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Discussions > Espresso > Machines > Bezzera owners...  
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bhiggins
Senior Member


Joined: 7 Jan 2014
Posts: 1
Location: Canada
Expertise: I love coffee

Espresso: Bezzera BZ07
Grinder: Baratza Vario
Posted Tue Jan 7, 2014, 3:55pm
Subject: Re: Bezzera steam wand
 

Hi Shawn, you mention that the 2 hole tip works really well.  Are you able to tell me the part number as well as where you purchased it ?

Thanks,

Brian
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caffeinatedjen
Senior Member


Joined: 28 Dec 2004
Posts: 313
Location: michigan
Expertise: I love coffee

Espresso: Bezzera B707
Grinder: Mazzer Mini
Roaster: Behmor
Posted Wed Jan 8, 2014, 12:02pm
Subject: Re: Bezzera owners thread
 

I think this is the one he is talking about, although mine is stainless steel not gold colored.  It helped me a lot, although I can't say that I get perfect microfoam every time still.
Click Here (www.1st-line.com)
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IB
Senior Member
IB
Joined: 24 Jan 2011
Posts: 61
Location: pittsburgh
Expertise: I like coffee

Espresso: Kim Lever, Bezzera BZ07
Grinder: Vario
Posted Wed Jan 8, 2014, 4:09pm
Subject: Re:steam tip
 

I'm 90%sure this is the one i got click here Chris Coffee, works nicely for me on the BZ07 - I have the burn-me arm.  I just like the 4hole better than 2, but this one has smaller holes and the steam volume seems about right for me.
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Shawn12
Senior Member
Shawn12
Joined: 19 Oct 2012
Posts: 72
Location: Barrie,ON, Canada
Expertise: I love coffee

Espresso: Bezzera BZ07
Grinder: Vario/Virtuoso...
Vac Pot: Yama 5/Balancing Siphon
Drip: Brazen
Roaster: Behmor 1600
Posted Fri Jan 10, 2014, 7:36pm
Subject: Re: Bezzera steam wand
 

bhiggins Said:

Hi Shawn, you mention that the 2 hole tip works really well.  Are you able to tell me the part number as well as where you purchased it ?

Thanks,

Brian

Posted January 7, 2014 link

Hi Brian

I actually bought a whole set.  They are for the Rocket but they fit perfectly. Pretty sure the rocket no burn steam wand will fit too if you care.

Click Here (www.idrinkcoffee.com)

Shawn
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jferreir
Senior Member


Joined: 23 Apr 2014
Posts: 16
Location: Toronto
Expertise: Just starting

Posted Wed Apr 23, 2014, 9:20am
Subject: Re: Bezzera owners thread
 

I recently bought the Bezzera BZ10, along with the manual BB005 grinder. I'm completely new to home espresso, and I'm struggling to pull a drinkable shot, nevermind a good one. In nearly every case, the shot is extremely sour. From what I understand, sour shots mean the coffee is under-extracted, which can be corrected by doing one or more of the following:
- Finer grind
- Lower dose
- Lighter tamp
- Shorter HX flush

None of the above methods have really worked. I noticed that the gauge fluctuates between 6-9 bars during the brewing cycle, and doesn't exhibit the consistent pressure increase to 12 bars like in this video. I emailed the vendor about this, and he suspects I might be overloading the circuit in the kitchen. He suggested that I experiment with the machine in a different room, or with other appliances unplugged. I will try that later tonight, but I'm hoping to get some pointers from other Bezzera owners as well.

The grind setting is very fine, although I can't give a precise measurement since the BB005 doesn't have marked settings. If I grind any finer, then it nearly stops the flow of coffee, so I presume the grind setting is correct. I'm using between 13-15gr in the double-basket, with about 30lb of pressure when tamping. For consistency, I weighed the ground coffee using a digital scale, and my tamping pressure with a bathroom scale (only initially as my tamping pressure was pretty close to 30lbs). I've experimented with increasing/decreasing both the grind and the dose, but I haven't noticed much change. I have tried a long cooling flush, a short cooling flush, and no flush at all. Most times the shot is super sour, and only sometimes is it super bitter (usually when I have an excessively long extraction or no flush at all). Could the problem be my tamping? I'm pretty sure I've been close to 30lbs of force, and I'm reasonably level.

I'm familiar with the taste of the beans used at my local cafe, so I have 3lbs arriving later tonight. The recommended brew parameters for these beans seem at odds with what's recommended for this machine (e.g., 18gr dose vs. 14gr dose). Here are the recommended brewing parameters provided by the roaster. Based on those parameters, what do you think would work best for this machine? What should the dry weight be? The liquid weight? How long should the extraction take, and how long of a cooling flush would you recommend?

Sorry for asking so many questions, but I'm really frustrated having just spend a good chunk of money on something that has yet to produce a single cup of enjoyable coffee (already used 2lbs). Any help would be greatly appreciated.
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IB
Senior Member
IB
Joined: 24 Jan 2011
Posts: 61
Location: pittsburgh
Expertise: I like coffee

Espresso: Kim Lever, Bezzera BZ07
Grinder: Vario
Posted Wed Apr 23, 2014, 11:07am
Subject: New BZ10 growing pains
 

There's a lot to consider here...but first let me say - your experience is not all that unusual.  Getting great (or even consistently good) shots will often take weeks or months of experimenting with all the parameters, especially since you are new to it, and this is brand new equipment as well.  So..don't panic, be patient...fail up!

In aid of chilling out and enjoying the process, I suggest you try mixing a little sugar into your shots now and then.  Not necessarily so much as to make it sweet, but to help balance them.  Not saying this as a way to fix your issues, but it's a way to enjoy your equipment and taste something really yummy today. Perhaps that's a no-no to some purists, but it works for me.

There's so much written on CG and elsewhere about dialing in your machine, and your shots.  Keep reading and experimenting.  Are your shots pouring within the typical parameters of time, flow rate, bonding behavior?
Paying attention to those aspects of the pour seem to be the most important ( aside from taste of course!).
I would suggest that you don't worry too much about your tamping, but keep adjusting dose and grind to dial in on the above parameters.

You could try up-dosing as much as the machine will allow, with a courser grind, then down-dosing with a finer grind.  If you can get a pour to behave well at these two extremes, you should notice some taste differences.
That might help you start to get a feel for controlling toward what tastes good to you.

Another important thing - different coffees, with different roast profiles, have made maybe the biggest difference to my taste buds, over all the other factors.  I have purchased various high-end espresso blends that I could only seem to get shots on the sour end from...these were all very lightly roasted. But if I use a bean or blend that's a bit more medium roast - just a few pinpoints of oil appearing - I have much easier time getting shots that I like.

Hope some of that helps - let us know a bit more about how your shots are extracting.

Isaac
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jferreir
Senior Member


Joined: 23 Apr 2014
Posts: 16
Location: Toronto
Expertise: Just starting

Posted Wed Apr 23, 2014, 4:08pm
Subject: Re: New BZ10 growing pains
 

IB Said:

There's a lot to consider here...but first let me say - your experience is not all that unusual.  Getting great (or even consistently good) shots will often take weeks or months of experimenting with all the parameters, especially since you are new to it, and this is brand new equipment as well.  So..don't panic, be patient...fail up!

Posted April 23, 2014 link

Is it really that common for the bar pressure to fluctuate between 6-9 during extraction? Nothing about this seems normal to me. I can hear the pump chugging along, very much struggling to reach the proper pressure. I just spoke with a technician over the phone, and he confirmed that this kind of fluctuation indicates that something isn't working right. His response was simply that the power is insufficient, and it likely has more to do with the electrical circuit than the actual machine. He said most new machines do not ship with a faulty pump. Now I have to drive 1 hour to have this machine inspected by the vendor, with no guarantee that it will ever work in my apartment.

I'm certainly not a happy Bezzera owner...
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IB
Senior Member
IB
Joined: 24 Jan 2011
Posts: 61
Location: pittsburgh
Expertise: I like coffee

Espresso: Kim Lever, Bezzera BZ07
Grinder: Vario
Posted Wed Apr 23, 2014, 6:24pm
Subject: Re: New BZ10 growing pains
 

jferreir Said:

Is it really that common for the bar pressure to fluctuate between 6-9 during extraction? Nothing about this seems normal to me.

Posted April 23, 2014 link

I have a bz07, so I don't have a brew pressure gauge like you do.

It's a bummer if you have a machine that needs some attention right out of the box. I had a few performance issues with mine from new, and my vendor is like 7 hours away.
I have a good friend who has had the same machine for  years with no issues at all.
Hang in there, and keep us posted.

His response was simply that the power is insufficient, and it likely has more to do with the electrical circuit than the actual machine. He said most new machines do not ship with a faulty pump

But i do think these machines sometimes ship with OPV's that need to be adjusted.  Mine was not adjusted correctly from the factory, resulting in a very loud pump and high pressure.
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jferreir
Senior Member


Joined: 23 Apr 2014
Posts: 16
Location: Toronto
Expertise: Just starting

Posted Thu Apr 24, 2014, 12:16pm
Subject: Re: New BZ10 growing pains
 

IB Said:

I have a bz07, so I don't have a brew pressure gauge like you do.

It's a bummer if you have a machine that needs some attention right out of the box. I had a few performance issues with mine from new, and my vendor is like 7 hours away.
I have a good friend who has had the same machine for  years with no issues at all.
Hang in there, and keep us posted.

But i do think these machines sometimes ship with OPV's that need to be adjusted.  Mine was not adjusted correctly from the factory, resulting in a very loud pump and high pressure.

Posted April 23, 2014 link

My impression is that this unit was sold with a faulty pump; I believe the OPV is factory set at 12 bar. I've found a few similar reports of fluctuating pressure, but no verified solution, unfortunately. To help explain the issue, I found some YouTube videos that exhibit the same problem.

Here is how the BZ10 extraction should perform under normal operation:
https://www.youtube.com/watch?v=bwCh00zrwMg

Notice how the vibration noise cuts down about halfway through, and the pressure maxes out at about 12 bars?

Now, this video demonstrates how the pump is operating on my machine:
https://www.youtube.com/watch?v=PxCtUOoQnYY

This is nearly identical to what I'm experiencing. When I start the extraction, the pressure will increase to about 9 bars, and then rapidly fluctuate between 6 and 9. I can hear the pump chugging on and off, and it never reaches that smooth sound like in the first video. This tells me that the pump is either faulty, or about to fail. If true, this is pretty abysmal QC on Bezzera's part. I've played around with the dose and grind, but it has no affect on the fluctuating pressure.

Can anyone offer any insights based on the above videos? I'm taking it in for service next Monday, so it would be helpful if I could identify the problem and a potential solution beforehand. I don't live near the vendor, so I'm hoping to have this machine repaired as I wait. Thanks for any and all help.
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cingkrab
Senior Member


Joined: 10 Jun 2009
Posts: 27
Location: Ottawa
Expertise: Just starting

Posted Thu Apr 24, 2014, 1:08pm
Subject: Re: New BZ10 growing pains
 

jferreir Said:

My impression is that this unit was sold with a faulty pump; I believe the OPV is factory set at 12 bar. I've found a few similar reports of fluctuating pressure, but no verified solution, unfortunately. To help explain the issue, I found some YouTube videos that exhibit the same problem.

Here is how the BZ10 extraction should perform under normal operation:
https://www.youtube.com/watch?v=bwCh00zrwMg

Notice how the vibration noise cuts down about halfway through, and the pressure maxes out at about 12 bars?

Now, this video demonstrates how the pump is operating on my machine:
https://www.youtube.com/watch?v=PxCtUOoQnYY

This is nearly identical to what I'm experiencing. When I start the extraction, the pressure will increase to about 9 bars, and then rapidly fluctuate between 6 and 9. I can hear the pump chugging on and off, and it never reaches that smooth sound like in the first video. This tells me that the pump is either faulty, or about to fail. If true, this is pretty abysmal QC on Bezzera's part. I've played around with the dose and grind, but it has no affect on the fluctuating pressure.

Can anyone offer any insights based on the above videos? I'm taking it in for service next Monday, so it would be helpful if I could identify the problem and a potential solution beforehand. I don't live near the vendor, so I'm hoping to have this machine repaired as I wait. Thanks for any and all help.

Posted April 24, 2014 link

Does the same behavior happen with a blind filter?  If it doesn't it's most likely not the pump.
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