Thread: Table saw motor problemthmi

Am no subject expert, but Dyson vacuum cleaners (and vacuums) rely on high velocity air, which is great for sucking objects that a relatively close to the inlet (1-2cm). The benefits of this greatly diminishes the further away the object is.
Dust extractors are all about volume of air moved rather than velocity. I'd be interested in the energy required (or extent of modifications) to create the same effect as a dyson in a cabinet.

I suspect by the time you create something that close to the blade it might hinder some of the saws functions ie raising/lowering of blade etc.

Originally Posted by tonzeyd

I'd be interested in the energy required (or extent of modifications) to create the same effect as a dyson in a cabinet

The Dyson reference only related to the possibility of significant amounts of experimentation. The only similarity to a cyclone vacuum system is that velocity is as important a factor as volume.

mick

Originally Posted by Glider

I would be very interested to learn how effective the air inlet port idea has proven to be. BTW, I did not present the idea as original to all, only to me.

Sure, I was just commenting on what has been going on in the forum.

The Benoulli effect is not intended to drag more air through the blade table slot. If I can induce a cylindrical stream of high velocity air across the cabinet, its inherent low pressure will hopefully scour the surrounding dust laden air into the outlet. The two key factors are airspeed and volume. I would use flat or circular blades on the inlet side to induce as much laminar flow into the incoming stream

As the flow will already highly turbulent, adding blades to try and remove turbulence will most likely impede the flow because there will not be enough travel path length to establish a laminar flow inside a cabinet.

and probably look at some internal mods to reduce the internal volume of the cabinet.

That's worth doing if it can be done easily.

After getting sufficient air into the cabinet the next most important thing is getting the air out. This is where a Bell Mouth hood (BMH) comes into its own.
Head over to the dust forum to see what these things do.

It only took James Dyson five years and several thousand prototypes to perfect his idea, I might add.

We have a Dyson, a supposedly pet friendly cordless model and even though SWMBO likes it I think it's very limited in what it does especially given the price of it. I don't think two border collies should be beyond it's bounds of capability but if it wasn't for the Rhoomba the Dyson would choke after 2 minutes of use. The dust chamber is too small and gets choked with half a handful of dog hair. The Rhoomba is much more effective but it too needs a dog hair service on its external moving parts around once a week.