gEDA-user: Fiducial

[Jeff VR]

 >Is you soldermask clear enough?
I'm not sure. I haven't ordered my boards yet. My assembler requires the 
fiducial to not have the soldermask so the vision equipment is sure to 
get an accurate reading.

 >Does this need to be a feature?
I'm not an expert in PCB layout tools but given the importance of a good 
fiducial it seems worthy of some development time.

Thanks,
Jeff

John Griessen wrote:
> I just tried making a rectangle of solder mask -- that's out.
>
> Jeff VR wrote:
> is their a way to get PCB to
>> not put paste on a pad so I can go back to having a fiducial on one
>> side of the board?
>
>
> This is in the manual:
>
> Pad [rX1 rY1 rX2 rY2 Thickness Clearance Mask "Name" "Number" SFlags]
> Pad (rX1 rY1 rX2 rY2 Thickness Clearance Mask "Name" "Number" NFlags)
> Pad (aX1 aY1 aX2 aY2 Thickness "Name" "Number" NFlags)
> Pad (aX1 aY1 aX2 aY2 Thickness "Name" NFlags)
>  ©
> rX1 rY1 rX2 rY2
> Coordinates of the endpoints of the pad, relative to the element’s 
> mark. Note
> that the copper extends beyond these coordinates by half the 
> thickness. To
> make a square or round pad, specify the same coordinate twice.
> aX1 aY1 aX2 aY2
> Same, but absolute coordinates of the endpoints of the pad.
> Thickness width of the pad.
> Clearance add to thickness to get clearance width.
> Mask width of solder mask opening.
> Name name of pin
> Number number of pin
> SFlags symbolic or numerical flags
> NFlags numerical flags only
>
>
> Can you look at your element file for the fiducial and change the mask 
> flag and see what happens?
>
> This would give solder mask no opening, so fiducial covered with....
> and also fiducial no stencil opening, so not pasted on...
>
> Is you soldermask clear enough?
>
> Does this need to be a feature?
>
> John G
>
>
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