PCB Libraries Forum : Tolerance https://www.PCBLibraries.com/forum/ Tue, 14 Apr 2026 04:08:54 +0000 Mon, 30 Apr 2018 07:29:47 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=2324 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Tolerance : SOT-89 has an irregular shape...]]> https://www.PCBLibraries.com/forum/tolerance_topic2324_post9605.html#9605 Author: Tom H
Subject: 2324
Posted: 30 Apr 2018 at 7:29am

SOT-89 has an irregular shape pin 2 and it's a different shape and size for every mfr. 

Library Expert cannot auto-generate irregular pad shapes yet as this requires associated copper poly shapes. 

We manually create SOT-89 and upload them to POD. 

Check the mfr.'s Diodes and NXP for the Case Code SOT89 or SOT-89 and download those parts. 

If you have a new SOT-89, we'll be glad to build it for $5 and share it with everyone else for free download. 

]]> Mon, 30 Apr 2018 07:29:47 +0000 https://www.PCBLibraries.com/forum/tolerance_topic2324_post9605.html#9605 <![CDATA[Tolerance : Hassan Moaaz wrote:Hello,Also...]]> https://www.PCBLibraries.com/forum/tolerance_topic2324_post9604.html#9604 Author: Batiskaff
Subject: 2324
Posted: 30 Apr 2018 at 4:50am

Originally posted by Hassan Moaaz Hassan Moaaz wrote:

Hello, 

Also How can i generate footprint for package SOT-89 it found in reference but i can't found in tool



+1 good question. How to сreate SOT-89?
]]> Mon, 30 Apr 2018 04:50:55 +0000 https://www.PCBLibraries.com/forum/tolerance_topic2324_post9604.html#9604 <![CDATA[Tolerance : When you have different +/- tolerances,...]]> https://www.PCBLibraries.com/forum/tolerance_topic2324_post9581.html#9581 Author: Tom H
Subject: 2324
Posted: 11 Apr 2018 at 10:54am

When you have different +/- tolerances, enter the Min/Max data instead of Nominal + Tolerance.

When you enter the Min/Max data, a new Nominal dimension will be auto generated.

The Nominal = the value between the Minimum and Maximum.

This will also affect the Footprint Name, which uses the Nominal dimensions.
]]> Wed, 11 Apr 2018 10:54:53 +0000 https://www.PCBLibraries.com/forum/tolerance_topic2324_post9581.html#9581 <![CDATA[Tolerance : Hello,Why i can&#039;t generate...]]> https://www.PCBLibraries.com/forum/tolerance_topic2324_post9580.html#9580 Author: Hassan Moaaz
Subject: 2324
Posted: 11 Apr 2018 at 8:52am

Hello, 

Why i can't generate footprint with tolerance not equal plus and minus and when i add values as example below it change automatically
As example  D = 1 - 0.1 +0.2 ? to be  1.05 +/- 0.15

Also How can i generate footprint for package SOT-89 it found in reference but i can't found in tool


]]> Wed, 11 Apr 2018 08:52:56 +0000 https://www.PCBLibraries.com/forum/tolerance_topic2324_post9580.html#9580