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Trying to Decide R58, Quickmill Qm7,  Breville DB
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Discussions > Espresso > Machines > Trying to Decide...  
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DavecUK
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Joined: 21 Sep 2005
Posts: 1,326
Location: UK
Expertise: I love coffee

Posted Tue Feb 5, 2013, 9:31am
Subject: Re: Trying to Decide R58, Quickmill Qm7,  Breville DB
 

BubbaDude Said:

A boiler can be too large, actually. The more water you have to heat, the more time and money it costs. Since the brew water is pre-heated by the steam boiler in these machines, the brew boiler doesn't have to be very big or made out of massive slug of brass or copper and therefore in need of a massive heating coil.

Posted February 3, 2013 link

I don't believe the brew water is pre-heated in the R58 or Quickmill QM7, I'm not sure about the Breville, but from internal photos I've seen I don't think that preheats the brew water either. There is certainly a minimum size a brew boiler needs to be for good thermal stability, a large boiler is thermally stable, perhaps not optimum, but boilers below a certain size are best avoided if possible.

Machines that definitely preheat the brew boiler water are the Brewtus DB (Ironic because it doesn't need to with such a large brew boiler and the preheat system is too powerful. The other is the Duetto, where I designed/tested and built the preheat system in my workshop.. There may be others...
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CMIN
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Joined: 14 Jun 2012
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Expertise: I like coffee

Espresso: Crossland CC1
Grinder: Baratza Preciso
Posted Tue Feb 5, 2013, 9:37am
Subject: Re: Trying to Decide R58, Quickmill Qm7,  Breville DB
 

DavecUK Said:

I don't believe the brew water is pre-heated in the R58 or Quickmill QM7, I'm not sure about the Breville, but from internal photos I've seen I don't think that preheats the brew water either. There is certainly a minimum size a brew boiler needs to be for good thermal stability, a large boiler is thermally stable, perhaps not optimum, but boilers below a certain size are best avoided if possible.

Machines that definitely preheat the brew boiler water are the Brewtus DB (Ironic because it doesn't need to with such a large brew boiler and the preheat system is too powerful. The other is the Duetto, where I designed/tested and built the preheat system in my workshop.. There may be others...

Posted February 5, 2013 link

I know the Breville does, water is pulled and preheated first from steam boiler, so when it hits the brew boiler there's no cool down effect like if it were pulling directly from the tank. Think other DB machines are the same except for Vivaldi.
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cuznvin
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Posted Tue Feb 5, 2013, 10:10am
Subject: Re: Trying to Decide R58, Quickmill Qm7,  Breville DB
 

Isn't too large or too small subjective? What is actually too large or too small?
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CSME9
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CSME9
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Posted Tue Feb 5, 2013, 10:14am
Subject: Re: Trying to Decide R58, Quickmill Qm7,  Breville DB
 

On the QM 67 & Brewtus IV I believe the brew water is preheated from the steam boiler. I thought i read somewhere the R58 was not and were seperate boiler systems.

WS
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CSME9
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CSME9
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Espresso: Isomac Tea, Rancilio Silvia,...
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Posted Tue Feb 5, 2013, 10:19am
Subject: Re: Trying to Decide R58, Quickmill Qm7,  Breville DB
 

Ok so what are the extra costs/feature differences ?  


ILUVDABEAN Said: Does it cost more to build a Ferrari or a Honda Civic?
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Italo2275
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Posted Tue Feb 5, 2013, 4:25pm
Subject: Re: Trying to Decide R58, Quickmill Qm7,  Breville DB
 

Ok Guys Well I am abit pissed of and maybe made a wrong choice, So I am playig around with the machine and this noise come up. Now you tell me if this is normal. I am going to bring it back and if they say they have to send it in I will tell them give me a new Izzo3. What you think?


Link to the noise it makes

http://youtu.be/WnNNgBu-cV8
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CSME9
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CSME9
Joined: 26 Feb 2004
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Location: West Texas
Expertise: I live coffee

Espresso: Isomac Tea, Rancilio Silvia,...
Grinder: Rancilio Rocky
Drip: Moka Pot
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Posted Tue Feb 5, 2013, 4:42pm
Subject: Re: Trying to Decide R58, Quickmill Qm7,  Breville DB
 

Italo2275-Not sure what that whirring sound is, maybe the OPV. What is the brew preassure when pulling a shot ? Are you plumbed in, if you are try the tank to see if it goes away.

It's a nice looking shot-maybe the vendor can swap it for another in stock R58.
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Italo2275
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Posted Tue Feb 5, 2013, 4:48pm
Subject: Re: Trying to Decide R58, Quickmill Qm7,  Breville DB
 

No It is not plummed in,Iam using the tank.
Man so dissapointing.
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DavecUK
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Joined: 21 Sep 2005
Posts: 1,326
Location: UK
Expertise: I love coffee

Posted Tue Feb 5, 2013, 10:32pm
Subject: Re: Trying to Decide R58, Quickmill Qm7,  Breville DB
 

Italo2275 Said:

Ok Guys Well I am abit pissed of and maybe made a wrong choice, So I am playig around with the machine and this noise come up. Now you tell me if this is normal. I am going to bring it back and if they say they have to send it in I will tell them give me a new Izzo3. What you think?

Posted February 5, 2013 link

Pull a shot with a blind filter installed:

  1. Whats the brew pressure
  2. see if it still makes the noise. If it does..check the OPV/Expansion valve return whilst pulling a shot against the blind filter. If you see water coming out, the expansion valve is set incorrectly.
  3. There might be air trapped in the OPV line (I did recommend it was at the highest point within the machine, not at the bottom).

There are some other things it might be, but favorite is the expansion valve set incorrectly....report back.

Dave
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acasabia
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acasabia
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Espresso: Expobar Brewtus iv-p,...
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Roaster: hot-air popper.
Posted Wed Feb 6, 2013, 9:20am
Subject: Re: Trying to Decide R58, Quickmill Qm7,  Breville DB
 

Italo2275 Said:

Ok Guys Well I am abit pissed of and maybe made a wrong choice, So I am playig around with the machine and this noise come up. Now you tell me if this is normal. I am going to bring it back and if they say they have to send it in I will tell them give me a new Izzo3. What you think?


Link to the noise it makes

http://youtu.be/WnNNgBu-cV8

Posted February 5, 2013 link

It sounds a bit operatic, perhaps this feature should come with all Italian machines?

it sounds like the OPV, when you filled the machine for the first time did it make this noise? Has it made this noise since you've owned it, or just recently?

 
Anthony C

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Dallis Bros (NYC): New York Espresso

http://coffeeandneuroscience.wordpress.com/
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