Generally speaking place as many vias you can to connect the two ground planes. This method is called via stitching and is used to minimize noise interferences and make a solid ground connection between the two ground planes. It's a good practice. So make use of the non used space and put a bunch of vias there
I won't be the first to thank you for this tutorial. I've already used this technique in a dozen designs, or so. This seems to me like a more practical solution than the classical "traces on top, ground plane on the bottom" one. Of course, it still depends a bit on how close the via is to the obstructed current. In essence, you will not get the highest performance by randomly sprinkling vias?
thanks friend. to create the gcode you have to select one polygon at a time right? I noticed that the file is created based on the selected polygon. I don't know if I mean well
Your method works great. I want to also panelize the board by making copies of it, but I discovered that group copy won't copy the polygons. Any ideas?
Thanks! this was very usefull, I have a question, say I have a portion of my board where I want the spacing to be larger, like input conectors with higher voltage. Can I have different spacing within a ground polygon? Because there are some areas that become isolated from ground if I choose a bigger spacing. So i would like a bigger isolation just in certain areas of the board.
Anybody here to answer a quick question??? OK, so after I created my ground plane and hit the ratsnest button, my ground plane appeared on the layer on which I drew it. (I used layer 2, which is an "inside" layer, but I'm not sure it matters.) Then when my designed appeared to be complete, of course I saved my work. The apparent problem occurred the next time I opened the file to double check everything one more time. When I did that, the ground plane did not appear. Rather only the outside edge or border of the polygon showed up. I then had to hit the ratsnest command again, and there it was. Question: Is my ground plane saved in my job file, or did I miss a step before I saved and exited my work? I'm very concerned that my boards won't get manufactured correctly!
Thanks for the video! have a question regarding the polygon tool. As i attempt to start drawing the polygon, i can't exactly select the top corner of my pcb to start drawing from there. Eveytime i click the corner, the dot appears a bit displaced. This however only happens with the the upper part of the pcb. Any idea why this happens?
I haven't used EAGLE for years, so I am not sure what is happening. (I use KiCad now.) But the polygon can be larger than the board, so it doesn't really matter where it starts.
hi this is great. This is probably a daft question but why use a ground plane. I had made a board and just wired the ground around the circuit. Does the ground plane mean eliminating lots of extra unnecessary GND wiring? Especially if I relabel my negative net to GND
Ground planes improve a circuit's signal integrity. By including a ground plane, you provide a better return path. The parasitics (resistance, capacitance, and inductance) of individual ground traces connected together is much higher than a singular ground plane. In high frequency circuits ground planes are used to control impedances of a trace and as a limited shield from emitting EMI. From a PCB production perspective, they greatly reduce the amount of copper that needs to be etched (or milled) away.
Nice tutorial. One question, though. Let's say that we have a third polygon with a different signal for cooling a LDO. How do you separate it from the ground ones?
nice tutorial.....and nicely done.....i am still facing a problem after pouring. after the last step after pouring top and bottom layers when i save my brd. And then open it again pouring is gone only polygons are left behind and then i have to again hit ratnest button again.Same happens every time i open and close board file any remedy?
I always makes polygons and after draw pcb. Why you told ''we need to make polygon after drawing pcb'' ? First polygon, second draw pcb is more easy? I there any technical problem with it?
Hi! I've wondered about one thing: After I've defined a polygon, renamed it to GND (for example) and did ratsnest, the design is pretty much over, isn't it ? If I do little changes to a wire, the polygon plane won't change as well. Is there a way to get around this? I think it's pretty inconvenient to undo all your steps to the point of GND-plane definition, do the change to the wire, and do the plane definition again.. Kind regards, Tom
No. That has never been my experience. You should not have to redefine the plane. Each time the ratnest command is run, the plane will be redrawn. Which means it should accommodate your changes. If not, something else is happening. Keep in mind that if you do not have "orphans" enabled, it is possible to draw traces that eliminate section sof the plane. So you have to enable orphans in the plane dialog or you need find a way to "reconnect" those orphaned areas to another ground reference. I typically put GND on both the top and bottom, so an additional ground VIA usually fixes it.
I think that for VCC is the same, but instead of naming polygon as 'GND' you name as 'VCC' or other name that you have for your vcc, use the same name for vias.
