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Re: Silk screen line width behavior.


On 11/10/2010 2:11 AM, jean-pierre charras wrote:
> Le 09/11/2010 22:30, Wayne Stambaugh a écrit :
>> On 11/9/2010 4:11 PM, Dick Hollenbeck wrote:
>>> On 11/09/2010 02:35 PM, Wayne Stambaugh wrote:
>>>> I just got DFM failure from my PCB manufacture for silk screen width of 0.001"
>>>> for all the silk screen drawings on a board I just laid out.  I checked all of
>>>> the module silk screen widths and everything is 0.005" or larger.  A quick
>>>> check of the silk screen layer gerber file revealed the aperture being used
>>>> was
>>>> indeed 0.001".  After some digging around, I found that changing the "Default
>>>> pen size" in the plot dialog changed the silk screen line width.  Is this the
>>>> appropriate behavior?  Setting the default line width to 0 did not fall
>>>> back to
>>>> the line width defined in the module.  I would expect my silk screen line
>>>> widths to be what I defined them in my module not the default pen size
>>>> setting.
>>>>   At one time, I thought this was the default behavior.  Before I file a bug
>>>> report, I wanted to make sure I'm not missing something.  Anyone else have any
>>>> thoughts on this?
>>>> Wayne
>>> Its not perfectly pertinent to your question, but I have found
>>> /scripts/setfont.sh
>>> to be useful after I have a board ready to plot.
>>> I have not stumbled onto your problem before.  Maybe something has
>>> changed, or I just missed it.
>> I haven't laid out a board with the latest stable version so I can't say for
>> sure but I don't remember having this problem with the previous stable version.
>>> > From a UI perspective, I would not prefer to have to set the default
>>> width to zero to say, "leave me alone".
>>> I would prefer to select a checkbox saying override the line-widths, or NOT.
>> A check box would be preferable.  Setting the line width to 0 is less than
>> obvious to the user.  Currently, setting the line width to 0 will set the
>> aperture to 0 which in itself might be consider a bug.  I confirmed this with
>> BZR 2595.
>> Wayne
>>> Dick
> Default pen size is used *only* to plot items that have no line width specified.
> Namely:
>     sheet references (if asked, not usual in gerber files)
>     and pads in sketch mode on silk screen.
> Silk screen layers are the 2 layers that do not use filled shapes to show pads,
> when they are put on these layers.
> So they use the default pen to plot pads.
> Other items must be drawn with their own line width, regardless the default pen
> size.
> An other behavior is a bug.
> So no need to have a check box.
> I am unable to reproduce your problem on my boards (just pads on silkscreen
> layers use the default pen).

Duh!  My bad.  It was silk screen on pads from a footprint that I imported.
Thanks for the input.