Size Over Hole
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=2002
Printed Date: 26 Dec 2024 at 7:28am
Topic: Size Over Hole
Posted By: hbostrom
Subject: Size Over Hole
Date Posted: 08 Nov 2016 at 4:05am
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Maybe a stupid question but, what is the meaning of the option "Size over hole"? If a define a through hole padstack with a diameter of 3mm and then check the padstack manager, the parameters show "Size/XY" 1mm and "Size Over Hole Y" -2mm.
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Replies:
Posted By: Tom H
Date Posted: 08 Nov 2016 at 8:15am
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Where do you see "Size Over Hole" in Library Expert? ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: hbostrom
Date Posted: 09 Nov 2016 at 8:34am
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Posted By: Tom H
Date Posted: 09 Nov 2016 at 9:20am
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The Size over the Hole is exactly that. Example: you have a 1.10 pad with a 0.70 hole = 0.40 Size over the Hole You have the choice of changing the Pad Size or the Size over the Hole value. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: hbostrom
Date Posted: 10 Nov 2016 at 12:22am
| But then it doesn't really make sense when the program automatically fills in a negative value for that option. And I still don't see when I would want to use this, all that's needed to define a hole is the drill diameter and the pad diameter, this third parameter is just confusing and it's not at all clear what it's purpose is. |
Posted By: Tom H
Date Posted: 10 Nov 2016 at 7:14am
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All non-plated holes get a pad size that is much smaller than the hole size, thus the negative number. It's simply a feature that allows you to see the annular ring value on Plated Through Holes. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |