How are boards handled within your pick an place equipment? Is your machine
clamping on the rail?
How does the stencil printer secure the board? How close would printed paste
be to the board edge? 

A word of caution. Flexing the board while breaking the edges off can damage
SMT solder connections. 

*** We are Moving - March 15, 2007 ***
Guy Ramsey
R&D Assembly
1660 East Race Street
Allentown PA 18109-9580
(610) 264-1887
FAX (610) 264-1877

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting
Sent: Tuesday, February 20, 2007 8:35 AM
To: [log in to unmask]
Subject: [TN] 0.5 inch breakaway rail on board edges

Good morning all,
 
For our PTH design boards we include a 0.5 inch wide v-scored rail on
all four sides.  These rails contain alignment holes for our Contact
Systems machines.  They also allow us to handle the boards through the
finger conveyor with components out to the edge of the finished board
and easily store in the board storage racks.
 
A question has been raised, for cost cutting reasons, if these are
really necessary for SMT design boards.  Should we just design them
one-up with no rails and let the fab house and CM work out the final
configuration?
 
Thanks in advance.
 
Phil Nutting

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