Simple polygon line width question

On 03/26/2013 08:15 PM, RayA wrote:

I draw a polygon with a line width of 10 mils, and fill it for a ground

plane.

The line is 20 mils from the edge of the board.

Will the edge of the copper on the fabricated board be 20 mills from the

edge of the board (at the CENTER of the line), or 15 mils (at the EDGE

of the line)?

 

Thanks for the help.

The answer may be in the manual, but I didn't find it.

Ray

 

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What you see is what you get. What you draw is almost what you get but

DRC setting will mmake adjustments. I draw the polygon beyond the board

edge and use the DRC setting to adjust the hole and edger clearance.

Paul

Thanks Paul. I see how that method would also work.

And I assume that "What you see is what you get." means that, per my question, the copper would be 15 mil from the board edge.

Thanks,

Ray

On 03/26/2013 11:46 PM, RayA wrote:

Thanks Paul. I see how that method would also work.

And I assume that "What you see is what you get." means that, per my

question, the copper would be 15 mil from the board edge.

Thanks,

Ray

In 99.9% of the cases the gerbers will matches what you see in the board

editor. The main reason to view the gerbers is to verify you have the

correct layers in your cam job.

A 10 mil wide at 20 mil from edge will be 15 if the DRC setting is less

then or equal to 15 mil.

Paul

On 03/26/2013 10:42 PM, Paul Romanyszyn wrote:

On 03/26/2013 08:15 PM, RayA wrote:

I draw a polygon with a line width of 10 mils, and fill it for a ground

plane.

The line is 20 mils from the edge of the board.

Will the edge of the copper on the fabricated board be 20 mills from the

edge of the board (at the CENTER of the line), or 15 mils (at the EDGE

of the line)?

 

Thanks for the help.

The answer may be in the manual, but I didn't find it.

Ray

 

--

To view any images and attachments in this post, visit:

http://www.element14.com/community/message/72778#72778

 

What you see is what you get. What you draw is almost what you get but

DRC setting will mmake adjustments. I draw the polygon beyond the

board edge and use the DRC setting to adjust the hole and edger

clearance.

Paul

You can place the line of the polygon right on the edge of the board (or

even over it).  The copper fill will pull back from the dimension line a

distance as specified in the DRC->Distance->Copper/Dimension value.

Having the polygon not exactly on top of the dimension line makes it

easier to grab and move.

    - Chuck

I just thought, actually a "nice-to-have" (but low priority since there is a workaround) feature request would be the ability to assign multiple layers into a group, and then be able to draw lines or polygons on all the layers in a group simultaneously.

A use-case for this is (say) when defining keepout regions on the edge of a board (e.g. if the board is going to slide into a slot in an extruded box along just two edges) then I tend to draw a slim rectangle at each of the two edges with tKeepout, bKeepout, tRestrict, etc., all on top of each other. In this case, I'd call my group 'totalKeepout' or something.