Re: Xenia espresso machine
Geplaatst: zo 03 mar 2019, 08:11
Finally each group is similar to other groups, asbobbee schreef: za 02 mar 2019, 20:11 Zeker de BZ serie van bezzera vertoont grote gelijkenissen door de verwarmde groep.
1 - you can insert a portafilter
2 - you need any kind of heating
3 - the surface finish is chrom
4 - it is in any way round and installed on the front of a machine
Often people think that it is very similar to a BZ07/10 because we use heating cartridges.
But we decided after some measurements to not use the cartridges to heat the brewgoup for a long time. Brewgourps heated by cartridges and controlled by a thermostat is having always a remarkable hysteresis. It is something like 3C difference from the lowest to the highest temperatur within 2 or 3 minutes.
To avoid misunderstanding: this is ok and it is working.
But we decided to attached the brewgroup to the boiler by a 6mm copperbridge to get a more stable heating of the group.
We saw that cartridges are very good to have a fast startup: 20-25 minutes. And as we doing the programming of the arduino due by ourself we have been able to lower the time to ~12-13 minutes (with 2 x 100 Watt cartridges).
After the thermostat indicates that we have ~90° we continue heating by 90 seconds (what means: ~105 C). It is kind of overheating the group to support the heating of the other parts inside the machine.
As you see: we use known technology but we tried to improve the way of using it to get useful results. 12-13 minutes for a complete heating up a boiler-machine is very useful
I hope you understand what I try to say (with my English).
You can find some information also here: http://xenia.coffee/thermische-eignung/ if you the the translate-button the the bottom.
en uitleg waren niet nodig geweest. Het is heel simpel, je koopt met de Xenia een mooie degelijke machine met keuze mogelijkheden die, als die je aanstaan mooi van pas komen. Eigenlijk net zoals je voor een Rocket of Lelit Bianca of....wat dan ook kiest. 