Jedec std gives only min and max sizes on outline dim.However Jedec std
is quite useful for component pitch, tray carrier etc.
Actual measurement is important as all vendors can  different-one way or
other. These variations can create no of process problems.

Use comp database option which is normally available  in all
eqpts.Database need first time measurement data which can be used for
all future applications.Since database is specific to actual kind of
devices used, Probably, you are the beast person to make one.

Many of new machines do not ask for most of components and thus unload
this task.You may need to ask machine supplier of pick and place
machine.


> ----------
> From:         Marie-Josee Lambert[SMTP:[log in to unmask]]
> Sent:         October 1, 1997 10:52 AM
> To:   [log in to unmask]
> Subject:      [TECHNET] assem: shape code library
>
> Hello Technetters!
>
> We are experiencing problems with the physical description of
> components
> for the vision system of our Pick & Place equipment. A lot of time is
> spent
> measuring devices and the precision of those measures is not always
> good,
> causing rejection of parts, misplacement, etc.
>
> I would like to know:
>
> 1- Is there any ready-made shape code librairies available on the
> market
> for automatic Pick & Place equipment (Panasonic)?
>
> 2- Is there anyone who is using theoretical mechanical dimensions for
> shape
> code librairies instead of measuring the components (for example:
> JEDEC
> standard)? If yes, is it reliable?
>
> Any information will be greatly appreciated.
>
> Thank you,
>
>
> Marie-Josee Lambert
> Process Eng.
> Matrox Electronics System
> E-Mail: [log in to unmask]
>
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