add fiducials in orcad pcb

[SagSag]

hey

can anyone help me understand how to add fiducials to my layout with Orcad PCB?
how can I add them and on which layers should they appear?

thanks

 

[anil.rajun]

1.> Create a Fiducial footprint.
2.> Add to board(Like any new footprints addition to board).

Fiducials are come accross on Top Layers (Component Side Layers). these fiducials helpful for a reference point in Pick place machines.

 

[SagSag]

thanks anil.
are there any built in footprints of Fiducual that can make it easy?

 

[marce]

http://www.dynamixtechnology.com/docs/smema3.1.pdf

3 min global per board, local fids for components not realy required these days as PAP machines have evolved over the years, but always worth checking with your EMS or in house production.

 

[anil.rajun]

I think Local fiducials are required because for BGA's placement using PAP machines, should need near reference point.

 

[marce]

Depends on board size, PAP machine capabilities, up to double eurocard havn't required them, most decent machines have a camera that will view the footprint and adjust placement on the fly. Plus the fids take up valuable real estate. I havn't personaly had to use a local fid since 2000.
Again to reiterate, if you have an in house production department talk to them, if you use an external assembly house talk to them.