Originally Posted by Robin Hewitt  apologies for butting in, I'm new here and just having a look around...
Constant pressure works fine on our Borries marker which uses compressed air to push down, but that doesn't spin the tool so it doesn't drill. Is this spring really weak or is there some kind of depth stop ground in to the tool tip? How come it doesn't dig in?  |
The spring is somewhat weak, but there is no depth stop to keep it from digging in. So yes, it can and will dig in if it pauses over an area. The only way to solve that is to keep it moving at a steady IPM and RPM, which incidentally is how to control the depth - slower IPM and/or faster RPM and it engraves deeper. I know it sounds like a pretty fly-by-night solution, and it really is, but it is actually quite amazingly consistent once you figure out the settings.
The big downside is the trial and error to figure out the speed/material/depth settings in the first place, but in my book it still beats the other alternatives for rotary engraving for right now as it costs way less than 1% of the nearest "correct" rotary method to implement. That and much of what I want to do can't be done by non-rotary engraving.