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June 2006

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Subject:
From:
Martin Butcher <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Martin Butcher <[log in to unmask]>
Date:
Mon, 5 Jun 2006 07:54:57 -0700
Content-Type:
text/plain
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text/plain (46 lines)
I go with the simple rule, use the largest nozzle that will fit on the part
without leaking.

-----Original Message-----
From: Jenny Drake [mailto:[log in to unmask]]
Sent: Monday, June 05, 2006 7:49 AM
To: [log in to unmask]
Subject: [TN] Vacuum pick up nozzle area for component weight.


Is there a good rule of thumb for determining the minimum vacuum pick up
nozzle size that will work with a component of a given weight? I am
guessing that the problem is reasonably complex as the component mustn't
move on the nozzle under lateral and rotational acceleration as it is
moved from the tray, or tape, to the PCB. The strength of the vacuum,
the friction between the nozzle and component materials and the centre
of gravity of the component will all affect this for a give component
weight and machine acceleration. Is there a simple rule that people use
that gives good results?

Jen

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