re: PCB artwork to PCB tooling hole registration/tolerance

figure +/- 3 mils for standard panel size and std drilling setup.  Can be reduced is using local optical alignment and a Precision Drill (not available at most fabs and low volume only)

-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Vargas, Stephen M
Sent: Wednesday, February 24, 2021 6:00 AM
To: [log in to unmask]
Subject: [EXT] [TN] PCB Question

Good morning, a question arose where I need some help. We have a PCB which mounts into a chassis then mates to another board in the same chassis via a right angle male header to a female connector. The issue is that the male connector does not protrude fully into the female connector. We know the issue is that the spacing between the two boards is incorrect, but we'd like to do a full dimensional tolerance analysis to determine the optimal spacing. One question that arose which I cannot answer and I'm hoping to get some assistance with, is related to the PCB artwork to PCB tooling hole registration/tolerance. I did a quick look through many of the IPC board specifications, but wasn't able to find anything. I'm thinking my searching skills are waning, so I'd like to get some help from this group. Thanks in advance.

Regards,
Steve Vargas