I’m going to disagree with the other statement.
I hate the extra loud sound of the shop vac, so I never run it the entire time my MPCNC is running.
I typically start my cut, and then every so often I’ll crank up the shop vac and run it across the project to suck up all the dust. My shop vac has more than enough power to pull sawdust off of the board from 1-2" away. The only thing you would notice is that the shop vac is only pulling up the dust from where the dust shoe is currently going over.
I can get away with doing it this way because my MPCNC is on wheels. I wheel my machine over to the garage door and put a box fan blowing across the machine. Any fine saw dust that gets kicked up gets blown out the front of the garage. The heavier stuff that accumulates on the board is what I have to suck up with the shop vac.
I still plan on building an enclosure for the MPCNC at some point with a hole on the back so that the shop vac can pull the sawdust out of it. This would go a long way in keeping the sawdust from getting on everything in the garage.
Honestly, I never leave my MPCNC running by itself. I’m always stopping by to check on it even if I’m doing something else in the garage. Every time I stop by, I’ll run the shop vac and clean off the work surface.