Re: gEDA-user: plated mounting holes

[Stefan Salewski <mail@xxxxxxxxxxxx>]

On Fri, 2009-10-23 at 15:24 -0400, DJ Delorie wrote:
> 
> You can do the same thing with an element, and probably should, as
> mounting holes should be treated as elements.  It would have one Pin()
> (for the hole and inner copper) and two Pad()s (for the outer coppers).
> Plus whatever silk you want to identify it.
> 

Thanks for the explanation.

I have added this type of mounting hole to my sfg footprint generator.
(It uses a fixed minimal annular ring of 10mil for the pin, and pads on
component and solder side. We may consider making the annular ring
adjustable, do we need that?)

http://www.ssalewski.de/SFG.html.en

Here is an input file and the resulting element. Let me know if
something is wrong.

stefan@AMD64-X2 ~/Downloads $ cat input.txt 
Device = Global
  elementdir = "./"
  silkwidth = 10 mil
  silkoffset = 10 mil
  textpos = upperleft
  textorientation = horizontal
  refdessize = 100
  mask = 6 mil
  clearance = 10 mil

Device = MountingHole
  defaultunit mm
  hole-scale = 100
  hole-add-on = 0.1 mm
  description = "Mounting hole 4mm, for screw with 8mm head, plated"
  desc = "Hole 4mm"
  drill-dia = 4
  pad-dia = 8 
  silk-dia = 0 # auto adjust
  Generate Hole-4mm_Head-8mm_plated.fp

stefan@AMD64-X2 ~/Downloads $ ruby sfg.rb input.txt 
stefan@AMD64-X2 ~/Downloads $ cat Hole-4mm_Head-8mm_plated.fp 
Element["" "Hole 4mm" "Hole-4mm_Head-8mm_plated" "" 0 0 -17748 -24748 0 100 ""]
(
  Pin[0 0 18142 2000 19342 16142 "1" "1" ""]
  Pad[0 0 0 0 31496 2000 32696 "1" "1" ""]
  Pad[0 0 0 0 31496 2000 32696 "1" "1" "onsolder"]
  ElementArc[0 0 17248 17248 0 360 1000]
  Attribute("name" "Hole-4mm_Head-8mm_plated")
  Attribute("description" "Mounting hole 4mm, for screw with 8mm head, plated")
  Attribute("desc" "Hole 4mm")
)





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