Electronics > Altium Designer

Fiducials

(1/5) > >>

rockybyt:
My question for the experimented guys goes here: What is a fiducial mark? I mean... i know what it is and why it is so useful but, how do you place fiducials in Altium Designer?

Do i have to create a custom component (just a simple round pad on the top layer) or is something more complex than that? Do i have other options? Has Altium a default fiducial footprint?

I would appreciate your help guys. Thanks!

hans:
I don't know how to place them or whether there is a built in function. I would place a circle pad with a lot of solder mask expansion. Unfortunately, I don't know what typical sizes are good..

Psi:
i'm not sure either but i suspect it's part of the Altium "panelization" process.

I think Dave might have mentioned some info about their size in this video.
But i haven't rewatched it to confirm.

!

Short Circuit:
Usually, you make a component for this.
In Altium this can be labelled as Standard (No BOM), so it does not pollute the BOM.

The shape is just a single round SMD pad, somewhere between 0.8 and 1.5mm diameter.
Set the paste mask expansion fixed to 0mm, and the soldermask expansion approximately
equal to the pad radius, so it becomes twice the diameter. Set the clearance such that no
traces are allowed in the SM area.
Exact values would depend on your board density and parts used. Working on a next gen
iPad, you probably want as small as possible. But for general boards you'd go for the larger
sizes, as you do not want the fiducials to be the limiting factor for the production line...

rockybyt:
Thank you very much guys :)

Navigation

[0] Message Index

[#] Next page