Pad size

On 10.08.2016 00:20, Iosif Gross wrote:

New to eagle, I succeed to make a schematic and a board, my own library.

While trying to custom my packages pins I am getting square, round, long

options

My problem is I don't understand how to get the long pad shorter than

round*2

For example I want to make a pad of 7056 mill but I am getting 11256.

Any advice will be appreciated

The builtin "long" lad is legacy stuff. You better make a round one and

draw a custom shaped polygon around it (in lib package editor). As long

as the polygon is surrounding the center of the pad, it will merge with

the pad. Of course you have to draw both bottom and top polygon pad.

Polygons can have arc sides to make the roundness you want. If you are

new to making polygons, you may need to practice this a bit.

Beware, Eagle does not support slotted holes well (yet;as by version

7.x), but there are ways around it if you know the manufacture process well.

Thank you for the advice Morten Leikvoll

Started to work on it, can make polygons already, I just have problem to

save it under an other name than started with. Will continue the

experiments

Best wishes

Joseph

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

I succeed to draw two polygons I wanted as pads

I would like to save them as pads and use them for some of my packages.

Still don't understand:

• How the polygons are merging with the pad

• How to save them as pad

• How to use them when designing a new package

Will appreciate any help

Best wishes

Joseph

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

Hi Joseph,

To answer your questions in order:

1.So long as the polygon surrounds the pad then EAGLE automatically merges these. Note you need to also put polygons on the mask layers otherwise you'll have the right shape copper but the mask will only be where the actual pad is.

2. You can't save them as pads to use over and over. You create these custom pads as part of creating a footprint for a particular package.

3. See 2 above. If you want to reuse custom pads from an existing package you'll need to duplicate the existing package or copy it into a new library and then edit it to your requirements for the new footprint.

Best Regards,

Rachael

Thank you for the replay Rachael

Will continue the experiments

Best wishes

Joe

Very frustrated with this pad issue

I know I am new here, cant ask a simple way to make a pad?

Like defining length/width and hole?

Best wishes

Joseph

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

On 13/08/16 00:55, Iosif Gross wrote:

Very frustrated with this pad issue

I know I am new here, cant ask a simple way to make a pad?

Like defining length/width and hole?

 

If all you want is an elongated through hole pad, the long hole pad

works. Its limitation is that the ratio of length to width (and offset

of the hole) are defined in the DRC rules for the board, not

individually per pad. If all your long pads want to be the same shape,

that will work for you.

If you want something more detailed or more controllable, use the

polygon method Morten recommends.

Thank you for posting CadSoft Guest.

I am not talking about individual pads

I am talking about all the pads the same in a component:

Like let say 18 Pin DIP, all pads 56/70 mill

Designing a board with long pads of 56/112 mill makes a lot of limitations to the board.

I tried the polygon, is a very time consuming approach

Best wishes

Joseph

Hi Joseph,

I agree there could definitely be improvements made here. It does get quicker with practice and as you learn little techniques for doing this.

When you say the polygon approach was time consuming, what was your process? It'll be slower for the initial pad within the package but once you have done one pad its just a matter of setting the grid to the pin pitch and then doing a group copy of all the parts of the custom pad and pasting it for each of the pins on the first side, then setting the grid to the pitch between the two rows of pins and doing a group copy and paste of the whole first row to create the remaining pins. Then type NAME and press return and go round clicking each pin and naming it correctly to ensure all the pins are in the correct order.

Best Regards,

Rachael

Thank you for the replay Rachaelp

I have done what you are proposing and made an 18 pin package with pads of

70/56 mill

1. I didn't succeed to copy the pad, top, bottom, top solder mask, bottom

solder mask polygons all together so I done it one by one

2. In the saved package, is still see the polygons and the pad and not a

pad of 70/56 mill

3. Tried to replace the package of the PIC18F1847-I/P in my drawing with my

new package, followed the manual step by step with no success.

4. Tried to add the package to the PIC18F1847F-I/P without success.

In general, the manual assumes that you know a lot of things already, don't

have step by step procedures.

I am using WinQcad for many years, was/I am very happy with the software

but I suppose you know they existence ended a few years ago and I found

Eagle to be the most affordable and serious medium level SCH/PCB software,

also used by Elelent14 and SpakFun.

I have a total of some 50 Packs I am using and would like to have them in

Eagle, most pads are 70/56 mill and round 56 mill (given by Eagle)

Best wishes

Joe

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.