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Header Part Creation - Pads Have 0.02mm Clearance

Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Questions & Answers
Forum Description: issues and technical support
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=1204
Printed Date: 19 Nov 2024 at 2:41am


Topic: Header Part Creation - Pads Have 0.02mm Clearance
Posted By: Smooth.Sailing
Subject: Header Part Creation - Pads Have 0.02mm Clearance
Date Posted: 12 Dec 2013 at 12:02am

I created a 1x2 Header, Vertical.  Used a pitch of 1.27 mm and a square post of 0.40 mm.  The result was a hole of .75 mm and a pad of 1.25 mm.  Should a 0.02 mm clearance beween pads generate a warning?

The manufacture recommends a hole of .70 mm and does not recommend an annular ring.  

Clearly this can all be rectified by using the manufacture setting to enter something that will work.  However, given that you have this type of part as an auto feature, I thought you might like to know these results.

Also should silkscreens overlaying pads generate a warning?

 I am a newbie.  I apologize if I have missed something.

 


Replies:
Posted By: Tom H
Date Posted: 12 Dec 2013 at 7:38am
Only the Surface Mount component families have pad to pad trimming and warnings. The SMT calculator can Trim Pads to meet the rules and provide a warning.
 
You cannot trim through-hole pads because you would remove annular ring.
 


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