The Swan has a straight through flow path, with rotating outer burr and stationary inner burr. There's an AC voltage field that dissipates static charge in the ground coffee and the claim from La Marzocco is that retention is zero. As I mentioned, I was given a tour of a prototype of the Swan severa...

Hi there: Where is the 10-15 gm prior to getting a fresh dose value from? Is that a desire from people or a product claim for the Swan. I went through the videos currently on You tube and didn't hear of such a value. All discussion was on zero retention, unless I missed something. -Greg

More boulders is what I would have expected. -Greg

Depends on the grinder and burr type - flat or conical. Flat burrsets are pretty insensitive to axial misalignment and axial runout - the conditions where the rotational axis of the rotating burr is not concentric with the center axis of the stationary burr, or where the two axes may or may not be c...

I was given a tour of one of the Swan prototypes at Host in 2019. The static charge elimination scheme is really brilliant, and solves a problem that vexes all commercial cafes and most home users. RDT is the traditional fix for static charge in grinders. RDT helps reduce static charge, but it doesn...

It's been a while since I've tuned any PID systems, but maybe this is helpful. As I recall, P is somewhat arbitrary. Pick a P that is conveniently fast to do what you want. Integral value depends on the behavior of the device. Insufficient I will have oscillation about the setpoint. This is called u...

Pretty interesting shop you have there. Did you shoot those photos? Does that plane fly? Anyway, I can't answer your question, although I'm surprised that your machine worked perfectly after 30 years of storage. The North American distributor for Nuova Simonelli is Nuova Distribution, in Ferndale Wa...

Plenty of parts missing on the outside. Is there no manufacturer's plate with information on it? I would not bother with it. -Greg

Well air is 78% nitrogen. Argon is pretty pricey. Nitrogen is less so. I sorta don't like putting CO2 into the atmosphere. All schemes require infrastructure (regulator, sealing scheme etc.). I've always just frozen my coffee. -Greg

In theory it's instantaneous, but there is probably some mixing in the boiler that adds time but I think any added time is negligible and certainly no reason to discard temperature as a means of controlling pressure in this application. -Greg