Came in today to see Big Thunder out of service - decided to do some diagnostics…
I verified the mirror alignment on all axis - it was perfect.
I cleaned the lens - it was dirty
The main problem was the air. It appears the valve is broken and was not open all the way causing the laser to smoke a LOT. I got it to open all the way, probably needs to be replaced.
I did a bunch of cuts on 3/16 acrylic and it was cutting perfectly.