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How to construct a Ring Pad without a gap?

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chinrest 2 years ago

I ordered some boards that are fine except for one detail. There is supposed to be a ring-shaped pad with uninterrupted copper, but all of the boards have the same gap in the copper. I used a user-contributed footprint, and the ring pad is constructed with a polygon, as are many other similar footprints. The gap appears in the exact same place as an extra circle in the polygon shape. What's strange is that the gap doesn't show in the top layer, but it does show in the top solder mask layer. I have looked through several user-contributed footprints of similar types, and they all seem to have this issue. My question is: How do I construct a ring pad without a gap?![IMG_5345.jpg](//image.easyeda.com/pullimage/gLP3HuRqmXmaZcEzkmvXXxB5jZtGdeO92cf2X3zA.jpeg)![Screen Shot 2022-03-22 at 11.05.30 AM.png](//image.easyeda.com/pullimage/exjyqhSww0igvMmcCA6UjPjcn1CfGuRJ5zvIiRey.png)![Screen Shot 2022-03-22 at 11.06.37 AM.png](//image.easyeda.com/pullimage/34K0pqEztTCklWoVmbbvrsQGtaWhyNKiI07PsycC.png)

Chrome 98.0.4758.102 OS X 10_15_7 EasyEDA 6.5.1

Comments

andyfierman 2 years ago

![image.png](//image.easyeda.com/pullimage/CiM9vvMUK0X4O7mq2Vv2L7bJ357ASXsmODchCY9M.png) [https://docs.easyeda.com/en/PCBLib/PCBLib-Create/index.html](https://docs.easyeda.com/en/PCBLib/PCBLib-Create/index.html) and: [https://docs.easyeda.com/en/PCB/PCB-Tools/index.html#Pad](https://docs.easyeda.com/en/PCB/PCB-Tools/index.html#Pad)

Chrome 99.0.4844.82 Windows 10 EasyEDA 6.5.1

chinrest 2 years ago

@andyfierman I think those options all assume that the hole is the same size as the ID of the copper ring. I need to specify a copper ring OD, ID and a separate hole diameter, or the hole can be just added separately from the ring pad. In my case, the hole is quite a bit smaller than the ID of the copper ring.

Chrome 98.0.4758.102 OS X 10_15_7 EasyEDA 6.5.1

andyfierman 2 years ago

@chinrest In that case you need to make the ring out of two overlapping arcs and not a single circle. [https://docs.easyeda.com/en/PCB/PCB-Tools/index.html#Circle](https://docs.easyeda.com/en/PCB/PCB-Tools/index.html#Circle) Then for use in a Footprint, select them and do **Convert to Pad**.

Chrome 99.0.4844.82 Windows 10 EasyEDA 6.5.1

chinrest 2 years ago

@andyfierman I'm not certain what you mean by overlapping. Do you mean one arc superimposed over another? Also, if I select more than one object, I cannot convert to a pad. I get the error message as follows: ![Screen Shot 2022-03-22 at 5.06.13 PM.png](//image.easyeda.com/pullimage/S8udJnIALuEh5RTxu6TTo8jP7snqxPrJUOdW0bxl.png)

Chrome 98.0.4758.102 OS X 10_15_7 EasyEDA 6.5.1

andyfierman 2 years ago

@chinrest, 1. Two 180 degree arcs so that the endpoints coincide. 2. Select each in turn, do Convert to Pad then (as in your screenshot) assign both resultant pads the number 3.

Chrome 96.0.4664.104 AndroidOS 10 EasyEDA 6.5.1

UserSupport 2 years ago

Hi Use two arcs, and convert them as Pad

Edge Chromium 99.0.1150.46 Windows 10 EasyEDA 6.5.1

andyfierman 2 years ago

@UserSupport, @chinrest, It's also important to assign the same pad number to both of the resultant pads to avoid DRC errors. :)

Chrome 96.0.4664.104 AndroidOS 10 EasyEDA 6.5.1

chinrest 2 years ago

That's getting closer, but there is still the problem of the solder mask at the ends of each arc. Is there a way to edit the solder mask to not do this? It will still have gaps.![Screen Shot 2022-03-23 at 7.19.33 AM.png](//image.easyeda.com/pullimage/cXvcIrLpZaTR8YN3yFVXuG7VbfYVoI5w7eFuYEtp.png)![Screen Shot 2022-03-23 at 7.19.48 AM.png](//image.easyeda.com/pullimage/54NywEbXujDbbCNvyEz3GiQSAP1OZH9DDMtRkBul.png)

Chrome 98.0.4758.102 OS X 10_15_7 EasyEDA 6.5.1

andyfierman 2 years ago

@chinrest, I doesn't work like that. Here's an example of a footprint made with several overlapping pads: [https://easyeda.com/editor#id=!9d84ff54bb094c81a323d3fb329a10ca](https://easyeda.com/editor#id=!9d84ff54bb094c81a323d3fb329a10ca) Despite it being shown in the Footprint Editor, this does not have any soldermask overlapping or crossing the pad area: ![image.png](//image.easyeda.com/pullimage/0CWi4L4pK0ik4rz2Ig9UvT4N95fU3FLPYcaen2Ao.png) ![20220323_133217.jpg](//image.easyeda.com/pullimage/FicnisQnuyKqsD7bi6zzw1jKsOfofbkRnEZh5yPr.jpeg)

Chrome 99.0.4844.82 Windows 10 EasyEDA 6.5.1

你现在访问的是EasyEDA海外版，使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程，下载后在https://lceda.cn/editor 打开保存即可。
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