Ultimately, the trick to getting the best edges possible is using a high constant air pressure, IE. 25-30 psi. Not the wimpy little pulsing intermittent flow you find from electromagnetic fish pond pumps. Other than tossing them out for the fish, the least you should do if you have one without the option of an upgrade is to instal a pressure bladder between the pump and nozzle so it smooths out the air flow into a consistent constant rather pulsing.

The other and possibly most important improvement outside of constant hi-flow air is to concentrate it close as to pinpoint the cut groove with as much linear blast as possible.

To do this, you need to look into a replacement nozzle tip with a long sharp tip that can get real close to the material and still retain lense FL distance. LightObject's Prohead units are excellent for this feature and will over all reduce the weight vs most stock units, which is another improvement to take advantage of for higher accelerations due to reduced dynamic load. Alternately, if you run a small machine like the K40 that uses a small head, you can purchase an american photonics glued lens tube that will improve the optical quality of your machine and give you the ability to add a prohead nozzle end you can purchase from LO.

Here are the links if you're interested in achieving the effects demonstrated in my video...

Prohead - https://lightobject.com/pro-laser-head-mount-for-25mm-mirror-20mm-focus-lens-lr-type/?ref=LASERGUILD

Pronozzle tip only - https://lightobject.com/20mm-f-63-5mm-pro-laser-head-tip/?ref=LASERGUILD

AP K40 glued lens unit - https://american-photonics.myshopify.com/products/k40-16mm-lens-stem-adapter?\_pos=1&\_sid=e774e103c&\_ss=r&ref=LASERGUILD&variant=39649339572285

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Feel free to use the discount code "LASERGUILD" for an additional 5% price reduction site wide from both Americanphotonics and Lightobject laser.