Excessive dust!

We are getting a lot of excess dust when cutting or engraving on wood. We have purchased and installed an inline exhaust fan to assist the built in fan, we are currently venting out a window. Any suggestions would be greatly appreciated.

Hard to know what you mean by “excess” dust. The laser ablates the wood material and dust results. Maybe provide photos for reference. Also, have you changed wood suppliers recently? Have you changed settings? Have you cleaned the air assist fan?