A few thoughts:malachi wrote:First thoughts are that I seem to be getting more of the "clarity" from the espresso made with this machine that with other home machines. It's still not quite as defined as what I would get off a Mistral or the like, but it's less fuzzy. I'm thinking it is probably the result of the rotary pump in this case
1. Would you mind briefly explaining how the Flojet pump system works? I've never used one of them. My reason for asking is, of course, if the inlet pressure to the rotary pump varies, the outlet pressure will vary by the same amount. I'm just wondering if pressure control is poorer with this setup as compared to a typical plumbed in commercial machine.
2. Even if pressure control is poorer than in a commercial setup, it may still be better than in many vibe machines (which is probably the point you were making above).
3. Aside from pressure variation and pressure control, another variable is the time it takes for pressure to rampup at the beginning of the extraction. Depending on the way the rotary is setup, this could be one second or many seconds. Vibe pump rampups are usually 5-10 seconds.
Apologies again if I'm restating obvious stuff.