Hey CNCGeek,
there is a big difference between a workshop vacuum cleaner and a dust collection system.
- Workshop vacuum cleaners generate a very high negative air pressure but produce rather low air volume flow,
- Dust extraction and collection systems are the other way around: they generate much less negative air pressure but a very high air volume flow.
(Air pressure is measured in Pascal (Pa), Air volume flow is measured in cubic meter per second (m³/s) (US/imperial: cubic feet per minute (cfm)))
As an example, a workshop vacuum cleaner like the Festool CLEANTEC CTM MIDI I produces a negative air pressure of 24,000 Pa, but only an air volume flow of 3,700 l/min = 3.7 m³/min = 222 m³/h (= 130.7 cfm)
On the other side a Dust Collection System like the Felder AF 22 produces an air pressure of only 2,510 Pa, but a very high air volume flow of 3,100 m³/h = 3,100,000 l/h = 51,666 l/min (=1,824.6 cfm)
As many people reported here, a dust collection system is more effective for the Onefinity CNC when milling wood than a workshop vacuum cleaner. And it would also resolve your problem with the bristles: Your negative air pressure is too high. Also usually dust collection systems are quiter since they usually have induction motors in contrast to universal motors with their loud carbon-brush commutators on vacuum cleaners, which also often run on very higher speed than a dust collection system.
The good thing about dust collection systems, as they are technically rather simple, an entry price is the Harbour freight 2 hp system with its $299.99. However I would always recommend a dust collection system with a pleated polyester filter cartridge with dust class “M” (dust class “HEPA” in the U.S.) for reasons of health. Wood dust is cancerogenic.
Conversion
1 l/min = 0.0353146667 cfm
1 cfm = 28.316846592 l/min
1 m³ = 1000 dm³ = 1000 l
1 l/s = 60 l/min = 3600 l/h
1 m³/s = 60 m³/min = 3600 m³/h