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Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
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MarkPrince
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Posted Wed May 7, 2014, 12:00am
Subject: Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
 

Slayer Booth and Slayer One Group - SCAA 2014 Show Report
Road Reports article by Mark Prince

At the SCAA 2014 Trade Show, The Slayer Espresso Machine company formally debuted their long awaited one group espresso machine. Read our show report!
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canuckcoffeeguy
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Posted Thu May 8, 2014, 5:35am
Subject: Re: Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
 

Any idea what the one group will cost?
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uscfroadie
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Posted Thu May 8, 2014, 9:53am
Subject: Re: Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
 

canuckcoffeeguy Said:

Any idea what the one group will cost?

Posted May 8, 2014 link

$8500 + options ($350 for programmable pre-infusion, various charges for wood selected for actuators/handles, various charges for finishing options).  If you want it, they can probably build it.   More specs here  If you are interested, email them at sales@slayerespresso.com

Nice to see Aaron Blanco of Brown Coffee manning the One Group on your top photo.
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MarkPrince
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Posted Thu May 8, 2014, 1:18pm
Subject: Re: Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
 

canuckcoffeeguy Said:

Any idea what the one group will cost?

Posted May 8, 2014 link

USCFroadie beat me to the punch but I had the price in the article in the last paragraph but I think I accidentally deleted it or something before transferring the words from my word processor to the CoffeeGeek CMS system. Went back in and added it again. I didn't know programmable preinfusion costs extra; if that's just part of the software package that they "enable" that's a cheap grab; if they have to add physical hardware to the machine to make it happen (I'm not sure that would be the case?) then it seems reasonable.

Mark

 
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yarrenbool
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Posted Thu May 8, 2014, 4:16pm
Subject: Re: Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
 

MarkPrince Said:

I didn't know programmable preinfusion costs extra; if that's just part of the software package that they "enable" that's a cheap grab; if they have to add physical hardware to the machine to make it happen (I'm not sure that would be the case?) then it seems reasonable.

Mark

Posted May 8, 2014 link

Just how important is preinfusion to making a great coffee?

.
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tek
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Posted Fri May 9, 2014, 6:21am
Subject: Re: Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
 

Great write up Mark. Reading about One Group Slayer I see that most of the features were already in Synesso Hydra over two years ago. Pretty much pressure profiling setup is identical, the power sleep mode is identical with exception that Synesso will not go back to sleep when woken up, I'd love to have that :-)

Its really nice looking machine.

 
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Posted Fri May 9, 2014, 10:28am
Subject: Re: Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
 

uscfroadie Said:

$350 for programmable pre-infusion

Posted May 8, 2014 link

This is untrue for the 1-group. It has a pre-brew timer feature as standard. It's just a setting that you can turn on and off in the touchscreen UI, and if it's on, it's just a time (in seconds) for the machine to open water flow through the needle valve path only, before going to full brew.

Pre-brew timers are an extra on multi-group machines, not on the single group. On those machines, there is additional hardware involved in adding in timed pre-brew support.
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shadowfax
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Posted Fri May 9, 2014, 10:48am
Subject: Re: Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
 

Mark, from your article:

If you are not aware, the Slayer's actuator arm (that lever on the grouphead) is multiposition, so moving it only half way activates the machine's pre-brewing, low pressure mode. Moving the actuator arm to the complete left then activates the full pressure the machine is programmed and set up for. On this new 1 group Slayer, the display panel has a live count for the prebrewing mode (actuator arm moved halfway), and then jumps over to show shot brewing time at full pressure.

I think that you should make clear that "pre-brew" isn't precisely "low pressure mode." That is to say, it should be referred to as "restricted flow rate mode". The pump on the Slayer 1 group operates at a constant speed during extraction regardless of whether you're in pre-brew or brew mode, providing relatively consistent pressure upstream of the gicleur and/or needle valve. The difference is the flow rate that is delivered to the group

Technically, in most all cases the practical upshot of this flow restriction is a lower normalized pressure, meaning that the restricted flow at the needle valve means that the pressure attained when water has saturated the space above the puck (and the puck itself), there is sufficient flow such that the pressure doesn't reach full pressure. But if you were to put a blind filter in (preventing any flow through the group), full pressure would be attained during pre-brew. The actual pressure that you attain during pre-brew depends on the flow resistance that the puck gives, all other things being equal. The more flow restriction the puck provides, the higher the pressure you see during "pre-brew" will be.

The important thing, though, is that the needle valve setting used in pre-brew controls the rate of the initial pressure ramp as well as the pressure that it peaks at. The ability to "shape" that pressure ramp is something that you don't really get from a machine with line pressure preinfusion (like a Synesso) or a gicleur chamber (like an E61 or a Nuova Simonelli Aurelia). This is the mechanism by which the Slayer lets you grind many notches finer than most other espresso machines. I think the distinction is worth clarifying.
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tek
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Posted Fri May 9, 2014, 12:05pm
Subject: Re: Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
 

shadowfax Said:

This is the mechanism by which the Slayer lets you grind many notches finer than most other espresso machines. I think the distinction is worth clarifying.

Posted May 9, 2014 link

Synesso Hydra allows exactly the same. Shaping the pressure ramp-up and duration allows me to grind much, much finer than when I use fast ramp up to 9 bars. Here is video from Synesso explaining 4 stage pressure ramp: https://www.youtube.com/watch?v=n30X11t1H4A

I can see how needle valve adds definite more control, but one can adjust the line pressure on Synesso to get similar ramp up and in my experience once you find something that works for you on line pressure front for pre-infusion, you don't change. Whether you grind finer or coarser then is controlled by ramp up i.e. time you spent on line pressure (Stage 1) and on Stage 2 pressure (bypass). This lets me control how fine I grind. More time I spend in these 2 stages the finer I can grind, less time I spend the coarser I can grind...

Its not 100% same as Slayer, but its close...

 
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MarkPrince
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Posted Fri May 9, 2014, 1:50pm
Subject: Re: Slayer Booth and Slayer One Group - SCAA 2014 Show Report, Road Reports
 

shadowfax Said:

This is untrue for the 1-group. It has a pre-brew timer feature as standard. It's just a setting that you can turn on and off in the touchscreen UI, and if it's on, it's just a time (in seconds) for the machine to open water flow through the needle valve path only, before going to full brew.

Pre-brew timers are an extra on multi-group machines, not on the single group. On those machines, there is additional hardware involved in adding in timed pre-brew support.

Posted May 9, 2014 link

I'm glad you cleared this up. When Jason demo'ed the machine to me, he showed me how this was something that was controlled via the control panel touchscreen, and I was thinking "if they charge $350 for this just to enable it in software..." I'm glad to hear its not the case at all.

Mark

 
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