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How to add pullback to fiducial marks on PCB?

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aseredy 6 years ago

Hey All, Wondering how you go about adding a fiducial with pull back? I can add a fiducial, but I can't seem to control the pullback. I searched but didnt come up with anything useful. Can I edit the solder mask layer? I'm making a very dense LED array and Want to add two fiducials to help in keep accuracy high during assembly. Thanks! Andy

Chrome 56.0.2924.87 Linux

Comments

terjekbela 6 years ago

I think you need to turn on the soldermask layer (the cog in the layers list), and put (copy) the fiducial to it. The soldermask layer is interpreted as a negative...

Chrome 67.0.3396.62 Linux EasyEDA 5.5.11

aseredy 6 years ago

Edit: I tried to make a non plated circle under a smaller plated one, but the gerber viewer doesnt represent the non plated circle... Maybe that's just graphical?

Chrome 56.0.2924.87 Linux EasyEDA 5.5.11

aseredy 6 years ago

@terjekbela Thanks! I tried to add to the solder mask layer, but I'm unable to assign the shapes to that layer. It only lets me assign to Top, Bottom, and Document... but not solder mask... I'll keep trying. maybe need to restart the EDA to pick up the layer change? Thanks!

Chrome 56.0.2924.87 Linux EasyEDA 5.5.11

terjekbela 6 years ago

@aseredy yes, I've seen that problem, too... restart will help

Chrome 67.0.3396.62 Linux

aseredy 6 years ago

Thanks! Restart did help, but I can only add rectangles and solid regions, not circles. I added a square onto the solder mask layer, but it treats it as both the etch layer and mask layer. So I end up just making a non-masked copper square. hmmm

Chrome 56.0.2924.87 Linux EasyEDA 5.5.11

aseredy 6 years ago

@terjekbela Wait, I think it's working. Loading it in a gerber viewer seems to show the copper circle and solder mask as two separate objects. The Picture Viewer in EasyEDA seems to confuse the two. Thanks for the Help. I'll order some Test PCBs to confirm.

Chrome 56.0.2924.87 Linux

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