Did I Kill My Cyclone Motor?

[LCHIEN]

What I've observed when people test a dust port is that they tend to place their hand several inches from the port. Then they gradually move their hand closer and closer to the port.

The first step allows them to determine (roughly) the amount of air flowing. The second step allows them to determine (again, roughly) pressure.

I don't know if this is the brain protecting us from unknown dangers or if people actually subconsciously understand the difference between CFM and static pressure.

However, I think I've also noticed that when people ask in these types of forums whether they will get more "suck," they want to know if either will increase. Of course, for woodworking, either is welcome. More CFM is great for big machines. More pressure is great for machines with small ports.

And, when their hand gets closer partially covering the duct opening and the air starts roaring and whistling in turbulence they think its working harder but in reality its working less (and the motor current goes down).

[Jeffrey Schronce]

Wilke replaced the motor while I waited. Took about 45 minutes, checked switch, etc. Interestingly, this motor sounds different than the old one. From the beginning, when I turned the old one off it . . . . well how to describe it . . . it took a really long time to wind down, like it was in free spin mode (made up term) or something. This motor almost seems like it has a brake on it. Cycles down much quicker.

Running cyclone with dust bin lid and stopping loss of pressure there definately increased the amount of CFM or static pressure or whatever techinical term is needed here. Before I had a very heavy duty 6" x 10' flex hose on the end connected to jointer hood. When I turned DC on it did not compress the hose. Now it compresses it quite a bit. Just more incentive to get as much flex hose out of the equation as possible.