Check the specs in the GRS manual, but I believe they recommend about 10psi more from the compressor than their machine requires. In other words, you should always have a little more air available than the engraving machine needs. I think i keep mine at about 45psi.
Onglettes are one of the most difficult gravers to sharpen and do consistently. Id strongly recommend picking an easier battle at this point in your journey until your skills are more advanced and you have a specific need for onglettes.
Keep in mind you also need a polished transition from the base of the heel to the graver shank. If the face and heel are nice n shiny, but the trailing edge of the heel meets at a rough edge with an unpolished shank your cuts may have been momentarily bright then get wrecked. The trailing edge...
It could probably use what auto mechanics call an “Italian tuneup”. Floor the pedal and turn the Strokes Per Minute knob up & down a few times for a minute or so. It won’t hurt anything and might clear whatever’s making it buck and stall.
Yeah, but…. As Kevin rather poetically explained, a gun is a dynamic canvas with a clear “force vector” moving in a forward direction. There are also other traditional conventions in our art, such as north/south timed screws, checkering, etc.
Having said that, one needs to know when to “break...
And by “radius the face slightly”, Mike means side to side across the face, not top to bottom. You need to sweep the graver thru a small arc while holding it at the proper sharpening angle. It doesn’t take much.
You can make a smoke print that will be exact. Instead of putting the tape on paper, stick it to some sort of clear film- acetate, mylar, whatever. Be sure to clean the inlay cavities well after the smoke.
Like people who might be so into music they can’t appreciate silence. Or someone who thinks a quiet moment in nature, with some birds singing or the breeze in the trees, could always be “improved” with a symphonic soundtrack. Yeah, they p!ss me off…
Clients who need every square millimeter covered with something, anything, and cannot appreciate the occasional bit of well polished metal, are vulgar, uncultured slobs.
My 2¢