Tony,
Well (back in the old days) once film has been generated from gerber (or
hand tape) they could bomb-site the film for coordinates. However I don't
honestly know of any fab houses that still do this. I'm
sure there are, just have not delt with any in recent times.
But honestly the fab house could generate drill data off of your pads layer
gerber with there CAM software, however he then needs a way to match up hole
size to locations. So why make it much easier for the fabricator to make a
mistake with potential manual operations more prone to error. Because there
could be many different pads sizes with the same drill size and visa versa.
As you said you should always provide drill data. Too much room for error.
Also
pretty much any CAD system I know of generates drill data so why not make
life easy. I would not be
surprised if the fab house hits this person up for a hefty tooling charge to
deal with the fact there
is no drill data.

Robert M. Wolfe, C.I.D.
47 Chatfield Drive
Trumbull, CT 06611
203-261-2182
[EMAIL PROTECTED]
----- Original Message -----
From: "Tony Karavidas" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Wednesday, October 17, 2001 4:31 PM
Subject: Re: [PEDA] layers in camtastic ??


> Sure a drill file is used. How else would they know where to drill the
holes
> and what size to make them?
>
> Gerber files and drill files are separate. Camtastic deals with the
gerbers,
> but has no idea where the holes sold be. For your project, if all you did
> was add text to layers, but didn't change or move any pads, they should be
> able to use the same drill file.
>
>
>
> > -----Original Message-----
> > From: Robison Michael R CNIN [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, October 17, 2001 12:52 PM
> > To: 'Protel EDA Forum'
> > Subject: Re: [PEDA] layers in camtastic ??
> >
> >
> > thanks for the help.  it worked like a charm.  i had to bang around a
> > bit to tweek the silkscreen text in like i wanted it.  seems like the
> > actions for dragging and deleting stuff are just a bit different than
i'm
> > used to.
> >
> > but then when i went to save the bottom silkscreen, it wouldn't save
> > just a single file.  evidently because i had opened a complete set of
> > gerbers, it demanded that i save it as a cam file.  so i saved it as a
> > cam file and then looked thru the menu for a gerber export.  i couldn't
> > find anything to do the job.  i got cute and tried an F9 to see
> > if it worked
> > like protel in the cam manager, but it just laughed at me.  but i
browsed
> > thru the tool icons and  found an "export gerber data" tool, which did
the
> > trick.
> >
> > my question is this (were you wondering when i was going to get around
> > to it?  ;-):  normally when i run cam manager in protel i do a gerber
run
> > and then go back and run the ncdrill.  the camtastic has a "drill
> > out basic"
> > tool, but it wants me to select an existing layer to perform the
operation
> > upon.  i say, "huh?"
> >
> > i thought i heard rumors that a drill file isn't even used by a
> > board house
> > nowadays.  i've only got silkscreen, solder mask, and layer files right
> > now (that is, from the new cam).  what else do i need to generate from
> > camtastic?  nothing?  i notice that there's an ncd file in the
> > original set
> > of
> > gerbers that i don't believe was sucked into camtastic.  do i send that?
> > why didn't camtastic import the ncd file?  is it a separate
> > import from the
> > gerbers?
> >
> > thank you, miker
> >
>

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