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Separate clearance setting for holes?
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tubes3000 3 years ago
Hi, Is it possible to set the clearance for holes independently from the general copper clearance? I want to have the copper plane free where the hole is if the pcb is mounted with washers and steel screws to prevent a short to the chassis. So far i made separate round copper areas with set to NoSolid but this is a pain in the butt. It would be nice to have a setting option in the hole attributes so one could set it for every diameter possible. Does somebody has an easier solution or is it possible to put it in the future feature list? Cheers, Olaf [https://easyeda.com/tubes3000/forum_example](https://easyeda.com/tubes3000/forum_example)
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andyfierman 3 years ago
An option is to design your own Footprint as a multilayer pad where the hole diameter is the clearance hole for the screw and the pad diameter is the washer diameter plus the accumulated slack of the screw to the hole plus the washer to the screw plus some more to make up the desired additional mechanical clearance. Then as recommend in (2.2) in (2) in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)<br> <br> find or create a schematic symbol for a hole, assign the Footprint to it then place as many as there are holes, in the schematic. If you add a net name to them in the schematic you can then add a defined clearance to them in the Design Rules which would then allow you to trade pad diameter with Design Rule electrical clearance to make up the total desired clearance around the hole
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andyfierman 3 years ago
An example: ![image.png](//image.easyeda.com/pullimage/XguJmB6Xm9i3f8POBm3v7t51YSaBPJGr3MzriFke.png)
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andyfierman 3 years ago
BTW, it might be better to change the Category of this topic to **Feature Request**. :)
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tubes3000 3 years ago
@andyfierman Thanks Andy, i will try this!
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tubes3000 3 years ago
@andyfierman It worked but i took a different approach in the end. I combined the ideas and used custom symbol and footprint but i used a smaller diameter pad and included the copper areas into the footprint set to NoSolid like i did before in the PCB. I used a pin first in the symbol to connect it to the pad and the footprint but later erased that pin so i don't have to deal with unfinished nets. It worked fine and i have updated the example for others to see. Cheers, Olaf
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andyfierman 3 years ago
"...included the copper areas into the footprint set to NoSolid..." I think you mean **Solid Region** rather than Copper Area. "I used a pin first in the symbol to connect it to the pad and the footprint but later erased that pin so i don't have to deal with unfinished nets." The Footprint creation process you describe should work without having to include a pin first. My examples only have a pin so I that can use the plated through holes as grounding or supply connection points if desired.
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