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Topic: Missy vs SL-90 was > Re: +PID'ing Miss Silvia. Why? (8 msgs / 133 lines)
1) From: Mike McGinness
From: "Ben Treichel" 
<Snip>
Many reasons for my decision. Full size commercial style portafilter, larger
boiler, 3-way valve, stainless steel no plastic, excellent long term
reviews.
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
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2) From: jim gundlach
On Saturday, January 11, 2003, at 11:49 AM, Mike McGinness wrote:
"Ben Treichel"  wrote:
 > Ok, since I will someday be able to move up to a better espresso
 >machine, why PID Miss S. Why not just buy a Solis SL-90? Its already
 >PID'ed (or at least micro controled). I know alot of you have a 
Miss,>and are just improving/tinkering, but >why a Miss over a SL-90?
I have a SL-90 and would love to trade it for a Miss Silvia.  I do not 
think it is actually PIDed like people who are modifying Miss Silvia.  
The set of sensors and temperature control in the SL-90 do not provide 
any more stable temperature than the stock Miss Silvia.  The Miss 
Silvia is better built and will last longer than the SL-90.  Besides, 
it will match the Rocky.
Jim Gundlach
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3) From: Ben Treichel
jim gundlach wrote:
<Snip>
Interesting. Would like to know what data you have on temperature 
stability of the two. Not chalaging your statement. Just looking for 
more information. I find it interesting that you have the S-90.
Ben
<Snip>
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4) From: jim gundlach
On Saturday, January 11, 2003, at 06:56 PM, Ben Treichel wrote:
<Snip>
Soon after I got the SL-90, someone on the list reported on a range of 
temperatures they got out of the Miss Silvia and how they were 
temperature surfing to get an ideal shot,  It might have been Mike.  I 
performed a similar test on the SL-90 and found very much the same 
range.  I then started to temperature surf on the SL-90.
Jim Gundlach
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5) From: Ben Treichel
jim gundlach wrote:
<Snip>
That really does negate the advantage of the micro on the SL-90. I 
wonder if anybody else has seen the same thing. I don't hang at alt. 
coff., do you? If so, have you ever seen this discussed?
Thanks,
Ben
<Snip>
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6) From: jim gundlach
As far as I can tell the use of the microprocessors on the Solis SL-90 
is to automate the amount of water pumped through to extract a shot.  
What the SL-90 does with the computing power is work toward ease of 
use.  That is, you push a few buttons and it will produce the size of 
shot you want without you having to stand there and count the seconds 
or watch the shot glass before you turn it off.  I see no sign that it 
tries to control the heating element.  Actually it looks like it works 
the other way around.  When the heating element comes on, it will not 
let you start pumping water through the filter.  This is the case when 
it gets turned on because the water is too cold or you turn it on to 
produce steam.  I see no sign that they use the computing power to tune 
in water temperature to an ideal.  It would be nice to have a digital 
display where you could select temperatures between something like 195 
and 205 and it would control the heater to try to keep the temperature 
as close to that as possible.  It should be easy to do but it is not 
there.
Jim Gundlach
On Saturday, January 11, 2003, at 11:11 PM, Ben Treichel wrote:
<Snip>
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7) From: Mike McGinness
From: "jim gundlach" 
 I see no sign that they use the computing power to tune 
<Snip>
Sounds like another PID project!
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
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8) From: Greg Scace
don't know about the solis, but I have reams of temperature data on Silvia, 
which you can prolly find on Google.  silvia with PID has wey better 
thermal stability than any HX machine using a pressurestat.  Silvia is just 
a good basic design.   A few tweaks and then WOW!!  I
-Greg
At 07:56 PM 1/11/2003 -0500, you wrote:
<Snip>
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