I finally got around to buying a California Air Tools 4.7 gallon compressor (https://www.amazon.com/gp/product/B07CKRLKM9). My idea was to replace my existing 6-gallon pancake compressor as well as having some more air to the laser vs the aquarium pump. Even though this is just a “Quiet Flow”, not “Ultra Quiet”, the noise is probably about the same as the aquarium pump. A quick test cut was much cleaner than before.
Since I want to use the compressor for the shop as well; the Ultimate Air Assist doesn’t work for me since there is a constant drain on the air for engraving mode. I got a “5/3” valve (https://www.amazon.com/gp/product/B019PTHS7Y) which has A/closed/B positions and modified the circuit to:
With no power to the laser, or with the laser idle, the valve is in the middle/closed position. The status signal opens the valve to the path with the flow restrictor in it. The wind signal breaks the path to status and activates the valve to the path with the full flow. The relay is wired so only the A or the B side can be energized, not both.
Waiting for all the various other components to get in to actually do the work.
EDIT: Corrected link to the right style valve.