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HX Machine Too Hot?  Non-drinkable bitter shots
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Discussions > Espresso > Machines > HX Machine Too...  
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mariog7
Senior Member


Joined: 7 Mar 2011
Posts: 210
Location: NJ
Expertise: I love coffee

Espresso: Quickmill Vetrano
Grinder: Vario
Posted Fri Mar 29, 2013, 11:37am
Subject: HX Machine Too Hot?  Non-drinkable bitter shots
 

Hello, All.  I have a Quick Mill Vetrano and I'm getting frustrated because every shot I have been pulling lately has beem utterly, undrinkably bitter!

Nothing had changed in my routine.  I roast my own beans fresh from SM.  Cleaned out my grinder (Vario) throughly and even pulled the e61 shower cap and cleaned it, along with my basket.  

I noticed that when giving a cooling flush, the water dance seems like it takes quite a while to stop, but again, this could be me.

Any ideas, guys?  This is killing me cause I went from sweet god shots to undrimkable crap.

Thank you all.
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,672
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Fri Mar 29, 2013, 1:50pm
Subject: Re: HX Machine Too Hot?  Non-drinkable bitter shots
 

I recently bumped up the temp on my E61 and went from sweet to bitter, bitter is too hot. It may require more than just ending the water dance, if the group is too hot, it can keep the temp too high even after the dance is over. Try dropping the temp a little and see what happens.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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mariog7
Senior Member


Joined: 7 Mar 2011
Posts: 210
Location: NJ
Expertise: I love coffee

Espresso: Quickmill Vetrano
Grinder: Vario
Posted Fri Mar 29, 2013, 1:54pm
Subject: Re: HX Machine Too Hot?  Non-drinkable bitter shots
 

Thanks for the reply.  Here is some more info:

I went to my local artisan roaster to buy some of their beans (to rule out my roasting) and even went so far as to have them grind some coffee to rule out any problems with my grinder.  After all of these variables, every shot is still disgustingly bitter. So something is wrong with my machine.

Calblacksmith, how can I drop the temp, as you suggest?  I though the temp on a HX machine was invariable?
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mariog7
Senior Member


Joined: 7 Mar 2011
Posts: 210
Location: NJ
Expertise: I love coffee

Espresso: Quickmill Vetrano
Grinder: Vario
Posted Fri Mar 29, 2013, 1:56pm
Subject: Re: HX Machine Too Hot?  Non-drinkable bitter shots
 

Oh, also - the meter reads dead on 9 bar under load when pulling a shot.  

I really suspect its a temp issue because of the bitterness, and also the creama is pretty black.

ARRRGGGHHH!
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Markarian
Senior Member
Markarian
Joined: 27 Jun 2012
Posts: 656
Location: Seattle Area
Expertise: I love coffee

Espresso: ECM Technika IV Profi WT-WC
Grinder: Baratza Forte AP, HG One
Vac Pot: Bunn Trifecta MB
Drip: Moka, Aeropress, Hario V60
Roaster: Behmor 1600
Posted Fri Mar 29, 2013, 2:49pm
Subject: Re: HX Machine Too Hot?  Non-drinkable bitter shots
 

What does your boiler pressure gauge say?
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mariog7
Senior Member


Joined: 7 Mar 2011
Posts: 210
Location: NJ
Expertise: I love coffee

Espresso: Quickmill Vetrano
Grinder: Vario
Posted Fri Mar 29, 2013, 2:50pm
Subject: Re: HX Machine Too Hot?  Non-drinkable bitter shots
 

Pressure stat kicks in at .9 bar, kicks off at 1.2 bar.
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mariog7
Senior Member


Joined: 7 Mar 2011
Posts: 210
Location: NJ
Expertise: I love coffee

Espresso: Quickmill Vetrano
Grinder: Vario
Posted Fri Mar 29, 2013, 3:18pm
Subject: Re: HX Machine Too Hot?  Non-drinkable bitter shots
 

Also, this is a plumbed in machine and I have a softener / filters.  My water pressure seems fine, but do you think this could cause the shot to be too hot?  It's the only variable I didn't consider.

This sucks!  I'm giving up and buying the BDB.  At least I can vary the temp.
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dsblv
Senior Member


Joined: 2 Dec 2006
Posts: 191
Location: Bellevue, WA
Expertise: I like coffee

Espresso: Rocket Giotto Evoluzione
Grinder: MACAP MC4
Posted Fri Mar 29, 2013, 3:50pm
Subject: Re: HX Machine Too Hot?  Non-drinkable bitter shots
 

The problem you're having is probably fixable with a little routine troubleshooting.  But, if you've made up your mind, then go for the BDB.  I'm sure someone will be glad to pick up your used Vetrano.
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mariog7
Senior Member


Joined: 7 Mar 2011
Posts: 210
Location: NJ
Expertise: I love coffee

Espresso: Quickmill Vetrano
Grinder: Vario
Posted Fri Mar 29, 2013, 3:55pm
Subject: Re: HX Machine Too Hot?  Non-drinkable bitter shots
 

But the problem is that there is no troubleshooting - HX machines temps are invariable, at least from my understanding.  I had a long talk with Chris' Coffee tech who was very helpful, but even he was at a loss trying to troubleshoot.  So I feel like I have a big boat anchor.
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,672
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Fri Mar 29, 2013, 4:05pm
Subject: Re: HX Machine Too Hot?  Non-drinkable bitter shots
 

There is a device in the machine called a pressure stat. It is what adjusts the temp and yes it is adjustable, did you see where I said that I ADJUSTED WARMER?

I adjusted TO 1.2 from 1.0. You need to take the top of the machine off to get acess to it but once it is right you will not need to touch it again.

It is a small turn of a screwdriver and you are done, yes HX machines can be adjusted.

Sell it and buy something else if you wish but you don't need to.

Little things can make big changes in espresso and though the machine is within "normal" settings, so they still will be if you lower the temp to ~ 1.0 to 1.1 bar.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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