You may want to check with LPKF at (503)643-0604, for one of their
Protomats. Their machine is designed to allow you to make a complete 2-sided
circuit board from a copper clad piece of board material. For that purpose
the thing is using the Gerber data from the ecb design program.
As you are planning to modify multiple boards (I presume) you can use a
portion of the Gerber data, modify it and under computer control make the
change as often as you want. This machine also allows (with some skill) a
controlled depth drill action to break an internal run.

Have fun,
Ahne Oosterhof.

-----Original Message-----
From:   TechNet [mailto:[log in to unmask]] On Behalf Of Aric Anderson
Sent:   Friday, June 25, 1999 7:37 AM
To:     [log in to unmask]
Subject:        [TN] High Precision Drill Press

Good Friday to all you TechNetters,

I am in need of a precision drill press for making disconnects on our
boards.  High quality, low-mid priced and reliable are the criteria I am
looking for.

Please let me know of any you might have seen or currently own.

Also, I would like to get a poll quickly of a simple disconnect
procedure.  What size drill bit do you use compared to the width of the
trace and how do you determine minimum electrical spacing, I seem to
have much disagreement on these and IPC-7721 is very vague.


Thank You All