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Size Over Hole
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hbostrom View Drop Down
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    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.

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Tom H View Drop Down
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Points: 5718 		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?

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Points: 5718 		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.

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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.
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Points: 5718 		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.

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