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pump volume vs. grinder volume
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coffeestig
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Joined: 25 Feb 2013
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Location: Charlotte
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Espresso: Quick Mill QM67
Grinder: Mazzer Mini Electronic...
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Posted Thu Feb 28, 2013, 6:06pm
Subject: pump volume vs. grinder volume
 

So as the title states, what is the difference between the volume [from a pump0 on an espresso machine vs. a grinder?  Most of the talk about a rotary vs. vibrating pump is centered around volume; if the volume of a grinder is still louder than a vibrating pump (I'll know for sure tomorrow when the UPS man comes but just curious) then is noise really a decision factor?

This is setting aside the functionality differences and the need to go rotary for a plumbed in setup.
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JasonBrandtLewis
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JasonBrandtLewis
Joined: 9 Dec 2005
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Location: Berkeley, CA
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Espresso: Elektra T1 - La Valentina -...
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Posted Thu Feb 28, 2013, 9:38pm
Subject: Re: pump volume vs. grinder volume
 

A pump measures volume in liquid (fluid ounces or milliliters); a grinder would measure it in grams . . .

 
A morning without coffee is sleep . . .
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germantownrob
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germantownrob
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Location: Philadelphia
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Espresso: Duetto 3, A Dead Oscar
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Posted Thu Feb 28, 2013, 9:57pm
Subject: Re: pump volume vs. grinder volume
 

I don't know, I have all my stuff custom made so the volume goes to 11.

It's not the decibels but the frequency. My rotary pump machine is not as quiet as others are. My Oscar's vipe pump makes  a symphony of sound, my Vario is very mono toned and runs for half the the time of a shot, a k30 is done grinding a double in under 5sec or so.
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Jmanespresso
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Jmanespresso
Joined: 18 Jan 2009
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Location: Westchester NY
Expertise: I live coffee

Espresso: Alex Duetto II
Grinder: Compak K10 - Vario
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Posted Thu Feb 28, 2013, 11:29pm
Subject: Re: pump volume vs. grinder volume
 

Grinders are really all over the map in terms of volume.  Small Conicals, like a Capresso Infinity, are loud and obnoxious IMO.  As you go up in price and burr size, the grinders are more rigid and well built, and the sound becomes more pleasant.

My Major for instance makes noise, sure, but its not a super high pitched vibrating "whiirrrrrrr".  When the beans aren't being ground its just a low hum of the motor running.  


But, all grinders make noise, some more then others.  IDK that I would call any of them quiet. Try doing a youtube search of different grinders to get an idea of how they sound.



For me, the difference in sound with the Vibe Pump/Rotary pump isn't about keeping the noise down when Im making coffee.  Ive grown to really dislike the sound of a vibe pump machine with all the buzzing and rattling associated along with it.  Believe it or not, if you removed the vibe pump from your machine and mounted it elsewhere, and made the mounting secure with some sort of shock absorbtion, you would be seriously impressed with how quiet they are.  Its the way they're mounted, with the rest of the machine vibrating along with it, that makes all the racket.  After two E61 vibe pump machines, Ive grown to really dislike the sound.  So while my current machine is a lovely smooth sounding rotary pump, my grinder is still the same volume, and there is still noise made when Im making coffee.

You have a QM67 which is much quieter then other vibe pump machines.  Some of them are incredibly annoying until they;re under pressure during the shot.  Others not as bad, but all vibe pump machines, unless you mount the pump seperately, will have the same characteristic of a vibrating resonance, in one form or another.

 
Follow Your Bliss

Coffee makes your constantly overcome your prejudices and re-evaluate your own "received wisdoms" when it comes to judging cup flavors. -Tom Owen, SweetMarias
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NobbyR
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NobbyR
Joined: 10 Jul 2011
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Location: Germany
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Espresso: Poccino Opus One, Ariete
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Posted Fri Mar 1, 2013, 2:51am
Subject: Re: pump volume vs. grinder volume
 

I don't think the sound of an espresso machine will ever be considered disturbing, no matter if it's a rotary or a vibration pump, the later being somewhat louder. But the noise level of some grinders will make conversation in their vicinity stop.

 
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"This drink of the Satan is so delicious that it would be a shame to leave it to the infidels." (Pope Clement VIII on coffee, when he was urged to ban the beverage)
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