Hi Justin,

I'm not familiar with the Juki machines.
But with our (Philips) Eclipse II machine the PLCC algorithm can be a usefull tool in those cases.
Hope it works for U2.


Jowan  Iven
Process  Engineer  Manufacturing
Stork Electronics
The Netherlands



-----Original Message-----
From:   Justin Braime [SMTP:[log in to unmask]]
Sent:   Monday, September 04, 2000 2:36 AM
To:     [log in to unmask]
Subject:        Re: [TN] laser centering RESNETs

The resnets are "innies" as you so eloquently described :-)
I'm using the laser algorithm for chip components on the Juki
The resnets measure ok on the laser - same result as digital calipers...
Are the "innies" causing some weird reflection with the laser when rotating the component for centering?

J.

----- Original Message -----
From: Stephen R. Gregory
To: [log in to unmask]
Sent: Monday, September 04, 2000 11:39 AM
Subject: Re: [TN] laser centering RESNETs


In a message dated 9/3/00 5:49:05 PM EST, [log in to unmask] writes:

<< Hi guys and gals,
 I'm having some problems placing a resistor network component (1206).
 Sometimes there is a slight rotational error on placement, sometimes the
component is out in the x axis (at 0 or 180 deg rotation)
 or out in the y axis (at 90 or 270 deg rotation).
 The machines are Juki 750 & 760 (using laser centering)
 Other components are centering fine...
 Any ideas???

 Help!!!

 Justin Braime >>
Hi Justin!

I don't know if you know, but there's two types of chip resistor networks.
What I call a "innie" and a "outie". The "outie" has what looks like leads
for the terminations, like my ascii drawing below:
   _   _   _   _
 _) (_) (_) (_) (_
|                 |
|_   _   _   _   _|
  )_( )_( )_( )_(

A "innie" has castellations for the terminations...
 _   _   _   _   _
| (_) (_) (_) (_) |
|  _   _   _   _  |
|_( )_( )_( )_( )_|

The "innies" you can program like a 1206, the "outies" you have to program
like a leaded component, because the laser sees the body and then the "leads"
off of the body...

Let me know if that doesn't work...

-Steve Gregory-

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