[PCB_FORUM] Re: paste pad on fiducial

 
There was a time this was true.  The vision systems on early pick 'n
place machines saw the matte paste better than the relatively shiny
HASL.  Don't think that's the case anymore :))
 
 
-- 
George Patrick
Tektronix, Inc.
Central Engineering, EDS Applications Support
P.O. Box 500, M/S 39-512
Beaverton, OR 97077-0001
* 503-627-5272 (voice)     * 503-627-5587 (fax)
<http://www.tektronix.com/> 
http://www.tektronix.com     <http://www.pcb-designer.com/>
http://www.pcb-designer.com
 
"Off-Grid and Proud of it!"

-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Julian
Ungureanu (jungurea)
Sent: Friday, May 18, 2007 12:17
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: paste pad on fiducial


I'll take a free guess, too:
The pick and place machine uses it for alignment.
 
Julian

  _____  

From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Douglas Stanley
Sent: Friday, May 18, 2007 12:12 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: paste pad on fiducial


Does it give the assembler something to help register the stencil on the
board? Just guessing...
 
 

  _____  

From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Ed Caldwell
Sent: Friday, May 18, 2007 12:02 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] paste pad on fiducial



I can't remember why paste pads are on fiducials... can anyone help me. 

Thanks, 
Ed

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