Morning Kris,
I didn't see any responses, so thought I'd take a stab.

IPC-2615, PCB Dimensions & Tolerances.
Section 6.3.2.1, Positional Tolerance Applied at MMC
The section relates to perpendicularity in terms of:
a. surface of a hole and
b. axis of a hole
Figures 6.7 & 6.17 illustrate the theory & Drawing tolerancing.  Measurement
seems to be done in terms of hole location on top & bottom surface of the
board.

Of course, perpendicularity is also controlled generally by pad annular ring
& surface location of any toleranced hole.
..............
My thought-
For a rough angular measurement, could you:
1. Insert a (snug) pin gauge through the hole in question so the pin
protrudes a certain distance
2. Measure out the same distance (from the hole) on the board surface
(creating a triangle).
3. Measure the 3rd side & do the math magic to determine the pin's (and
hole's) angle relative to the board surface.

Regards,
Mark


        -----Original Message-----
        From:   Kris Keating [SMTP:[log in to unmask]]
        Sent:   Tuesday, May 06, 2003 4:52 PM
        To:     [log in to unmask]
        Subject:        [TN] perpendicularity of holes in a PCB

        Hello,
        Does anyone know of any documents or test methods for measuring the
        perpendicularity of holes in a PCB?



        Kristopher J. Keating
        Technical Service Engineer
        Circuit-Wise, Inc.
        400 Sackett Point Rd.
        North Haven, CT 06473
        Tel. (203) 281-6511 x 410
        Fax (203) 287-8409


---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------