Ian,
I've done a lot of that type of work.
As LJ says, if the material (and/or the table) isn't completely flat, all the King's horses won't give you a consistent depth of cut.
To make life easier, by all means, use a sacrificial piece of thin engraving stock, over the surface of your leaded brass.
Using a nose depth regulator, you'll get a consistent depth.
Alternatively, I've used a layer or two of "light tack" masking tape, in place of a sacrificial sheet of engraving stock, with good results.
If you use tape, you'll want to make sure the downward pressure of the spindle is on the light side, but heavy enough not to float. David "The Stunt Engraver" Lavaneri
DGL Engraving
Port Hueneme, CA |