The method is half the battle.
I asked before what a good distance (amount) specification of bow was
used. I only got one that was .0075 which we normally used .010.
I think we will use .0075 when the need for a tighter tolerance is necessary
and .010 will be used normally.

Chris Robertson
CAD/CAM Engineer
Lockheed - Martin Services, Inc.
4912 Research Dr.
Huntsville, AL 35805
[log in to unmask]
Ph/Fax (256) 722-2626
ICQ# 13541566



> It is in my copy of IPC-A-600 Rev E towards the back where the IPC-TM-650
test
> methods are listed.
>
> Scott
>
> --
> Scott Buscomb, C.I.D.
> Senior Designer
> Techsonic Industries Inc.
> PH 770 475-3020 x1032
> FX 770 475-4090
> [log in to unmask]
>
>
>
> Dee Stover wrote:
>
> > I need the proceedure on how to measure bow & twist of circuit board.
Can
> > anyone help?
> >
> > I don't have IPC-TM-650, I thought this would be cover in either
IPC-A-600
> > or the IPC-2220 series, but it refers the TM-650.
> >
> > Thanks,