by cafeIKE on Thu Aug 12, 2010 1:40 pm miKe mcKoffee wrote:Isn't 1st-Line the Master Importer for Vibiemme? Maybe not, my recall may be in error. The quote was from 1st-Line website information on the DD.
Don't get me started on how useless the web is at times.
miKe mcKoffee wrote:Have you actually scrolled through the temp adjustment in program mode and confirmed it does NOT skip a degree in F every couple degrees as stated by 1st-Line?
Every couple of days, sometimes several times a day, for past several years.
miKe mcKoffee wrote:Disagree that there's no value in 0.1F temperature resolution on ANY E61, especially brew boiler temperature control on a DB vs HX brewing temp via steam boiler control.
The plain and simple fact is environmental conditions swamp any pretense of such fine grained adjustability on an e61 thermosyphon. The group can vary several degrees over the course of a day as ambient conditions change. My DD is an air-conditioned office where the temperature is 76±1°F year round. Other than an environmental test chamber, that is as benign as one is likely to find for an espresso machine. Over the course of a day, the boiler temp, measured with a TC in the boiler, is an almost flat line and the group varies with the air conditioning. The group is cooler in the summer afternoon as the aircon works harder. There is less variability in the winter as the air temperature is maintained by the computers. The air conditioning is VERY diffuse and does not blow directly on the machine. To give an indication of how diffuse, the typical home aircon vent exit speed is about 2-4 knots. These vents do not register on the anemometer.
This image from Buyer's Guide to the Quick Mill Alexia - Page 5 show that sub 1°F spread for an e61 thermosyphon is wishful thinking:
HB wrote:Bottom line: Quickmill Alexia's intrashot and intershot temperature stability is the best I've measured in a prosumer class machine.
Can we agree 0.5°F adjustability would be nice, along with a 2nd PID input from the group?
