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what is surprising is the first i heard of using a pressure transducer for the steam boiler. ( but i am sure there are other machines which use pressure transducers?) which means depending on the electronics used the steam boiler can act almost instantaneously to pressure changes as compared to temperature which is a secondary effect of the pressure drop. The same principle applies in refrigeration where we do use transducers and can maintain much more stable pressure via a pressure transducer rather than measuring temperature.
If the slayer is setup for 220vac it will have more "juice" at 240VAC, as long as the components can take it should be an advantage.
Originally posted by JamesM View Post
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Wow, they have changed a lot in this design from the slayer 2.0
Previously it was all flow rate control, this design with the variable pump now gives full pressure control as well during pre-brew and brew. Very interesting.
Hopefully it doesn't whine like the stradas.
Not so keen on a touch screen, havn't seen a photo of it yet though, i like the full manual aspect of a slayer.
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?? Err,? isnt the common "pressure stat" as used on most serious espresso m/c's ,..a type of pressure transducer ?Originally posted by brettreaby View Postwhat is surprising is the first i heard of using a pressure transducer for the steam boiler. ( but i am sure there are other machines which use pressure transducers?) .
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No? If it was considered one it would provide 1-bit of information, signifying below or above some value and not even accurate in doing that.Originally posted by blend52 View Post?? Err,? isnt the common "pressure stat" as used on most serious espresso m/c's ,..a type of pressure transducer ?
A pressure transducer provides an analog signal (0-5v,0-24v,4-20ma etc) that can be converted to 8/10/12/24 bit digital, as an example 10-bit conversion of a 3bar range transducer would provide 0.003bar resolution.
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As stated the pressure transducer gives a linear output. A pressure stat provides an on/off signal: like a thermostat which has a band (hysteresis). So with a "stat" you always get a range- But with a transducer and PID type control you can maintain a very tight band.
Also stats being more mechanical in nature settings can drift over time. Transducers tend to use a resistive network printed onto a diaphragm so movements are very minimal and repeatable. ( there are also other types).
Originally posted by blend52 View Post?? Err,? isnt the common "pressure stat" as used on most serious espresso m/c's ,..a type of pressure transducer ?
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OK, thanks for the clarification.Originally posted by Jimmytheboot View PostNo? If it was considered one it would provide 1-bit of information, signifying below or above some value and not even accurate in doing that.
A pressure transducer provides an analog signal (0-5v,0-24v,4-20ma etc) that can be converted to 8/10/12/24 bit digital, as an example 10-bit conversion of a 3bar range transducer would provide 0.003bar resolution.
Is there some advantage in using a pressure transducer rather than a temperature transducer (thermocouple ?) and PID control ?
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Faster response time than RTDs, and they are easier to interface with microcontrollers.Originally posted by blend52 View PostOK, thanks for the clarification.
Is there some advantage in using a pressure transducer rather than a temperature transducer (thermocouple ?) and PID control ?
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Wowsers, I had a play with one of these and made a few coffees at MICE. Amazing to use, fit & finish is beautiful. Suggested cost around $10k however it was not definitive. Obviously customisation with some beautiful hardwood panels will increase cost :P
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Hello all, not sure if this is my first post as have been lurking for years! I had a play with the Slayer at MICE, it does look like a great machine. Unfortunately I can't agree with the fit and finish being beautiful as I thought it was pretty atrocious - horrible scorched welds on the top warming tray, front panels with sizeable gaps to the body, poorly finished paddle.. perhaps prototype manufacturing but certainly not precision work worthy of a mega price tag.Originally posted by timmyc View PostWowsers, I had a play with one of these and made a few coffees at MICE. Amazing to use, fit & finish is beautiful. Suggested cost around $10k however it was not definitive. Obviously customisation with some beautiful hardwood panels will increase cost :P
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Technically anything that converts from one type of energy to another is a transducer... </pedant>Originally posted by Jimmytheboot View PostNo? If it was considered one it would provide 1-bit of information, signifying below or above some value and not even accurate in doing that.
A pressure transducer provides an analog signal (0-5v,0-24v,4-20ma etc) that can be converted to 8/10/12/24 bit digital, as an example 10-bit conversion of a 3bar range transducer would provide 0.003bar resolution.
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Eh, it's a prototype, it's pretty typical for them to be a bit "rough around the edges", I'm sure the production units will be finished to the same standard as their two and three group units.Originally posted by TickTok View PostUnfortunately I can't agree with the fit and finish being beautiful as I thought it was pretty atrocious - horrible scorched welds on the top warming tray, front panels with sizeable gaps to the body, poorly finished paddle.. perhaps prototype manufacturing but certainly not precision work worthy of a mega price tag.
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Sure, but Ticktok was responding to the previous post......it's a prototype, it's pretty typical for them to be a bit "rough around the edges",
Just shows how people's standards can be very different !Originally posted by timmyc View Post... I had a play with one of these and made a few coffees at MICE. Amazing to use, fit & finish is beautiful.:P
Seems odd to put a m/c "on show" that apparently has cosmetic defects ?
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