Explanations for the design rules?

[anthonyEX9NB]

I'm having trouble locating documention. Specifically, I'm looking for good explanations with calculation examples of the tabs in the DRC. Can you please post a link to more info to the design rule tabs in the DRC?

[jorge_garcia]

Hi @anthonyEX9NB,

This would be a good place to start
https://help.autodesk.com/view/fusion360/ENU/?guid=ECD-DESIGN-RULES-REF

https://help.autodesk.com/view/fusion360/ENU/?guid=ECD-MULTI-REF

There's no page as far as I'm aware of for the new layer stack manager but the above will help cover most of your questions.

If you need info about specific errors then I recommend looking at section 6.7 of the EAGLE manual. I've uploaded it for your convenience.

Let me know if there's anything else I can do for you.

Best Regards,

[anthonyEX9NB]

I'll give these links a read and see if the info is explained better than the Eagle 7.7.0 manual that I already have. I find the 7.7.0 manual difficult to read because it is a clunky translation to English from German (I think German)

I was specifically looking for a better explanation of the SMD section of the Shapes tab for specifying the roundness of pad corners. The Min and Max are spefified in units of length, or probably a radius, but the rounding factor is a percentage. A percentage of what is my question. As is my assumption that the Min and Max a radii? As is the radius centered at the pad center?

[jorge_garcia · Accepted solution]

Hi @anthonyEX9NB,

I hope you're doing well. The roundness only applies to the corners of the pads with 0% keeping the corners square and 100% turning the square pad round. You can't really specify a specific radius in the settings there.

Definitely room for improvement here.

Best Regards,

[anthonyEX9NB]

I didn't like your answer, Jorge, regarding how to set the roundness of the rectangular pads in the Shapes tab of the DRC. I still wanted to know what the % field was, like a percent of what? So I fgured it out a came up with an explanation.

Attached is a drawing to illustrate how rectangular shaped pads are rounded. I hope others will be able to understand how this works now.

[jorge_garcia · Accepted solution]

Hey @anthonyEX9NB,

Thanks for taking the time to make the drawing, I asked a developer and this is his response which is basically the same thing you arrived at

any %age in between give us a rounded rectangle for which the corner radius is calculated from the minimum of the width and height divided by 2 and multiplied with the roundness% / 2

I think that /2 at the end is a typo, if we take it away it lines up with what you found.

Let me know if there's anything else I can do for you.

Best Regards,