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June 1998

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Subject:
From:
"d. terstegge" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 22 Jun 1998 15:52:19 GMT
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Hello Technet,

Sometimes I'm having bad placements with oure pick & place process
due to bent corner leads on 0.5 mm pitch IC's. The machine then
complains about an incorrect "run lenght" (distance between the
center of the first, and the center of the last lead of the row) and
gives us the choice of rejecting the part or placing it inaccurately.
Instead of manually improving rejected components with tweezers or
some other tools, I would prefer sending the components back to the
supplier. The problem with this is that I'm not aware of any
specification for things like "bent leads", "sweep (all leads
pointing a little bit sideways)" or "run lenght". Does anyone know
such a specifications ? Anyone knows of "generally accepted values" ?

Daan Terstegge
Unclassified

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