As of right now, I’m certain that nobody has these capabilities supported in laser software. However, I’ve noticed some of the newer machines simply having a focus lens kind of hanging mid-air via a bracket, with air assist be via some complicated curved tube.
Additionally, I watched some other K40 videos with regards to flame-polished edges, etc.
This got me thinking: Would putting a lens turret under the last mirror be worthwhile? You could get a multitude of focal distances under there (maybe it’s only worth putting 2 or 3), and then use your short-focal distance for engraving, and swap over to a long focal distance for cutting the piece out. Obviously this would all have to be paired with a stepper-adjusted table and likely a Z-probe.
Additionally, even when you’re “not using” air assist, depending on the air assist style (talking about the conical types here) - you may want to leave the air running at a smaller flow rate, but still running. Then on a different piece of the part you may want an increased flow (verses simply on/off).
Is there a good solution currently for digitally controlling an air flow valve?