PCB Libraries Forum : Pad to Slot Ratio https://www.PCBLibraries.com/forum/ Mon, 06 Apr 2026 10:01:47 +0000 Thu, 01 Nov 2018 07:39:33 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=2394 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Pad to Slot Ratio : Slotted holes are mostly used...]]> https://www.PCBLibraries.com/forum/pad-to-slot-ratio_topic2394_post9842.html#9842 Author: Tom H
Subject: 2394
Posted: 01 Nov 2018 at 7:39am

Slotted holes are mostly used in the Foot Print (FP) Designer program in Library Expert. 

Mostly in connectors and the slots can be offset from the pad too. 

]]> Thu, 01 Nov 2018 07:39:33 +0000 https://www.PCBLibraries.com/forum/pad-to-slot-ratio_topic2394_post9842.html#9842 <![CDATA[Pad to Slot Ratio : Slotted Holes are in Mounting...]]> https://www.PCBLibraries.com/forum/pad-to-slot-ratio_topic2394_post9840.html#9840 Author: Batiskaff
Subject: 2394
Posted: 01 Nov 2018 at 2:09am

Slotted Holes are in Mounting Hole only, or are another families with ones?
]]> Thu, 01 Nov 2018 02:09:25 +0000 https://www.PCBLibraries.com/forum/pad-to-slot-ratio_topic2394_post9840.html#9840 <![CDATA[Pad to Slot Ratio : The Pad to Hole ratio is set to...]]> https://www.PCBLibraries.com/forum/pad-to-slot-ratio_topic2394_post9839.html#9839 Author: Tom H
Subject: 2394
Posted: 31 Oct 2018 at 7:26am

The Pad to Hole ratio is set to 1.5. This means the pad size is 1.5 times bigger than the hole size. 

Example: if the Hole Size is 1.00 the Pad Size is 1.50 or 0.25 annular ring. If the hole size is 2.00 the pad size will be 3.00 or 0.50 annular ring. 

The same theory is used for Slotted Holes but with a 1.75 multiplier. This is because the slotted hole drilling process of drill and drag. The annular ring needs to be more robust. 

However, all these values can be edited by the user to be whatever you think is best. The default values are our best option but all Preference values are user definable for you to customize your personal PCB library. 

]]> Wed, 31 Oct 2018 07:26:19 +0000 https://www.PCBLibraries.com/forum/pad-to-slot-ratio_topic2394_post9839.html#9839 <![CDATA[Pad to Slot Ratio : What mean &#034;Pad to Slot Ratio&#034;...]]> https://www.PCBLibraries.com/forum/pad-to-slot-ratio_topic2394_post9838.html#9838 Author: Batiskaff
Subject: 2394
Posted: 31 Oct 2018 at 4:09am

What mean "Pad to Slot Ratio" from Through Hole - Terminal - Settings. Where it used?
]]> Wed, 31 Oct 2018 04:09:40 +0000 https://www.PCBLibraries.com/forum/pad-to-slot-ratio_topic2394_post9838.html#9838