Vesuvius Pressure Profiling Machine - General Discussion

Can anyone with this machine tell me what their is like as I think I’m loosing it.

I am under impression the steam boiler pressure drops lower and recovers much slower during steaming than it used to. I had it set at 125c and recently found I had to increase to 127c which is still not whatnot should be.

I flush and wait for it to come back to 127c before starting to steam. Only 160ml milk in the pitcher.
It falls to 122c before you notice it starting to recover although you can hear the boiler kick in around 125c.

I hope it’s just my mind playing games but I am convinced it wasn’t like that.

prezes Check your advanced settings because it sounds as if the steamboiler is behaving more like a PID control than on/off control. You need to set the PID parameters for the steamboiler to behave like an/off controller.

DavecUK thanks @DavecUK . These are the settings at the moment:

prezes if that’s settings for the steam boiler, change them to kP =20, kI=0 and kD= 0

is there an associated B setting for the steam boiler?

DavecUK I’m sorry Dave I had to double check. The above are brew boiler settings.

Steam boiler:

DavecUK thanks a lot. I will test tomorrow and report back

So it definitely acts differently. I’ve got it set at 126c yet it goes up to 128c and then slowly comes back to 126c. When steaming it still falls but now not lower than 123c

prezes Which is exactly what you want

DavecUK yes, it seems to behave mich better now. Thanks for your help Dave.

sketchy I second that as was meant to ask the same thing. What makes me wonder as well is why does this develop with time and is not an issues that is there on new machine with the original settings.

sketchy

That’s good to know

If by any chance you have time please @DavecUK it would be good to get your thoughts on the “best” settings

Below are what was set on my V1 and V2 Evo

No actual current issues I’m aware of, just curious 😻

prezes Doing a bit more investigation on this, against what the default settings were (especially P & D), I’m suspecting the default PID settings paired with the capabilities of the boiler (size vs the mount it is heating) are to help prevent a more severe oscillation that may occur with the new settings. But I’m thrilled with being able to maintain steam boiler pressure better.

DavecUK Most certainly. Let me check when I have a chance. Thanks Dave.

sketchy

It definitely does.

I’ve seen someone else say the same as you as it partly follows the same tube internally that’s used to fill the tank if you plumb it in….. comes from the solenoid. Easy too go cross eyed and follow the wrong pipe!!

JahLaza Vesuvius wastes a lot of water to the drip tray for the first 20 seconds or so of each shot. Not like a dribble but a pretty big flow. I’m currently using the stock profile 1, which shoots up to 11 bar, not sure but don’t ‘think’ it wasted this much water before I’ll try get a video next shot, but, does this sound right?

I believe the water is coming from the vent valve not the expansion valve, at least that’s what it looked like to me on the video. A few questions, so I can help you.

• How old is it, from new.
• Sounds like it didn’t always do it, when did it start (or you first notice it
• The vent valves usually open at 11.5 to 12.5 bar as that’s when the spring pressure is finally overcome
• When did you last backflush it and do you backflush it properly.