Florian, thank you very much.
If realy works than this is the right answer.
However my first look, shows there is no drill-aid.ulp in my
Eagle 4.0 Can you help me, sending me this file ?
I'll try also to the pointed location.

Thanks again,
Vasile

On Tue, 19 Nov 2002, Florian Voelzke wrote:

> Hi,
>
> so if I understand you guys correct, you want something like a "drill
> aid" for hand drilling?
>
> Solution 1: You can have a deep look in the ulp directory of eagle,
> there is an user language programm named drill-aid.ulp. It places small
> circles above any hole on an extra layer and reduces the "visible" hole
> diameter. You just switch of the drill aid layer if you want to have it
> made by a board house. (There are other interesting ulp programs, I
> think there is one for changing drill diameters in already placed parts.
> Also try the download/ulp section.)
>
> Solution 2 (the one I use): Print your PCB as postscript with the help
> of the CAM processor. And then edit the postscript file. Postscript is a
> sort of programming language including functions, just modify the "draw
> a hole"-function!
>
> Search for:
>
> /h {  % draw a hole
>     /d  exch def
>     /y  exch def
>     /x  exch def
>     d 0 gt {
>       newpath
>       x EU y EU d 2 div EU 0 360 arc
>       currentgray dup
>       1 exch sub setgray
>       fill
>       setgray
>       } if
>     } def
>
> "x EU y EU d 2 div EU 0 360 arc" is the interesting line, it draws an
> arc. "d 2 div" is the calculation of the hole diameter, so just change
> it to a constant value of your choice. Try something between 2000 and
> 1000. Now all holes have the diameter you entered.
> Convert the modified postscript file to whatever you need with ghostscript.
>
> Advantages: No changes to the board, no changes to the libraries. No
> need to rewrite the library or to have two sets of libraries.
> Disadvantage: A bit of handwork
>
> Before I discovered the second method, my homebrew boards looked, well,
> unprofessional...
>
> Florian Voelzke
>
>
>
> Bob Ammerman wrote:
> > Olin,
> >
> > For homebrew, people like to use a very small drill size. This just gives
> > them an accurate center for hand drilling and is not related to the actual
> > size required.
> >
> > Remember--the home brew folks are generally _not_ using plated thru holes.
> >
> > Bob Ammerman
> > RAm Systems
> >
> > ----- Original Message -----
> > From: "Olin Lathrop" <olin_piclist@EMBEDINC.COM>
> > To: <PICLIST@MITVMA.MIT.EDU>
> > Sent: Tuesday, November 19, 2002 8:08 AM
> > Subject: Re: [EE]: eagle question ...
> >
> >
> >
> >>>It's the tools/DRC/restring specifications. There is a situation when
> >>>changing the drill diameters in brd are very important, assuming you
> >>
> >>plan
> >>
> >>>production and first time you need to create a homebrew pcb and then
> >>>production. This means you need two different libraries, because for
> >>>homebrew board the drill diameter it's really small and used just for
> >>>drill steerage but for production the drill must be the real one.
> >>
> >>I don't understand.  Whether homebrew or not, the pins must still fit into
> >>the holes.  Also, if you are drilling the holes yourself, you can use any
> >>drill bit you like.  The DRD and DRL files wouldn't be any use unless
> >>you've got your own NC drilling machine.
> >>
> >>
> >>*****************************************************************
> >>Embed Inc, embedded system specialists in Littleton Massachusetts
> >>(978) 742-9014, http://www.embedinc.com
> >>
>
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