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[JeffVolp]

I was testing a batch of XTBM-Pro X10 signal analyzers, and one started to indicate errors.  The configuration I use is a remote RR501 and XTBR near the panel on the opposite phase from my lab with no signal coupler to deliver very weak signals for testing.  Normally that gives .06Vpp from the RR501, and about .50Vpp from the XTBR (again, on the opposite phase with no signal coupler).

The XTBM-Pro was either indicating a BSC (Bad Start Code), or the signal level was just .02Vpp when it was able to decode the command.  That is REALLY down in the mud.  I could faintly hear a vacuum cleaner running in the distance.  Our Dyson was plugged into the same circuit as the RR501, and was loading down its signal by a factor of 3.  That is a pretty serious signal sucker.

It is probably rare that a vacuum cleaner will be running simultaneous with X10 transmissions, but this might cause random errors that some folks experience.

Jeff

[Brian H]

Thank you for the information.
I wounder if they may have a power supply in them.
Some of the sales illustrations look like they may have a high speed motor in them.

[JeffVolp]

I wounder if they may have a power supply in them.
Some of the sales illustrations look like they may have a high speed motor in them.

I don't think there is any power supply.  Yes it has a high-speed motor that makes a horrendous amount of noise.  That motor crapped out on our last one.  Maybe it has a capacitor somewhere to deal with brush arcing.

Jeff

[dave w]

Some of the sales illustrations look like they may have a high speed motor in them.

Not to get too far off topic, but the Dyson cordless "stick vacuum" claims to have a 10,000RPM "digital motor". A digital motor???  I wondered if Dyson's "digital motor" was nothing more than what would be called a brushless DC motor which (I believe ) is essentially a servo motor with built in chip to sequentially drive the coils. If it IS a brushless DC motor, that cranks 10k RPM with a lot of torque...I'm impressed. Perhaps Dyson isn't just a ridiculously priced Bissell. Anyone know what a "Dyson digital motor" is?   

[Knightrider]

Anyone know what a "Dyson digital motor" is?

I have wondered that myself.

[beelocks]

Dyson vacuum cleaners suck, mainly because they don't suck.
They probably call it "digital" because of all the single middle digits that they get shown.

[JeffVolp]

Dyson vacuum cleaners suck, mainly because they don't suck.

We also have several others that had high reviews on CR or Amazon, but she prefers the Dyson for floors and the Eureka for smaller jobs.  The Hoover is backup for when this Dyson fails.  Maybe a Shark then...

Jeff

[toasterking]

Anyone know what a "Dyson digital motor" is?

From what I have read in the past about the Dyson vacuums, they use a brushless DC motor.  It's impressive to me that they can get that amount of torque out of such a design, but the technology itself is of course nothing new; it's all marketing.  Apparently the very common coil switching method used to accomplish that is now embodied in their exclusive "digital pulse technology"!!

And did you know that this amazing futuristic technology has zero carbon emissions?!  Amazing!!
http://www.eevblog.com/2010/12/13/eevblog-132-delusional-dyson-marketing/