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Hello Øyvind,
Have I understood this correctly: You're using a pen plotter to print directly on the PCB ?
Yes.
Is this the etch pattern or the silkscreen, and which type(s) of pen(s) are you using ?
The plotter draw directly the etch pattern on the PCB.The pens are home made: Old HP pen with a shorted and polished thin disposable cannula glued inside. The pen is open top, one drop of ink is enough for the etch pattern. A thin copper wire hang in the cannula and brakes the ink flow.
Regards, Andreas
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