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strange PCB print error

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Neegu0Sh 7 years ago

Hi, I have a strange problem with a PCB I received recently (https://easyeda.com/editor#id=258bfeb9cae04acc8f60f8c3210fad20|fa47dea4c3514aa68e8eaebce54397db). This is how it should look like (from EasyEDA PhotoView): ![Screenshot][1] This is how it actually looks like: ![Actual PCB photo][2] (please ignore the cut traces - I tried to narrow down the problem by cutting off parts of the circuit). As you can see the seven upper pads for the U_MODEM part are slightly displaced to the right, which resulted in a short-circuit with a trace going from north to south on the PCB. The lower-most pad of the U_MODEM is at the correct position. Did I do something wrong here, or is this some sort of bug? I did put this in the "bugs" topic because I think that at least the Photo View should match the actual final PCB. Thanks & Regards Simon [1]: /editor/20170305/58bb5a997d621.png [2]: /editor/20170305/58bb5a4b00410.jpg

Comments

Neegu0Sh 7 years ago

Here is a "better" picture: ![Better picture of PCB][1] [1]: /editor/20170305/58bb5c0c08c4e.jpg

andyfierman 7 years ago

Sorry but your link is not public: https://easyeda.com/editor#id=258bfeb9cae04acc8f60f8c3210fad20%7Cfa47dea4c3514aa68e8eaebce54397db ![enter image description here][1] To investigate this we need access to your project or a clone of it. Please share it publically or with support. https://easyeda.com/Doc/Tutorial/share.htm#Sharing https://easyeda.com/page/contact Thanks. [1]: /editor/20170305/58bbeb48a7c3d.png

Neegu0Sh 7 years ago

Hi, Sorry for not having the permissions correctly set. I hope I managed to fix this now. Thanks & Regards

andyfierman 7 years ago

Hi Neegu0Sh, I can confirm that this appears to be a bug. When I copy your project and then generate the gerbers for the PCB, I see the same offset in the pads on the right side of the `U_MODEM` device footprint as shown in your actual PCB.

Neegu0Sh 7 years ago

OK. Please let me know what can do to help you. Once the bug is fixed I would like to modify the PCB a bit, and then order the new version. Thanks & Regards Simon

dillon 7 years ago

Sorry, We forget to add this bug to TODO, but it seems your project is private. Can you share it with me? dillon@easyeda.com Thanks

dillon 7 years ago

Hi, We have found your package's issue, your `RFM26W-SMD`'s center point is not the pad's center, I tried to change the hole size to 1mm, you can see the hole is offset the center of PAD. Do you use any API to create such pads? There are 3 ways to fix your design. 1. You can delete the bad pads at the package, then import change to your PCB. 2. Change the pads' degree from 180 degree to 181 degree, 1 degree will no affect your PCB. 3. Wait for some time, we will release a hack way to avoid your issue. I think way 2 it is easy, way 1 is better, you may need this package again. ![enter image description here][1] ![enter image description here][2] [1]: /editor/20170308/58bff8dddcbaa.png [2]: /editor/20170308/58bff791248e5.png

Neegu0Sh 7 years ago

Hi Dillon, I did not create the package myself. I just found it among user contributions and saw that it matches my radio chip. So I do not know how the original author created the package. I will try to fix it. Thanks & Regards Simon

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