Vacuum Cleaners Discussions

iMacDaddy,

Thank you for the review, pics and video!

Viewing your movie in slow-mo (@ counter 00:42 - 00:46) it looks like the floating head actually raised up (not pushed down) from the carpeting.  Although this could be do to the brushroll tuffs pushing against the mid/high pile carpeting when the vac is set to a low-pile setting.

Q:  Is the “Airmuscle” pushing (downward) or pulling the nozzle upward when vacuuming your mid/deep pile carpeting?


Thanks,
DIB

I just took another look at iMacDaddy’s video (in slow-mo) and it sure looks like the head is indeed pulled or Airmuscle’d up and off the carpeting.  Unlike what Dyson.com describes (terminology and animation), that is... the Airmuscle pushes into the carpeting.  This vacuum should rank highest of any Dyson at CR, etc.

So...  It looks like Dyson dumbed-down their Airmuscle (sure to come) 30 second t.v. commercial presentation and marketing/description for the consumer.  Folks “get” the concept of a tighter grip on most anything is typically a good thing (i.e. to push the head into carpeting). folks would probably not understand as easily or Dyson could not convey in a 30 second t.v. commercial, etc., the lifting (via suction) carpeting up and into the nozzle story.


What Dyson invented is HUGE!


 DIB

DysonInventsBig wrote:
Hi DIB,

I view the nozzle lifting up as a result of the brush roller pushing down on the carpet, lifting up the floor nozzle as a result.  I like using the "Deep pile" lowest brush roll setting because I feel it delivers the best results for deep cleaning, even though I should probably be using the medium, and even low pile settings for some of the carpets in my household (actually my parents household until I go to college this fall).  Despite the visible lifting, the Airmuscle piston is actually pulling the nozzle inward, which in effect tightens the nozzles contact with the surface.  At first I was curious to see if the piston was actually working at first, since I could not feel the nozzle being pushed into the floor, so I place the maching on a table with the floor nozzle off the edge as I turned the machine on.  As I had it running, I gently kept the nozzle lifted, and as I went from the Bare floor to the Low, Medium, and Deep pile settings, the piston actually did pull in the floor nozzle with considerable amounts of tension.  So now I know that it does indeed function.  I also tried the same test without the clear bin attached (meaning no airflow carried to the floor nozzle), and the air piston did not work, concluding that it draws the pressure from the main airflow, and not from some internal air compressor like I originally theorized.

I also had a little accidental run-in with a sock today that allowed me to see how the clutch would function during an obstruction, and it is not loud and irate like the clutch in a DC07 or DC14.  I didn't even know I ran over the sock until I had noticed the brushroll stopped rotating.  Then I looked over and saw a bright LED flashing from within the translucent red power button.  After that, I turned off the machine for a few seconds, removed the sock, and then turned it back on, and the brush roll was rotating as normal.  Shortly after that, I ran into some loose thick carpeting that was not propertly tacked down into the floor (think of trying to vacuum a bathroom rug), and once again, the clutch activated, with the light flashing again.  Doing what I did before, I turned off the machine, and turned it back on, with the brush roll running again.  The main observation that I gathered from these little mishaps is that the clutch does not emit any loud clicking/ratcheting noises that can be intensely irritating (for me anyway), like with the old DC07 and DC14.  It just stops the brush as an electric motor would with a shut off function.

iMacDaddy wrote:

Oh that's definately better than before. The previous screaming clutch was enough to induce a heart attack in folks of a certain disposition.

It's good that this new model can get more grit out of deeper pile carpets. Just a pity that it took Dyson a few models to get the brush design right.

Thanks for taking the time and effort to post your findings.

Trilobite wrote:

Recalling the many number of dyson models that were rolled out, and subsequently were disappointments, and then finally discontinuations [with HUGE numbers of dyson refurbs, repacks, and remanufactures], I have to ask if dyson's timing for finally getting it right [assuming the DC28 does] is too late. 

Carmine D.

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Consumer Reports has tested the DC28, and it has earned a "Very Good" score on the carpet cleaning test. They also noted the pet hair performance, as well as tool airflow performance. However, they made a note of how the DC28 may be difficult to push and pull on carpets....which can be the case only if you don't have the brush dropped low enough; like trying to vacuum deep pile carpets with the "short pile" setting.

http://blogs.consumerreports.org/home/2009/06/dyson-dc28-animal-upright-airmuscle-vacuum-consumer-reports-vacuum-reviews-ratings-best-vacuum-dc17.html

iMacDaddy wrote:

The additional gadgetry in the brush roll housing adds to the vacuum's nozzle weight when pushing and pulling.  Add the usual vacuuming resistance from brush roll action, it makes pulling/pushing an issue and the proper height setting more important. 

Carmine D.