PCB Libraries Forum Homepage
Forum Home Forum Home > PCB Footprint Expert > Questions & Answers
  New Posts New Posts RSS Feed - Size Over Hole
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Size Over Hole
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
hbostrom View Drop Down
Active User
Active User


Joined: 04 Nov 2016
Status: Offline
Points: 38 		Post Options Post Options   Thanks (1) Thanks(1)   Quote hbostrom Quote  Post ReplyReply Direct Link To This Post Topic: Size Over Hole
    Posted: 08 Nov 2016 at 4:05am
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.

Back to Top
Back to Top
Tom H View Drop Down
Admin Group
Admin Group
Avatar

Joined: 05 Jan 2012
Location: San Diego, CA
Status: Offline
Points: 5716 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 08 Nov 2016 at 8:15am
Where do you see "Size Over Hole" in Library Expert?

Stay connected - follow us! X - LinkedIn
Back to Top
hbostrom View Drop Down
Active User
Active User


Joined: 04 Nov 2016
Status: Offline
Points: 38 		Post Options Post Options   Thanks (0) Thanks(0)   Quote hbostrom Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2016 at 8:34am
Back to Top
Tom H View Drop Down
Admin Group
Admin Group
Avatar

Joined: 05 Jan 2012
Location: San Diego, CA
Status: Offline
Points: 5716 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2016 at 9:20am
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! X - LinkedIn
Back to Top
hbostrom View Drop Down
Active User
Active User


Joined: 04 Nov 2016
Status: Offline
Points: 38 		Post Options Post Options   Thanks (0) Thanks(0)   Quote hbostrom Quote  Post ReplyReply Direct Link To This Post 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.
Back to Top
Tom H View Drop Down
Admin Group
Admin Group
Avatar

Joined: 05 Jan 2012
Location: San Diego, CA
Status: Offline
Points: 5716 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2016 at 7:14am
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! X - LinkedIn
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.141 seconds.