Tuesday, December 05, 2006
Salt Water Etching
Your link is broken and searching Instructables it appears that there are half a dozen PCB printing entries. Could you try to do the link to the one you saw again, please. :-)
For some reason the formatting for the link had a misspelling in it. The formatting word href was spelled herf. That's weird since the formatting for links is done automatically.
I wonder, though. If you do it this way you'd get copper chloride, wouldn't you? That's poisonous, too. :-(
One thing is that all the traces must be connected to the positive electrode. In other words, there must be no electrically isolated "islands" on the PCB design. That means you have to cut all those links in the circuit before you can use it. That could be minimized by sending more than one positive electrode into the tank.
Plaas, you might be right, I remember lots of deposits and discoloration...
As long as everything is calibrated and accurate, you'd just have to print the board, etch, and peel off the glue. (drilling holes either by hand or by reprap dremel mount)
I've also thought that PLA, if we can get it to extrude would be a nice substrate for circuit boards since it melts at temperatures considerably higher than that of lead/tin solder.
The power supply I'm using in my dremel-repstrap is a bit underpowered, so it's sticking every once in a while. If that gets fixed, or I overdrive my steppers, things should be good to go.
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