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September 1999

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Subject:
From:
Jerry Cupples <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 2 Sep 1999 15:19:47 -0500
Content-Type:
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Vinit Verma said:

>I have used Philips Emerald series for this purpose to full satisfaction.
>(no problems at all!!) Regarding Fuji CP6 or any other turret head machine
>for that instance (Panasert/Sanyo/Universal/TDK....) they CANNOT place
>0402. If you believe me and the reports in the industry they cannot even
>place 0603 with good confidence level. Reason--very simple. The centrifugal
>force throws the component before placing it on the PCB. I know users on
>Fuji in Singapore who have experience this problem.

Maybe in the southern hemisphere, geomagnetic forces combine affect the
rotational inertia of the turret and overcomes the nozzle vacuum to a
greater degree. You might try turning the turret the opposite direction.
The dynamic mathematical proof of this is beyond the scope of this posting,
but in this part of the globe, using turret chipshooters for 0402's seems
to be fairly well established. ;-)

And Venit, you seem to be about five days ahead of the international date
line, based on your posting dated Sept. 6 appearing on the first.

My experience is that whenever you say "cannot" (even lowercase) you will
attract several people who will explain how it is done, especially on
TechNet.


cheers,



Jerry Cupples
Interphase Corporation
Dallas, TX USA
http://www.iphase.com

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