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We developed an alternative method for making PCB vias through-hole using a robot. There are several commercial products for making DIY PCB vias. Some based on special pins made for this purpose but they are ugly, cost money and difficult to install. Others methods are based on conductive epoxy which also is expensive and resistivity is not good. Electroplating is the method used by the PCB industry. There are on the internet some interesting experiences, but all of them require special equipment ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/making-pcb-vias-using-conductive-ink