>]

Is there a command that will only selected vias of a certain size?

50% of my vias are 35 mil holes, the other 50% are 28 mil holes, and they
are all intermixed so "select all" is not all that useful?

On Saturday 29 May 2004 02:17 pm, Dan McMahill wrote:

> On Sat, May 29, 2004 at 01:19:06PM -0400, Bob Paddock wrote:
> > How do I had solder mask clearance to selected via's?
> > I tried selecting them then doing "ChangeClearSize(selected,+3,mil)" but
> > nothing happened.  That command only seems to work on pins&pads.
>
> 1)  Make sure you have the soldermask visible when you invoke that action.
>     Otherwise you'll change the clearance to copper not soldermask relief.
>
> 2)  The value you put in determines the radius of the circular soldermask
>     relief.  So for example if your via copper diameter is 40 mils, this is
>     a copper radius of 20 mils.  To have a 5 mil soldermask relief around
> the via, specify a 20 + 5 = 25 mil value for the soldermask.  So
>
>     :ChangeClearSize(selected,25,mil) should produce the right result.
>
> The syntax of "+3" means increment the current soldermask relief radius by
> 3 mils while the "25" syntax means set the radius to an absolute value of
> 25 mils.
>
> Now, it does seem that it would be more desirable to have "+3" mean "make
> the soldermask relief 3 mils larger than the pad size", but thats not what
> it does currently.
>
> -Dan

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