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How To Genereate CAPAE Footprint?

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Sujith View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Sujith Quote  Post ReplyReply Direct Link To This Post Topic: How To Genereate CAPAE Footprint?
    Posted: 12 Sep 2016 at 6:23am
Hi,

I am new to this tool.
I was trying to generate a footprint foor SMD Aluminium Capacitorm but no success !


whats wrong am doing? please help
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Tom H View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2016 at 7:09am
Do you see the blue dots in the dimensions?

Only enter any 2 of 3 that you want and never enter all 3. You'll get bad results due to over calculation of tolerances.

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Sujith View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Sujith Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2016 at 8:43am
Ahh..yes, I missed it.

It got worked now..Smile.

In the component data sheet by the mafr the pads values are : L=5.5, W=1.2+-0.3, P=6.7 . is this values are based on nominal or most or least? 

and the generated footprints measurement were :

Most             Nominal        Least

L=6.83         L=6.46         L=6.12
W=2.7          W=2.52        W=2.31   other dimensions like outline and courtyards also varies, i didt checked.

here I got the width of the pads entirely wrong it seems? 

and its a bit confusing which footprint (n,m,l) to use , in the internet most people suggests to use nominal footprints. 

Actually what is the best practice to follow?
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2016 at 9:08am
Most people use Nominal Density Level, which is a default setting.

Maximum Density is used for space satellites.

Least Density Level is used for RF design or extremely dense designs.

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Post Options Post Options   Thanks (1) Thanks(1)   Quote Sujith Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2016 at 9:36pm
Ok...thanks for the info.

but how to get the correct pad width? instead of 1.2 +-0.3 am getting 2.51 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 13 Sep 2016 at 7:38am
The solder joint goals in LE Lite are in the tab Terminal > Density Level > Toe, Heel and Side.

You can control the entire solder joint by adjusting those values.

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