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The Crossland Espresso Machine Project - potential game changer
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sweaner
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sweaner
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Posted Sun Feb 27, 2011, 4:31pm
Subject: Re: The Crossland Espresso Machine Project - potential game changer
 

Bill, that "entry level" machine has great specs!  Similar to the Quickmill Silvano.  Any pictures to whet our appetite.

 
-Scott
“Coffee - the favorite drink of the civilized world.”
Thomas Jefferson
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aecletec
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Posted Sun Feb 27, 2011, 8:10pm
Subject: Re: The Crossland Espresso Machine Project - potential game changer
 

I really hope this gets off the ground... but even so it might not make it out to my neck of the woods :(
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billc
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Posted Wed Mar 2, 2011, 12:20am
Subject: Re: The Crossland Espresso Machine Project - potential game changer
 

I have always thought it would be a cool idea to have some participation from the home-barista community.  I would be open to this.  It would probably be around 50-100 machines however.  Might even be able to create some kickback program is sales go well during the first couple of years.  

Don't have a lot of time right now to think about it but there is some potential.


Bill
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billc
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Posted Wed Mar 2, 2011, 12:32am
Subject: Re: The Crossland Espresso Machine Project - potential game changer
 

Forgot to answer the other questions above:
Bio reactors use stainless steel mostly because of the inert qualities of stainless steel and the ability to sterilize it easily.  There are others too.  We like to limit brass contact for a couple of reasons.  Low pH values of the water can actually etch the surface of the brass causing particles (copper and lead) to contaminate the water.  Additionally there is heavy metal in most brass and the more it is reduced the more expensive it is...............


Pictures of the new entry level machine should be available this month.  I have a few models here but wanted to wait until I have some professional photos to post
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artichoke
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Posted Thu Mar 3, 2011, 11:55am
Subject: Re: The Crossland Espresso Machine Project - potential game changer
 

billc Said:

...

I have 3 designs currently for controlling this machine and have not yet decided which is the best in terms of price/value/durability.  Here is the one method that I have applied for a patent.  It involves the use of proportional valves.  Proportional valves have the ability to control the flow rate of the water through them by varying the voltage applied to the coil.  I use 2 of these valves.  One for cold water and one for hot water (hot water is heated via a heat exchanger in the steam boiler).  I mix the two streams right before the 3 way valve.  Also at that point I measure the temperature.  I am able to control the 2 valves via a microprocessor to achieve the proper temperature and pressure.  
Open both valves at 20% and you get one pressure
Open both valves at 50% and you get another pressure
Open the hot more than the cold and you get hotter water etc. ...

Posted March 21, 2010 link

I think this should work.  It's the way the mixer faucet at my powder room sink works.  It's time we moved some of this "new" technology into espresso machines! :)
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DNAofCoffee
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Posted Fri Mar 4, 2011, 1:17am
Subject: Re: The Crossland Espresso Machine Project - potential game changer
 

billc Said:

I have 3 designs currently for controlling this machine and have not yet decided which is the best in terms of price/value/durability.  Here is the one method that I have applied for a patent.  It involves the use of proportional valves.  Proportional valves have the ability to control the flow rate of the water through them by varying the voltage applied to the coil.  I use 2 of these valves.  One for cold water and one for hot water (hot water is heated via a heat exchanger in the steam boiler).  I mix the two streams right before the 3 way valve.  Also at that point I measure the temperature.  I am able to control the 2 valves via a microprocessor to achieve the proper temperature and pressure.  
Open both valves at 20% and you get one pressure
Open both valves at 50% and you get another pressure
Open the hot more than the cold and you get hotter water etc.
Bill C

Posted March 21, 2010 link

Assuming the cold water is not temp controlled, the microprocessor/controller would need temp data from both the hot and cold water streams (as well as mixed) to calculate and adjust for the relative percent open for each valve.  Otherwise you could have the mixed water running through the group until starting temp is reached at which point the portafilter would be loaded.  For the pressure, it seems you would need a digital pressure sensor since the pressure at the coffee grounds, without real time adjustments, would vary from shot to shot depending on the grind, dose and tamp.

 
Michael Silberg
San Francisco, CA
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DNAofCoffee
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DNAofCoffee
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Posted Fri Mar 4, 2011, 1:36am
Subject: Re: The Crossland Espresso Machine Project - potential game changer
 

Maybe next you could pre-feed the cold stream from two proportionally valved and separately pumped reservoirs: one with distilled, deionized water and another with loaded mineral water.  Mineral profiling, baby!

 
Michael Silberg
San Francisco, CA
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nixter
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Posted Fri Mar 4, 2011, 10:03am
Subject: Re: The Crossland Espresso Machine Project - potential game changer
 

I started following this thread way back but I no longer wish to. I can't find an unsubscribe button anywhere! Where is it or how do I do this?

Thanks
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networkcrasher
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Posted Fri Mar 4, 2011, 11:27am
Subject: Re: The Crossland Espresso Machine Project - potential game changer
 

click on the first link at the top of the notification e.mail.  It should take you to the post you created when you subscribed to the thread.  Click edit post and deselect the "email notification" checkbox.
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nixter
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Espresso: Giotto Evoluzione, Oscar Pro
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Posted Fri Mar 4, 2011, 11:30am
Subject: Re: The Crossland Espresso Machine Project - potential game changer
 

Thank you.
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