Wow Matt!
My little experiment pales by comparison!? That is some serious work.? To be honest, I mostly did mine to see if it would work.? No drilling, just a couple of single layer surface mount boards
There were really only a couple of things that caused me fits:
- I drilled the of-the-shelf brass nozzle just far enough from the back end to keep the scribe from falling through.? Took two tries.
- I really wanted a small spring to put behind the engraver tip, but couldn't find one at the time, so I used the RTV in the back of the hole.? Made the flatness more critical.? Some time later I found that the flint spring from a disposable lighter would be much better.
- The carbide point on the engraver was too sharp!? I was scribing through the copper at first.? That wouldn't seem like a problem except that the extra drag ruined the line resolution and accuracy.? Dulled it a bit on a diamond lap.
Again, my admiration and congratulations on the great work you did!
Take care sir,
Brent
Brent DeWitt