That's interesting . I have this type of squirrel fan looking thing that I use to evacuate fumes from my laser .I'm planning to put a chip collector in line before the bag. I now have a squirrel cage rated @ 1800 CFM. Would it benefit to add this in line to add a bit of oomph to the system?
I agree. But the closet would have to be well sealed, in order to maintain the reduced pressure. My hunch is that even the leaks around a standard closet door would be enough to bring the pressure in the closet back to ambient. I'm also not sure how well the original motor+fan will handle the increase in flow speed.Y'know, enclosing the DC system in a closet arrangement, and putting the exhaust fan on the closet to greatly reduce the air pressure on the outflow side of the system might actually help with the efficiency, by reducing the backpressure(?)...
Rob, the first DC system I set up had the fan inline with the suction where everything went through the fan into the cyclone. Like you said I could hear a large chip or screw hit the fan.Tom, if someone has the energy to experiment around, I'm all for them going for it. For myself, I'd rather spend my free time doing woodworking. But then I'm not retired, yet, either.
The link on the impeller issue is pretty interesting...thanks for that.
Adding a chip collector will increase the drag (or pressure loss) in the system, no matter how well sealed it is. How much, I have no idea. I might take the time to build a simple manometer to see the difference. Regardless, I agree that it's well worth it. Right now, I cringe every time I hear a chip hit the impeller. So I've ordered the drum you found from amazon.
Wow, I really like that ply insert in the chip collector. The heavier chips and particles are going to spin to the outside and drop through the cut away.I have a separator upstream of my HF dust collector. As long as I remember to empty the drum every now and then, the system works pretty good.:surprise::grin: Good enough that I don't think about it.
I only have two 4 inch ports. One is plumbed to the table saw. The other comes off a "Y" in the line to provide a connection for a hose that I connect to the mobile tools (drum sander, planer, jointer).
Note that I added a Wynn cannister filter to help capture the fine dust.
The drum is translucent.:surprise: I can see the level if I look close at it. I bought it specifically for that reason.Wow, I really like that ply insert in the chip collector. The heavier chips and particles are going to spin to the outside and drop through the cut away.
One thing I've thought about cutting a 1X6 strip into the side of the chip collector and putting in a plastic window so I can see clearly when it's full without having to open it. Or, I saw that someone put a dowel through the top with a pad on the bottom so you can rest the foot on top of the sawdust. Mark the stick at the full level. A grommet in the lid would seal the top of this probe but let it slide. Every time I open the chip collector I know some sawdust is going to launch. I think the stick approach sounds more practical.